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Papers by mehdi khayyat

Summer pruning on seedless barberry: preliminary results on alternate bearing behavior

DOAJ (DOAJ: Directory of Open Access Journals), Sep 1, 2022

Effects of Different Levels of NPK Fertilizer and Fulvic Acid on Morphogical Characteristics, Yield and Yield components of Basil as a Medicinal Plant (Ocimum basilicum L. )

Agroecology, 2019

Soil and nutrition

CABI eBooks, 2021

Journal of Agricultural Sciences – Sri Lanka

Purpose: Seedless barberry is one of the most important small fruits, which is cultivated in dry ... more Purpose: Seedless barberry is one of the most important small fruits, which is cultivated in dry areas of east of Iran. However, due to high water content (~80%) and thin skin it is susceptible to postharvest decay, and thus it has a short postharvest life. Research Method: This study was carried out to investigate the impact of pre-harvest application of calcium nitrate 0.5% and potassium nitrate 0.5%, and cold storage on biochemical and postharvest quality attributes of fresh seedless barberry fruits in the 2017 and 2018 growing seasons. Findings: The results showed that both chemicals applied resulted in better appearance and firmness in both years. In addition, control fruit were redder in the 2017 season. Fruit at harvest had the highest content of vitamin C (21.11 mg.100g-1) in 2017 and total phenolic content (7.36 mg.100g-1) in 2018 compared to stored fruit. Interestingly, the highest total anthocyanin was obtained after 30 days of cold storage, 1146.13 and 3071.32 mg.L-1, re...

Purpose: The present research was conducted to evaluate interactive effects of manganese (Mn) and... more Purpose: The present research was conducted to evaluate interactive effects of manganese (Mn) and Alfalfa mosaic virus (AMV) on some physiological characteristics of two pepper varieties including PS301 and California Wonder under greenhouse conditions. Research Methods: Treatments included two levels of virus infection (infected and non-infected), three levels of Mn concentrations (No manganese: 0ppm, 5ppm and 10ppm) and two varieties (California Wonder and PS301). After three weeks, total chlorophyll (Chl), carbohydrate, antioxidants, phenolic compounds, dry weight and proline were measured in aerial parts. Findings: The highest antioxidant activity observed in California Wonder treated with AMV and 5ppm Mn. The highest total Chl observed in PS301 when treated with 10 ppm Mn. Interaction between Mn and AMV showed the highest dry weight in virus infected plants without Mn supplying. Simple effects of AMV did not influence on total Chl, total carbohydrate and antioxidant, but signif...

Journal of Ornamental plants, 2016

Leaf area information is required in various horticultural and physiological studies and it will ... more Leaf area information is required in various horticultural and physiological studies and it will be more useful if done via non-destructive methods. The objective of this study was to establish equations to estimate leaf area (LA) using length (L), width (W), fresh weight (FW), dry weight (DW), length × length (L2), width × width (W2), length × width (L×W), length + width (L+W), fresh weight × fresh weight (FW2) and dry weight × dry weight (DW2) of coneflower (Echinacea purpurea L.) leaves as a medicinal and landscape plant. An open field experiment was carried out to study relationship between leaf dimension and weight with leaf area of this plant. Observed leaf area was obtained by an automatic measuring device and leaf dimensions were measured by a ruler. A linear model employing L × W as an independent variables [LA = 0.575 (L × W) - 0.934] resulted in the most accurate estimation (R2 = 0.874, RMSE = 2.33) of coneflower leaf area. Validation of the regression model showed that t...

Effect of Organic and Inorganic Substrates on Vegetative and Ecophysiological Characteristics of Coleus (Coleus Blumei)

Journal of Science and Technology of Greenhouse Culture -Isfahan University of Technology, Apr 15, 2011

In order to study of the effect of substrates on vegetative and ecophysiological characteristics ... more In order to study of the effect of substrates on vegetative and ecophysiological characteristics of coleus plant, coleus cuttings containing two leaves were planted in perlite, cocopeat, peatmoss, compost, 50% perlite + 50% cocopeat, 50% perlite + 50% peatmoss, 50% perlite + 50% compost, 5% cocopeat+50% peatmoss, 50% cocopeat + 50% compost and 50% peatmoss + 50% compost with four replicates. Cuttings were irrigated by hydroponic solution after root formation. Results indicated that the highest root fresh and dry weight was observed in 50% perlite + 50% compost treatment, the highest secondary roots in perlite treatment, and the longest root and stem, the most fresh and dry weight of shoot, number of leaves and photosynthesis were observed in peatmoss treatment. Result showed that the best substrate for growth and development of coleus plant is peatmoss.

Effect of organic and inorganic substrates on vegetative and ecophysiological characteristics of coleus (Coleus blumei)

Journal of Science and Technology of Greenhouse Culture -Isfahan University of Technology, 2011

In order to study of the effect of substrates on vegetative and ecophysiological characteristics ... more In order to study of the effect of substrates on vegetative and ecophysiological characteristics of coleus plant, coleus cuttings containing two leaves were planted in perlite, cocopeat, peatmoss, compost, 50% perlite + 50% cocopeat, 50% perlite + 50% peatmoss, 50% perlite + 50% compost, 5% cocopeat+50% peatmoss, 50% cocopeat + 50% compost and 50% peatmoss + 50% compost with four replicates. Cuttings were irrigated by hydroponic solution after root formation. Results indicated that the highest root fresh and dry weight was observed in 50% perlite + 50% compost treatment, the highest secondary roots in perlite treatment, and the longest root and stem, the most fresh and dry weight of shoot, number of leaves and photosynthesis were observed in peatmoss treatment. Result showed that the best substrate for growth and development of coleus plant is peatmoss.

تأثیر اسید هیومیک و تراکم بنه بر ویژگیهای بنههای دختری و عملکرد گل زعفران در سال دوم

به منظور بررسی اثرات اسید هیومیک و تراکم کاشت بر صفات رویشی و زایشی زعفران، آزمایشی به صورت فاکتو... more به منظور بررسی اثرات اسید هیومیک و تراکم کاشت بر صفات رویشی و زایشی زعفران، آزمایشی به صورت فاکتوریل در قالب طرح پایه بلوک‏های کامل تصادفی، در مزرعه دانشکده کشاورزی دانشگاه بیرجند در سال زراعی 1395- 1394 اجرا شد. فاکتورها شامل اسید هیومیک در چهار سطح (صفر، 5، 10 و 15 کیلوگرم در هکتار) و تراکم کاشت در سه سطح (50، 75 و 100 بنه در مترمربع) با سه تکرار بودند. نتایج نشان داد که اسید هیومیک اثر معنی‏داری بر صفات بنه (وزن کل بنه و وزن ‏تر و خشک بنه دختری) داشت، به ‏طوری‌که بیشترین وزن کل بنه (09/23 گرم در بوته) در نتیجه اعمال تیمار 5 کیلوگرم در هکتار اسید هیومیک به دست آمد. همچنین، نتایج سال دوم آزمایش، نشان دهنده تاثیر معنی‏دار اسید هیومیک بر صفات گل (تعداد و عملکرد کل گل تر و عملکرد کلاله تر و خشک) بود، به طوری‌که بیشترین عملکرد کلاله تر و خشک (35/1 و23/0 گرم در مترمربع به ترتیب) در سطح 10 کیلوگرم در هکتار اسید هیومیک حاصل شد، و کمترین مقدار این صفات در تیمار شاهد مشاهده گردید. تراکم کاشت نیز بر تعداد و عملکرد کل گل تر و عملکرد کلاله تر و خشک تاثیرگذار بود، به طوری‌که بیشترین میزان این ص...

The First Report on Nutrient Distribution and Resorption in Mature Alternate Bearer Seedless Barberry Trees: Storage Pools of Nitrogen, Phosphorus, Potassium and Carbohydrates

Erwerbs-Obstbau

Alternate Bearing, Chlorophyll Fluorescence Performance, Vegetative Growth and Fruit Quality of Seedless Barberry Under Different Mulching Treatments

Erwerbs-Obstbau

Application of kaolin on different chemical and physical properties of pomegranate

Journal of Plant Nutrition

Journal of Horticultural Science, 2016

Pomegranate is a subtropical fruit that is widely consumed as fresh fruit and juice, however, its... more Pomegranate is a subtropical fruit that is widely consumed as fresh fruit and juice, however, its postharvest life is limited mainly due to storage disorders. The aim of this study was to determine the effect of nitric oxide (NO) on antioxidant activity and quality attributes of pomegranate fruit. The fruits were dipped for two minutes into different NO concentrations (0, 30, 100, 300 or 1000 µM). Then, the fruits were stored in cold room at 5 °C and RH 85%. After 90 days storage, changes in chilling injury, electrolyte leakage, titratable acidity (TA), total soluble solids (TSS), pH, antioxidant activity and total anthocyanin were evaluated. The results showed that 1000 µM NO application resulted in significant decrease in electrolyte leakage and TSS and maintained antioxidant activity and total anthocyanin in pomegranate fruit. However, no significant effect of NO treatment was observed on TA and chilling injury index. In conclusion, postharvest application of NO may be a promisin...

Background: The time of gibberellic acid application in the non-bearing year (OFF year) makes the... more Background: The time of gibberellic acid application in the non-bearing year (OFF year) makes the different responses on seedless barberry plants in it (OFF year) and next year (ON year). Objective: The present research was conducted to evaluate the effects of gibberellin sprays applied at different times on barberry plants. Methods: The experiment was performed in three consecutive years (2016 to 2018) in Amirabad, Birjand, Iran. The treatments included: 1) Gibberellic acid (GA3 at 200 ppm), and 2) control (0 ppm), applied six times as foliar spraying on non-bearing trees, between April and September. The foliar sprays and measuring of vegetative traits were done on non-bearing trees in 2016 and 2017. Reproductive traits evaluated on bearing trees in 2017 and 2018. Results: Leaf number, width and length and internode length of current barberry shoots increased significantly. GA3 application significantly decreased by flower and fruit number, TSS/TA and anthocyanin content of fruit ...

Purpose: The objective of this study was to establish equations to estimate leaf area (LA) using ... more Purpose: The objective of this study was to establish equations to estimate leaf area (LA) using length (L), width (W), fresh weight (FW) and dry weight (DW), length × width (L×W), width/length (W/L) of cress leaves as a leafy vegetable and radish leaves as a root vegetable. Research method: An experiment was carried out under greenhouse conditions to study the relationship between leaf dimension and weight with LA of these two vegetable plants. Observed LA was obtained by an automatic measuring device and leaf dimensions were measured by a ruler. Regression analyses of LA versus L, W, FW, DW, L×W and W/L led several models that could be used for estimating the area of individual cress and radish leaves. Findings: A linear model employing FW as an independent variable [LA=0.295 (Fresh W.)+ 1.430] resulted the most accurate estimate (R2 = 0.912, RMSE = 1.52) of cress LA. For radish, a linear model using W as an independent variable [LA=22.50 (W) + 7.46] showed the most accuracy (R2 ...

Journal of Applied Horticulture, 2019

Leaf area information is required in various horticultural and physiological studies. Leaf area m... more Leaf area information is required in various horticultural and physiological studies. Leaf area measurements require easy, quick and possibly non-destructive methods. The objective of this study was to establish equations to estimate leaf area (LA) using length (L), width (W), fresh weight (FW) and dry weight (DW), length×width (L×W), length + width (L+W), width/length (W/L), length 2 (L 2 ) and width 2 (W 2 ) of cress (Lepidium sativum L.) leaves as a leafy vegetable and radish (Raphanus sativus L.) as a root vegetable. A soilcultured experiment was carried out in 2010 under greenhouse conditions to study relationship between leaf dimension and weight with LA of these two vegetable plants. Observed LA was obtained by an automatic measuring device and leaf dimensions were measured by a ruler. Regression analyses of LA versus L, W, FW, DW, L×W, L+W, W/L, L 2 and W 2 led several models that could be used for estimating the area of individual cress and radish leaves. A linear model employing FW as an independent variables [LA=0.295 (Fresh W.)+ 1.430] resulted in the most accurate estimate (R 2 = 0.912, RMSE = 1.52) of cress LA. For radish, a linear model using W as an independent variable [LA=22.50 (W) + 7.46] showed the most accuracy (R 2 = 0.874, RMSE = 11.26) estimating LA. Validation of the regression models showed that the correlation between measured and simulated values using these equations were quite acceptable (R 2 = 0.922, 0.876).

Effects of Soaking Temperature, Stratification, Potassium Nitrate and Gibberellic Acid on Seed Germination of Loquat Trees

Journal of Plant Nutrition, 2012

The present study was carried out to increase loquat seed germination with treatments consisting ... more The present study was carried out to increase loquat seed germination with treatments consisting of two soaking temperatures (24 ± 2°C and 38 ± 2°C), chemical agents [control, 0.5% potassium nitrate (KNO3) and 250 mgL gibberellic acid (GA3) each for 20 h], and different moist chilling (MC) periods (1, 2, 3 and 4 weeks under 4–5°C). Compared with 24 ± 2°C, soaking

Fruits, 2009

Introduction. Probably because pomegranate trees are established in orchards as own-rooted plants... more Introduction. Probably because pomegranate trees are established in orchards as own-rooted plants, there are no studies regarding scion-rootstock combination effects on growth, tree size, yield and fruit quality of this fruit tree. Thus, the main aims of our experiment were to study the effects of some pomegranate rootstocks on growth and yield characteristics of Iranian commercial cultivars used as scions. Materials and methods. Our research was carried out between the 1999 and 2007 growing seasons at a collection of 760 pomegranate cultivars in the Yazd Province of Iran. Rootstocks were provided via clonal propagation using stem cuttings similar in height, diameter and age (2 years old) from 'Golnar Farsi', 'Torsh Ma' moly Zabol', 'Yek Killoy Hoshak Saravan', 'Poost Syah', 'Khafri Poost Sefid Jahrom', 'Zagh', 'Shavar' and 'Malas Esfahani'. Budding materials were provided from fruit-bearing trees in good vigor, using buds on current season growth of the 'Zagh', 'Shavar' and 'Malas Esfahani' pomegranate cultivars. Effects of the scion-rootstock combinations were investigated on tree size, vigor and yield of pomegranate. Results. The data indicated that grafting led to higher yield than the own-rooted plants, but grafted trees showed lower vigor and tree size compared with ungrafted trees. Application of 'Torsh Ma' moly Zabol' as a rootstock led to the lowest tree size and height, and the lowest rate of sunburn scald disorder. The highest yield and the lowest sucker production were obtained in plants grafted on 'Golnar Farsi' rootstock. Conclusion. Our results suggest that application of 'Torsh Ma' moly Zabol' as a rootstock can be useful to establish a high-density plantation. Iran Islamic Republic / Punica granatum / rootstocks / scions / variety trials / yields / vigor Effets de différentes combinaisons de scion/porte-greffe sur la vigueur, la taille de l'arbre, son rendement, et la qualité du fruit de trois cultivars de grenadier iranien. Résumé --Introduction. C'est probablement parce que les grenadiers sont établis en vergers à partir de plantes simplement racinées qu'il n'a été publié aucun rapport sur les effets de la combinaison scion/porte-greffe sur la croissance, la taille de l'arbre, le rendement et la qualité du fruit de cet arbre fruitier. De ce fait, les principaux objectifs de notre expérimentation ont été d'étudier les effets de quelques porte-greffes de grenadiers sur des caractéristiques de croissance et de rendement de cultivars iraniens utilisés comme scions. Matériel et méthodes. Nos recherches ont été effectuées entre les périodes de production de 1999 et 2007 dans une collection de 760 cultivars de grenadiers de la province de Yazd en Iran. Les porte-greffes ont été obtenus par multiplication clonale à partir de boutures de dimension, diamètre et âge (2 ans) semblables, prélevées sur les cultivars « Golnar Farsi », « Torsh Ma' moly Zabol », « Yek Killoy Hoshak Saravan », « Poost Syah », « Khafri Poost Sefid Jahrom », « Zagh », « Shavar » et « Malas Esfahani ». Les scions ont été constitués par des boutures de l'année prélevées sur des arbres vigoureux et productifs appartenant aux cultivars de grenadiers « Zagh », « Shavar » et « Malas Esfahani ». Les effets de la combinaison scion/porte-greffe ont été étudiés sur la taille, la vigueur et le rendement des grenadiers greffés. Résultats. Nos résultats ont montré que les arbres greffés produisaient un meilleur rendement que les arbres racinés, mais que la greffe induisait une taille et une vigueur des arbres inférieures à celles des arbres non greffés. L'utilisation de « Torsh Ma' moly Zabol » comme portegreffe a conduit à la plus basse taille des arbres, et à moins de coups de soleil. Le rendement le plus élevé et la plus basse production de pousses ont été obtenus par les plantes greffées sur le cultivar « Golnar Farsi ». Conclusion. Nos résultats suggèrent que « Torsh Ma' moly Zabol » pourrait être utilement utilisé comme porte-greffe pour établir une plantation à haute densité.

Fruits, 2009

Calcium effects on changes in chlorophyll contents, dry weight and micronutrients of strawberry (... more Calcium effects on changes in chlorophyll contents, dry weight and micronutrients of strawberry (Fragaria × ananassa Duch.) plants under salt-stress conditions. Abstract-Introduction. Today, approximately one-third of the world's irrigated lands suffer some degree of salinity. Although there are several reports about the effects of calcium treatments on strawberry growth and development under saline conditions, there are no reports demonstrating the effect on micronutrient concentrations of strawberry due to supplementary calcium applied to the saltstressed plants. Consequently, we investigated the effects of high salinity levels, with application of supplementary calcium, on chlorophyll contents, dry weight and micronutrients of strawberry. Materials and methods. Strawberry (Fragaria × ananassa Duch.) plants cv. 'Selva' were grown in hydroponic culture in a heated greenhouse to investigate the effectiveness of calcium (Ca) added to nutrient solution applied to plants. Six treatments were applied: nutrient solution alone (= [N]); [N] + NaCl salt (35 mM) (= [NS]); [NS] + CaCl 2 (5 mM); [NS] + CaCl 2 (10 mM); [NS] + CaSO 4 (5 mM); and [NS] + CaSO 4 (10 mM). The effect of calcium (different forms and different concentrations) on chlorophyll contents and dry weight of salt-stressed plants was determined. Additionally, micronutrient contents were studied. Results. The results indicated that chlorophyll contents and plant dry weight were decreased by salinity. NaCl application increased Cu, Zn, Mn and Fe concentrations of root parts. In shoot parts, Cu accumulation decreased, while other elements increased. Supplementary calcium could ameliorate the negative effects of salinity on chlorophyll and dry mass production. However, micronutrient concentrations of plant parts as influenced by calcium had contradictory results: calcium induced high levels of zinc, manganese and iron concentrations in roots, but high levels of copper and zinc concentrations in shoots. Moreover, there were significant differences between calcium forms in their actions. Conclusion. Our results suggest that CaSO 4 could be applied to improve the growth of salt-stressed strawberry plants. Iran Islamic Republic / Fragaria ananassa / salt tolerance / chlorophylls / dry matter content / mineral content Effets du calcium sur la teneur en chlorophylle, le poids sec et les oligoéléments du fraisier (Fragaria × ananassa Duch.) en condition de stress salin. Résumé-Introduction. Aujourd'hui, près d'un tiers des terres irriguées du monde souffrent d'un certain degré de salinité. S'il existe plusieurs rapports sur les effets du calcium sur la croissance et le développement du fraisier en conditions salines, il n'y rien sur l'effet du calcium sur les concentrations en oligoélément de fraisiers cultivés en présence de NaCl. En conséquence, nous avons étudié les effets d'un niveau élevé de salinité combiné avec l'application de calcium supplémentaire, sur les teneurs en chlorophylle, en poids secs et en oligoéléments du fraisier. Matériel et méthodes. Des plants de fraisiers (Fragaria × ananassa Duch.) cv. Selva ont été suivis sous culture hydroponique en serre chaude pour étudier l'efficacité de l'ajout de calcium (Ca) dans la solution nutritive apportée aux plantes. Six traitements ont été appliqués : solution nutritive seule (= [N]) ; [N] + sel de NaCl (35 mM) (= [NS]) ; [NS] + CaCl 2 (5 mM) ; [NS] + CaCl 2 (10 mM) ; [NS] + CaSO 4 (5 mM) ; [NS] + CaSO 4 (10 mM). L'effet du calcium (sous différentes formes et à différentes concentrations) a été déterminé sur le contenu en chlorophylle et le poids sec des plantes stressées. La teneur en oligoéléments des plantes a également été étudiée. Résultats. Nos résultats ont indiqué que la teneur en chlorophylle et le poids sec des plantes étaient diminués par la salinité. L'application de NaCl a augmenté des concentrations en Cu, Zn, Mn et Fe dans les racines. Les teneurs en Cu ont diminué dans la tige, alors que les autres éléments étudiés ont augmenté. L'ajout de calcium a pu compenser les effets négatifs de la salinité sur la teneur en chlorophylle et la production de matière sèche. Cependant, les effets de l'ajout de calcium sur les concentrations en oligoélément dans la plante ont été divers : un niveau élevé a été induit par le calcium pour les concentrations en Zn, en Mn et Fe dans les racines, alors que, dans la tige, ce sont les concentrations en Cu et en Zn qui ont été augmentées. De plus, ces différences ont été significatives. Conclusion. Nos résultats suggèrent que le sulfate de calcium (CaSO 4) pourrait être appliqué avec succès pour améliorer la croissance des fraisiers soumis à un stress salin. Iran République islamique / Fragaria ananassa / tolérance au sel / chlorophylle / teneur en matière sèche / teneur en éléments minéraux

Effects of Calcium Forms on Electrolyte Leakage, Total Nitrogen, Yield and Biomass Production by Strawberry Plants Under Nacl Salinity

Strawberry (Fragaria ananassa Duch.) plants cv. Selva was grown in soilless culture under greenho... more Strawberry (Fragaria ananassa Duch.) plants cv. Selva was grown in soilless culture under greenhouse conditions to present the effects of application of supplementary calcium combined with nutrient solution on plants grown under NaCl (35 mmol) salinity. Treatments: (1) Commercial nutrient solution or control; (2) the addition of NaCl (35 mmol); (3) NaCl (35 mmol) + CaCl 2 (5 mmol); (4) NaCl (35 mmol) + CaCl

Summer pruning on seedless barberry: preliminary results on alternate bearing behavior

DOAJ (DOAJ: Directory of Open Access Journals), Sep 1, 2022

Effects of Different Levels of NPK Fertilizer and Fulvic Acid on Morphogical Characteristics, Yield and Yield components of Basil as a Medicinal Plant (Ocimum basilicum L. )

Agroecology, 2019

Soil and nutrition

CABI eBooks, 2021

Journal of Agricultural Sciences – Sri Lanka

Purpose: Seedless barberry is one of the most important small fruits, which is cultivated in dry ... more Purpose: Seedless barberry is one of the most important small fruits, which is cultivated in dry areas of east of Iran. However, due to high water content (~80%) and thin skin it is susceptible to postharvest decay, and thus it has a short postharvest life. Research Method: This study was carried out to investigate the impact of pre-harvest application of calcium nitrate 0.5% and potassium nitrate 0.5%, and cold storage on biochemical and postharvest quality attributes of fresh seedless barberry fruits in the 2017 and 2018 growing seasons. Findings: The results showed that both chemicals applied resulted in better appearance and firmness in both years. In addition, control fruit were redder in the 2017 season. Fruit at harvest had the highest content of vitamin C (21.11 mg.100g-1) in 2017 and total phenolic content (7.36 mg.100g-1) in 2018 compared to stored fruit. Interestingly, the highest total anthocyanin was obtained after 30 days of cold storage, 1146.13 and 3071.32 mg.L-1, re...

Purpose: The present research was conducted to evaluate interactive effects of manganese (Mn) and... more Purpose: The present research was conducted to evaluate interactive effects of manganese (Mn) and Alfalfa mosaic virus (AMV) on some physiological characteristics of two pepper varieties including PS301 and California Wonder under greenhouse conditions. Research Methods: Treatments included two levels of virus infection (infected and non-infected), three levels of Mn concentrations (No manganese: 0ppm, 5ppm and 10ppm) and two varieties (California Wonder and PS301). After three weeks, total chlorophyll (Chl), carbohydrate, antioxidants, phenolic compounds, dry weight and proline were measured in aerial parts. Findings: The highest antioxidant activity observed in California Wonder treated with AMV and 5ppm Mn. The highest total Chl observed in PS301 when treated with 10 ppm Mn. Interaction between Mn and AMV showed the highest dry weight in virus infected plants without Mn supplying. Simple effects of AMV did not influence on total Chl, total carbohydrate and antioxidant, but signif...

Journal of Ornamental plants, 2016

Leaf area information is required in various horticultural and physiological studies and it will ... more Leaf area information is required in various horticultural and physiological studies and it will be more useful if done via non-destructive methods. The objective of this study was to establish equations to estimate leaf area (LA) using length (L), width (W), fresh weight (FW), dry weight (DW), length × length (L2), width × width (W2), length × width (L×W), length + width (L+W), fresh weight × fresh weight (FW2) and dry weight × dry weight (DW2) of coneflower (Echinacea purpurea L.) leaves as a medicinal and landscape plant. An open field experiment was carried out to study relationship between leaf dimension and weight with leaf area of this plant. Observed leaf area was obtained by an automatic measuring device and leaf dimensions were measured by a ruler. A linear model employing L × W as an independent variables [LA = 0.575 (L × W) - 0.934] resulted in the most accurate estimation (R2 = 0.874, RMSE = 2.33) of coneflower leaf area. Validation of the regression model showed that t...

Effect of Organic and Inorganic Substrates on Vegetative and Ecophysiological Characteristics of Coleus (Coleus Blumei)

Journal of Science and Technology of Greenhouse Culture -Isfahan University of Technology, Apr 15, 2011

In order to study of the effect of substrates on vegetative and ecophysiological characteristics ... more In order to study of the effect of substrates on vegetative and ecophysiological characteristics of coleus plant, coleus cuttings containing two leaves were planted in perlite, cocopeat, peatmoss, compost, 50% perlite + 50% cocopeat, 50% perlite + 50% peatmoss, 50% perlite + 50% compost, 5% cocopeat+50% peatmoss, 50% cocopeat + 50% compost and 50% peatmoss + 50% compost with four replicates. Cuttings were irrigated by hydroponic solution after root formation. Results indicated that the highest root fresh and dry weight was observed in 50% perlite + 50% compost treatment, the highest secondary roots in perlite treatment, and the longest root and stem, the most fresh and dry weight of shoot, number of leaves and photosynthesis were observed in peatmoss treatment. Result showed that the best substrate for growth and development of coleus plant is peatmoss.

Effect of organic and inorganic substrates on vegetative and ecophysiological characteristics of coleus (Coleus blumei)

Journal of Science and Technology of Greenhouse Culture -Isfahan University of Technology, 2011

In order to study of the effect of substrates on vegetative and ecophysiological characteristics ... more In order to study of the effect of substrates on vegetative and ecophysiological characteristics of coleus plant, coleus cuttings containing two leaves were planted in perlite, cocopeat, peatmoss, compost, 50% perlite + 50% cocopeat, 50% perlite + 50% peatmoss, 50% perlite + 50% compost, 5% cocopeat+50% peatmoss, 50% cocopeat + 50% compost and 50% peatmoss + 50% compost with four replicates. Cuttings were irrigated by hydroponic solution after root formation. Results indicated that the highest root fresh and dry weight was observed in 50% perlite + 50% compost treatment, the highest secondary roots in perlite treatment, and the longest root and stem, the most fresh and dry weight of shoot, number of leaves and photosynthesis were observed in peatmoss treatment. Result showed that the best substrate for growth and development of coleus plant is peatmoss.

تأثیر اسید هیومیک و تراکم بنه بر ویژگیهای بنههای دختری و عملکرد گل زعفران در سال دوم

به منظور بررسی اثرات اسید هیومیک و تراکم کاشت بر صفات رویشی و زایشی زعفران، آزمایشی به صورت فاکتو... more به منظور بررسی اثرات اسید هیومیک و تراکم کاشت بر صفات رویشی و زایشی زعفران، آزمایشی به صورت فاکتوریل در قالب طرح پایه بلوک‏های کامل تصادفی، در مزرعه دانشکده کشاورزی دانشگاه بیرجند در سال زراعی 1395- 1394 اجرا شد. فاکتورها شامل اسید هیومیک در چهار سطح (صفر، 5، 10 و 15 کیلوگرم در هکتار) و تراکم کاشت در سه سطح (50، 75 و 100 بنه در مترمربع) با سه تکرار بودند. نتایج نشان داد که اسید هیومیک اثر معنی‏داری بر صفات بنه (وزن کل بنه و وزن ‏تر و خشک بنه دختری) داشت، به ‏طوری‌که بیشترین وزن کل بنه (09/23 گرم در بوته) در نتیجه اعمال تیمار 5 کیلوگرم در هکتار اسید هیومیک به دست آمد. همچنین، نتایج سال دوم آزمایش، نشان دهنده تاثیر معنی‏دار اسید هیومیک بر صفات گل (تعداد و عملکرد کل گل تر و عملکرد کلاله تر و خشک) بود، به طوری‌که بیشترین عملکرد کلاله تر و خشک (35/1 و23/0 گرم در مترمربع به ترتیب) در سطح 10 کیلوگرم در هکتار اسید هیومیک حاصل شد، و کمترین مقدار این صفات در تیمار شاهد مشاهده گردید. تراکم کاشت نیز بر تعداد و عملکرد کل گل تر و عملکرد کلاله تر و خشک تاثیرگذار بود، به طوری‌که بیشترین میزان این ص...

The First Report on Nutrient Distribution and Resorption in Mature Alternate Bearer Seedless Barberry Trees: Storage Pools of Nitrogen, Phosphorus, Potassium and Carbohydrates

Erwerbs-Obstbau

Alternate Bearing, Chlorophyll Fluorescence Performance, Vegetative Growth and Fruit Quality of Seedless Barberry Under Different Mulching Treatments

Erwerbs-Obstbau

Application of kaolin on different chemical and physical properties of pomegranate

Journal of Plant Nutrition

Journal of Horticultural Science, 2016

Pomegranate is a subtropical fruit that is widely consumed as fresh fruit and juice, however, its... more Pomegranate is a subtropical fruit that is widely consumed as fresh fruit and juice, however, its postharvest life is limited mainly due to storage disorders. The aim of this study was to determine the effect of nitric oxide (NO) on antioxidant activity and quality attributes of pomegranate fruit. The fruits were dipped for two minutes into different NO concentrations (0, 30, 100, 300 or 1000 µM). Then, the fruits were stored in cold room at 5 °C and RH 85%. After 90 days storage, changes in chilling injury, electrolyte leakage, titratable acidity (TA), total soluble solids (TSS), pH, antioxidant activity and total anthocyanin were evaluated. The results showed that 1000 µM NO application resulted in significant decrease in electrolyte leakage and TSS and maintained antioxidant activity and total anthocyanin in pomegranate fruit. However, no significant effect of NO treatment was observed on TA and chilling injury index. In conclusion, postharvest application of NO may be a promisin...

Background: The time of gibberellic acid application in the non-bearing year (OFF year) makes the... more Background: The time of gibberellic acid application in the non-bearing year (OFF year) makes the different responses on seedless barberry plants in it (OFF year) and next year (ON year). Objective: The present research was conducted to evaluate the effects of gibberellin sprays applied at different times on barberry plants. Methods: The experiment was performed in three consecutive years (2016 to 2018) in Amirabad, Birjand, Iran. The treatments included: 1) Gibberellic acid (GA3 at 200 ppm), and 2) control (0 ppm), applied six times as foliar spraying on non-bearing trees, between April and September. The foliar sprays and measuring of vegetative traits were done on non-bearing trees in 2016 and 2017. Reproductive traits evaluated on bearing trees in 2017 and 2018. Results: Leaf number, width and length and internode length of current barberry shoots increased significantly. GA3 application significantly decreased by flower and fruit number, TSS/TA and anthocyanin content of fruit ...

Purpose: The objective of this study was to establish equations to estimate leaf area (LA) using ... more Purpose: The objective of this study was to establish equations to estimate leaf area (LA) using length (L), width (W), fresh weight (FW) and dry weight (DW), length × width (L×W), width/length (W/L) of cress leaves as a leafy vegetable and radish leaves as a root vegetable. Research method: An experiment was carried out under greenhouse conditions to study the relationship between leaf dimension and weight with LA of these two vegetable plants. Observed LA was obtained by an automatic measuring device and leaf dimensions were measured by a ruler. Regression analyses of LA versus L, W, FW, DW, L×W and W/L led several models that could be used for estimating the area of individual cress and radish leaves. Findings: A linear model employing FW as an independent variable [LA=0.295 (Fresh W.)+ 1.430] resulted the most accurate estimate (R2 = 0.912, RMSE = 1.52) of cress LA. For radish, a linear model using W as an independent variable [LA=22.50 (W) + 7.46] showed the most accuracy (R2 ...

Journal of Applied Horticulture, 2019

Leaf area information is required in various horticultural and physiological studies. Leaf area m... more Leaf area information is required in various horticultural and physiological studies. Leaf area measurements require easy, quick and possibly non-destructive methods. The objective of this study was to establish equations to estimate leaf area (LA) using length (L), width (W), fresh weight (FW) and dry weight (DW), length×width (L×W), length + width (L+W), width/length (W/L), length 2 (L 2 ) and width 2 (W 2 ) of cress (Lepidium sativum L.) leaves as a leafy vegetable and radish (Raphanus sativus L.) as a root vegetable. A soilcultured experiment was carried out in 2010 under greenhouse conditions to study relationship between leaf dimension and weight with LA of these two vegetable plants. Observed LA was obtained by an automatic measuring device and leaf dimensions were measured by a ruler. Regression analyses of LA versus L, W, FW, DW, L×W, L+W, W/L, L 2 and W 2 led several models that could be used for estimating the area of individual cress and radish leaves. A linear model employing FW as an independent variables [LA=0.295 (Fresh W.)+ 1.430] resulted in the most accurate estimate (R 2 = 0.912, RMSE = 1.52) of cress LA. For radish, a linear model using W as an independent variable [LA=22.50 (W) + 7.46] showed the most accuracy (R 2 = 0.874, RMSE = 11.26) estimating LA. Validation of the regression models showed that the correlation between measured and simulated values using these equations were quite acceptable (R 2 = 0.922, 0.876).

Effects of Soaking Temperature, Stratification, Potassium Nitrate and Gibberellic Acid on Seed Germination of Loquat Trees

Journal of Plant Nutrition, 2012

The present study was carried out to increase loquat seed germination with treatments consisting ... more The present study was carried out to increase loquat seed germination with treatments consisting of two soaking temperatures (24 ± 2°C and 38 ± 2°C), chemical agents [control, 0.5% potassium nitrate (KNO3) and 250 mgL gibberellic acid (GA3) each for 20 h], and different moist chilling (MC) periods (1, 2, 3 and 4 weeks under 4–5°C). Compared with 24 ± 2°C, soaking

Fruits, 2009

Introduction. Probably because pomegranate trees are established in orchards as own-rooted plants... more Introduction. Probably because pomegranate trees are established in orchards as own-rooted plants, there are no studies regarding scion-rootstock combination effects on growth, tree size, yield and fruit quality of this fruit tree. Thus, the main aims of our experiment were to study the effects of some pomegranate rootstocks on growth and yield characteristics of Iranian commercial cultivars used as scions. Materials and methods. Our research was carried out between the 1999 and 2007 growing seasons at a collection of 760 pomegranate cultivars in the Yazd Province of Iran. Rootstocks were provided via clonal propagation using stem cuttings similar in height, diameter and age (2 years old) from 'Golnar Farsi', 'Torsh Ma' moly Zabol', 'Yek Killoy Hoshak Saravan', 'Poost Syah', 'Khafri Poost Sefid Jahrom', 'Zagh', 'Shavar' and 'Malas Esfahani'. Budding materials were provided from fruit-bearing trees in good vigor, using buds on current season growth of the 'Zagh', 'Shavar' and 'Malas Esfahani' pomegranate cultivars. Effects of the scion-rootstock combinations were investigated on tree size, vigor and yield of pomegranate. Results. The data indicated that grafting led to higher yield than the own-rooted plants, but grafted trees showed lower vigor and tree size compared with ungrafted trees. Application of 'Torsh Ma' moly Zabol' as a rootstock led to the lowest tree size and height, and the lowest rate of sunburn scald disorder. The highest yield and the lowest sucker production were obtained in plants grafted on 'Golnar Farsi' rootstock. Conclusion. Our results suggest that application of 'Torsh Ma' moly Zabol' as a rootstock can be useful to establish a high-density plantation. Iran Islamic Republic / Punica granatum / rootstocks / scions / variety trials / yields / vigor Effets de différentes combinaisons de scion/porte-greffe sur la vigueur, la taille de l'arbre, son rendement, et la qualité du fruit de trois cultivars de grenadier iranien. Résumé --Introduction. C'est probablement parce que les grenadiers sont établis en vergers à partir de plantes simplement racinées qu'il n'a été publié aucun rapport sur les effets de la combinaison scion/porte-greffe sur la croissance, la taille de l'arbre, le rendement et la qualité du fruit de cet arbre fruitier. De ce fait, les principaux objectifs de notre expérimentation ont été d'étudier les effets de quelques porte-greffes de grenadiers sur des caractéristiques de croissance et de rendement de cultivars iraniens utilisés comme scions. Matériel et méthodes. Nos recherches ont été effectuées entre les périodes de production de 1999 et 2007 dans une collection de 760 cultivars de grenadiers de la province de Yazd en Iran. Les porte-greffes ont été obtenus par multiplication clonale à partir de boutures de dimension, diamètre et âge (2 ans) semblables, prélevées sur les cultivars « Golnar Farsi », « Torsh Ma' moly Zabol », « Yek Killoy Hoshak Saravan », « Poost Syah », « Khafri Poost Sefid Jahrom », « Zagh », « Shavar » et « Malas Esfahani ». Les scions ont été constitués par des boutures de l'année prélevées sur des arbres vigoureux et productifs appartenant aux cultivars de grenadiers « Zagh », « Shavar » et « Malas Esfahani ». Les effets de la combinaison scion/porte-greffe ont été étudiés sur la taille, la vigueur et le rendement des grenadiers greffés. Résultats. Nos résultats ont montré que les arbres greffés produisaient un meilleur rendement que les arbres racinés, mais que la greffe induisait une taille et une vigueur des arbres inférieures à celles des arbres non greffés. L'utilisation de « Torsh Ma' moly Zabol » comme portegreffe a conduit à la plus basse taille des arbres, et à moins de coups de soleil. Le rendement le plus élevé et la plus basse production de pousses ont été obtenus par les plantes greffées sur le cultivar « Golnar Farsi ». Conclusion. Nos résultats suggèrent que « Torsh Ma' moly Zabol » pourrait être utilement utilisé comme porte-greffe pour établir une plantation à haute densité.

Fruits, 2009

Calcium effects on changes in chlorophyll contents, dry weight and micronutrients of strawberry (... more Calcium effects on changes in chlorophyll contents, dry weight and micronutrients of strawberry (Fragaria × ananassa Duch.) plants under salt-stress conditions. Abstract-Introduction. Today, approximately one-third of the world's irrigated lands suffer some degree of salinity. Although there are several reports about the effects of calcium treatments on strawberry growth and development under saline conditions, there are no reports demonstrating the effect on micronutrient concentrations of strawberry due to supplementary calcium applied to the saltstressed plants. Consequently, we investigated the effects of high salinity levels, with application of supplementary calcium, on chlorophyll contents, dry weight and micronutrients of strawberry. Materials and methods. Strawberry (Fragaria × ananassa Duch.) plants cv. 'Selva' were grown in hydroponic culture in a heated greenhouse to investigate the effectiveness of calcium (Ca) added to nutrient solution applied to plants. Six treatments were applied: nutrient solution alone (= [N]); [N] + NaCl salt (35 mM) (= [NS]); [NS] + CaCl 2 (5 mM); [NS] + CaCl 2 (10 mM); [NS] + CaSO 4 (5 mM); and [NS] + CaSO 4 (10 mM). The effect of calcium (different forms and different concentrations) on chlorophyll contents and dry weight of salt-stressed plants was determined. Additionally, micronutrient contents were studied. Results. The results indicated that chlorophyll contents and plant dry weight were decreased by salinity. NaCl application increased Cu, Zn, Mn and Fe concentrations of root parts. In shoot parts, Cu accumulation decreased, while other elements increased. Supplementary calcium could ameliorate the negative effects of salinity on chlorophyll and dry mass production. However, micronutrient concentrations of plant parts as influenced by calcium had contradictory results: calcium induced high levels of zinc, manganese and iron concentrations in roots, but high levels of copper and zinc concentrations in shoots. Moreover, there were significant differences between calcium forms in their actions. Conclusion. Our results suggest that CaSO 4 could be applied to improve the growth of salt-stressed strawberry plants. Iran Islamic Republic / Fragaria ananassa / salt tolerance / chlorophylls / dry matter content / mineral content Effets du calcium sur la teneur en chlorophylle, le poids sec et les oligoéléments du fraisier (Fragaria × ananassa Duch.) en condition de stress salin. Résumé-Introduction. Aujourd'hui, près d'un tiers des terres irriguées du monde souffrent d'un certain degré de salinité. S'il existe plusieurs rapports sur les effets du calcium sur la croissance et le développement du fraisier en conditions salines, il n'y rien sur l'effet du calcium sur les concentrations en oligoélément de fraisiers cultivés en présence de NaCl. En conséquence, nous avons étudié les effets d'un niveau élevé de salinité combiné avec l'application de calcium supplémentaire, sur les teneurs en chlorophylle, en poids secs et en oligoéléments du fraisier. Matériel et méthodes. Des plants de fraisiers (Fragaria × ananassa Duch.) cv. Selva ont été suivis sous culture hydroponique en serre chaude pour étudier l'efficacité de l'ajout de calcium (Ca) dans la solution nutritive apportée aux plantes. Six traitements ont été appliqués : solution nutritive seule (= [N]) ; [N] + sel de NaCl (35 mM) (= [NS]) ; [NS] + CaCl 2 (5 mM) ; [NS] + CaCl 2 (10 mM) ; [NS] + CaSO 4 (5 mM) ; [NS] + CaSO 4 (10 mM). L'effet du calcium (sous différentes formes et à différentes concentrations) a été déterminé sur le contenu en chlorophylle et le poids sec des plantes stressées. La teneur en oligoéléments des plantes a également été étudiée. Résultats. Nos résultats ont indiqué que la teneur en chlorophylle et le poids sec des plantes étaient diminués par la salinité. L'application de NaCl a augmenté des concentrations en Cu, Zn, Mn et Fe dans les racines. Les teneurs en Cu ont diminué dans la tige, alors que les autres éléments étudiés ont augmenté. L'ajout de calcium a pu compenser les effets négatifs de la salinité sur la teneur en chlorophylle et la production de matière sèche. Cependant, les effets de l'ajout de calcium sur les concentrations en oligoélément dans la plante ont été divers : un niveau élevé a été induit par le calcium pour les concentrations en Zn, en Mn et Fe dans les racines, alors que, dans la tige, ce sont les concentrations en Cu et en Zn qui ont été augmentées. De plus, ces différences ont été significatives. Conclusion. Nos résultats suggèrent que le sulfate de calcium (CaSO 4) pourrait être appliqué avec succès pour améliorer la croissance des fraisiers soumis à un stress salin. Iran République islamique / Fragaria ananassa / tolérance au sel / chlorophylle / teneur en matière sèche / teneur en éléments minéraux

Effects of Calcium Forms on Electrolyte Leakage, Total Nitrogen, Yield and Biomass Production by Strawberry Plants Under Nacl Salinity

Strawberry (Fragaria ananassa Duch.) plants cv. Selva was grown in soilless culture under greenho... more Strawberry (Fragaria ananassa Duch.) plants cv. Selva was grown in soilless culture under greenhouse conditions to present the effects of application of supplementary calcium combined with nutrient solution on plants grown under NaCl (35 mmol) salinity. Treatments: (1) Commercial nutrient solution or control; (2) the addition of NaCl (35 mmol); (3) NaCl (35 mmol) + CaCl 2 (5 mmol); (4) NaCl (35 mmol) + CaCl