Saeid Zehtab-Salmasi - Academia.edu (original) (raw)

Papers by Saeid Zehtab-Salmasi

AFRICAN JOURNAL OF BIOTECHNOLOGY, 2011

Rooting characteristics significantly affect the water-use patterns and acquirement of nutrient f... more Rooting characteristics significantly affect the water-use patterns and acquirement of nutrient for any plant species. Plant growth promoting rhizobacteria improve the plant growth by a variety of ways like the production of phytohormones, nitrogen fixation, phosphate solubilization and improvement in root morphology etc, and are also useful in cutting down the cost of chemical fertilizers. The present investigation was carried out to determine the comparative effect of plant growth promoting rhizobacteria (PGPR), Azospirillum brasilense, Azotobacter vinelandii and Pseudomonas stutzeri, either alone or in combination with different doses of chemical fertilizers [full dose (Urea at 60 kg ha-1 and DAP at 30 kg ha-1), half dose (Urea 30 kg ha-1 and DAP 15 kg ha-1) and quarter dose (Urea 15 kg ha-1 and DAP 7.5 kg ha-1)] on root morphology and root distribution pattern of safflower (Carthamus tinctorius L.) viz. cvv. Thori and Saif-32 in the soil. The PGPR were applied as seed inoculation at 10 6 cells/ml prior to sowing. P. stutzeri either alone or in combination with full dose of chemical fertilizers, was highly effective in increasing the root area in cv. Saif-32, whereas, the percent increase due to A. brasilense was comparable to that of treatment with full dose of chemical fertilizers. P. stutzeri inoculation resulted in significantly higher root length in both the cultivars. Significantly, higher root width (54%) of cv. Thori was observed in treatment receiving inoculation with A. vinelandii and supplemented with half dose of chemical fertilizers, whereas maximum root width of cv. Saif-32 was recorded in treatment supplemented with half dose of chemical fertilizers. It is inferred that PGPR inoculation especially those of A. brasilense and P. stutzeri either alone and more so in combination with half dose of chemical fertilizers, are highly effective in improving root morphology and growth in safflower.

International Journal of Biosciences (IJB), Feb 7, 2015

Intercropping is the practice of producing multiple crops in a given space. In this research bers... more Intercropping is the practice of producing multiple crops in a given space. In this research berseem clover and dill were intercropped at different additive series (100:25, 100:50 and 100:75) at the Research Farm of the Faculty of Agriculture, University of Tabriz, Iran. Field experiment was arranged as split plot based on randomized complete block design with three replicates. Dill umbels were harvested at flowering, dough development and complete ripening stages. Results showed that among harvesting times, dough development stage and among intercropping patterns, 100:50 treatment had the highest essential oil percentage, essential oil yield and harvest index of essential oil. Berseem clover as a forage and legume crop promotes dill essential oil production and could be an effective plant in intercropping systems with essential oil bearing medicinal plants such as dill.

Journal of Medicinal Plants Studies

Philippine Journal of Crop Science, 2018

Journal of Medicinal Plants Studies, 2016

This research was carried out in 2012 and 2013 to investigate the effects of seed priming and sup... more This research was carried out in 2012 and 2013 to investigate the effects of seed priming and supplementary irrigation on yield and yield component of Lallemantia iberica. Two experiments were arranged as factorial based on randomized complete block design (RCBD) with three replications. Seed priming methods were control, hydro-priming, salt-priming and irradiation with two doses of gamma rays (200 and 400 Gy) and irrigation treatments were rain-fed (I1), irrigation at flowering stage (I2) and irrigation at both flowering and grain filling stages (I3). Plant establishment, grain number per plant, hundred grain weight, biological yield, grain yield and harvest index were evaluated. Results showed that hydro-priming increased plant establishment, but the differences between control, hydro-priming and KNO3 priming was not significant. Moreover, differences in harvest index among control, hydro-priming and KNO3 priming were not significant. Plant Establishment and harvest index were decreased by gamma irradiation of seeds. Plants from hydro-primed seeds produced the highest number of grains per plant. Hundred grain weight was enhanced by hydro-priming and gamma irradiation (200 Gy) under I3 and gamma irradiation (400 Gy) under all irrigation treatments, compared with non-priming. Biological yield was improved by hydro-priming under I2 and I3 and gamma irradiation (200 Gy) under I3. The highest grain yield per unit area was recorded for plants from hydro-primed seeds under I2 and I3 followed by plants from unprimed seeds under I2. Since hydro-priming of Lallemantia iberica seeds due to mucilage content is difficult, cultivation of non-primed seeds with a supplementary irrigation at flowering stage could produce satisfactory yield.

In recent decades, water deficit and environmental hazards of wastewater have promoted the develo... more In recent decades, water deficit and environmental hazards of wastewater have promoted the development of wastewater reuse in irrigation of agricultural lands in many arid and semi-arid regions. An experiment was conducted out at the experimental farm of a leaven factory (Iran Mayeh Co.), where the effect of treated wastewater on grain yield and quality of corn (Zea mays) was evaluated during the growing season of 2012. Three, irrigation levels (I1: irrigation with wastewater once in whole experimental period, I2: irrigation with wastewater twice in whole experimental period, I3: irrigation with wastewater in whole experimental period) and six wastewater percentage levels (C1: 15% wastewater, C2: 30% wastewater, C3: 45% wastewater, C4: 60% wastewater, A: pure water and P: pure wastewater) were studied in a factorial experiment on the bases of randomized complete block design with three replications. Results illustrated that number of irrigation with wastewater did not have significant effect on protein content, oil content of grains and leaf chlorophyll whereas it had significant effect on 1000-seeds weight, grain yield and harvest index. Also results showed that wastewater percentage did not have significant effect on mentioned traits. The maximum increase of grain yield was observed in irrigation with wastewater whole over growth season. Highest level of oil content was obtained from irrigation with wastewater once in whole experimental period × 60% wastewater treatment. Therefore, it seems that after assessing the effects on soil and environment, the wastewater of this leaven factory can be used in corn irrigation. * Corresponding Author: Ata Bahojb-Almasi  Ataalmasi@yahoo.com

Salinity is one of the major abiotic stresses that adversely affect crop productivity and quality... more Salinity is one of the major abiotic stresses that adversely affect crop productivity and quality in many arid and semi-arid parts of the world. Effects of four levels of salinity (0, 4, 8 and 12 dS m-1 NaCl) on performance of three pinto bean cultivars (COS16, Talash and Khomain) were investigated in 2010. A factorial experiment based on randomized complete block design with three replications was carried out at the Greenhouse of University of Tabriz, Iran. Ten seeds were sown in each pot filled with 900 g perlite. After emergence, seedlings were thinned and 4 plants were kept in each pot. Results indicated that At the most stages of development, leaf chlorophyll content index (CCI) under severe salinity (12 dS m-1) was lower than that under other saline and non-saline conditions. Proline accumulation in leaf tissues increased gradually with the increase of salinity up to 8 dS m-1 and thereafter slightly decreased. The highest CCI and proline content were found in Talash compared with other cultivars. Root/shoot ratio of COS16 was higher than that of Talash and Khomain. Flowering and podding were delayed under moderate and severe salinities, but grain yield decreased as salinity increased. The highest and the lowest grain yield per plant were obtained from Khomain and COS16, respectively. However, differences in grain yield between Khomain and Talash and between Talash and COS16 were not statistically significant. It was concluded that pinto bean is a sensitive crop to salinity, but the extent of sensitivity differs among cultivars.

Iranian Journal of Field Crop Science, 2018

African Journal of Agricultural Research, May 31, 2010

Laboratory tests and a field experiment were carried out to evaluate the effects of salt priming ... more Laboratory tests and a field experiment were carried out to evaluate the effects of salt priming (0.8% NaCl with electrical conductivity of 15.3 dsm-1 and 0.8% KNO 3 with electrical conductivity of 12.5 dsm-1 for 8 h at 20 ± 1°C) on seed invigoration and field performance of three winter rapeseed cultivars (Okapi, Opera and Talayeh). The field experiment was arranged as split plot factorial based on RCB design in three replicates, with irrigation regimes (I1, I2 and I3: irrigation after 80, 120 and 160 mm evaporation from class A pan) in main plots and cultivars and salt priming treatments in sub-plots. Salt priming, particularly KNO 3 priming, decreased mean germination time and increased seedling size, compared with non-primed seeds. Irrigation treatments had no significant effect on yield and yield components of rapeseed cultivars in the field, suggesting that this crop was well-performed even under the limited irrigation regimes. Although response to salt priming varied among rapeseed cultivars, seed priming generally increased grain yield per unit area through enhancing rate and percentage of seedling establishment, pods per plant and grains per plant. The highest improvement in grain yield per unit area was observed for seeds primed with KNO 3 (31.5%) followed by those primed with NaCl (22.5%).

Journal of Medicinal Plants Research, Jun 18, 2011

The effect of water stress, excess water and water deficit, on the leaf relative water, amounts o... more The effect of water stress, excess water and water deficit, on the leaf relative water, amounts of proline, water soluble sugars and total chlorophyll and chlorophyll a, b were examined, to characterize the involvement of these components in the adaptive processes. An experiment was carried out with four irrigation levels (W1, W2, W3 and W4 consisting 100, 85, 70 and 55% of field capacity, respectively) arranged in randomized complete block design with five replications. Potted seedlings of Matricaria chamomilla were used as a test medicinal plant. Leaf relative water content, percentage of proline and total soluble sugar were not affected by irrigation regimes. But, irrigation had significant effect on amount of total chlorophyll and chlorophyll a, b. The maximum amount of chlorophyll a (19 mg/g), chlorophyll b (16 mg/g) and total chlorophyll (35 mg/g) obtained from W2 and W3. The minimum amount of chlorophyll a (15 mg/g), chlorophyll b (11 mg/g) and total chlorophyll (26 mg/g) obtained from W1, W4, W4, respectively. The values of total chlorophyll and chlorophyll a, b were the same in irrigation, at 100 and 55% of field capacity.

A split plot experiment (based on RCB design) with four replications was conducted in 2014, to ev... more A split plot experiment (based on RCB design) with four replications was conducted in 2014, to evaluate the effects of different irrigation treatments (I 1 , I 2 , I 3 and I 4 : irrigation after 70, 100, 130 and 160 mm evaporation, respectively) on essential oil content of dill (Anethum graveolens L.) organs in two genotypes (Local and Mammoth). Irrigation treatments and genotypes were allocated to the main and sub-plots, respectively. Essential oil percentage of dill organs increased, but their essence yield decreased as water deficit severed. Mammoth had the highest essential oil percentage in all organs, but essential oil yield of vegetative organs and flowers of the local genotype was much more than that of mammoth genotype. However, the difference in essence yield of seeds between two genotypes was not significant. The highest essential oil percentage and yield under all irrigation intervals were obtained from seeds, followed by flowers and vegetative organs. It was concluded t...

Acta Scientiarum Polonorum Hortorum Cultus, 2019

To investigate the changes in selected morphological traits and yield of coriander (Coriandrum sa... more To investigate the changes in selected morphological traits and yield of coriander (Coriandrum sati- vum L.) in response to fertilization and salicylic acid foliar spraying under different irrigation intervals, two field experiments were conducted as split-factorial based on randomized complete block design with three replicates in 2014 and 2015. Treatments were three irrigation intervals (irrigation after 60, 90 and 120 mm evaporation from class A pan) and combination of fertilization (control, urea 100 kg ha–1, Nitrokara (bio-fertilizer), and 50% urea + Nitrokara) and salicylic acid (0 and 1 mM) that were allocated to the main and sub-plots, respectively. The results showed that plant height, length of the longest internode, stem diameter, branches per plant, dry weights of roots and leaves and fruit yield of coriander were reduced and root length enhanced with increasing the irrigation intervals. However, all of the nitrogen fertilizers, especially combined application of 50% ure...

Notulae Scientia Biologicae, 2010

In order to definite growth stages of Matricaria chamomilla L., 40 plants were planted with 200 ×... more In order to definite growth stages of Matricaria chamomilla L., 40 plants were planted with 200 × 200 cm distance from each other. To determine the phenology under different water stress condition and plant densities, an experiment was conducted in factorial based on randomized complete block design with two factors including irrigation at 4 levels (25, 50, 75, and 100 mm evaporation from pan class A), and plant density at 5 levels (cultivation in 30 cm rows with 5, 10, 15, 20 and 25 cm intra-row spaces) with three replications.

A split plot experiment on the basis of randomized complete block design in three replicates was ... more A split plot experiment on the basis of randomized complete block design in three replicates was conducted to investigate changes in some morphological traits and grain yield of soybean (Glycine max L.). Treatments were irrigations (I 1 , I 2 , I 3 , I 4 : irrigation after 60, 90, 120 and 150 mm evaporation from class A pan, respectively) in main plots and light interceptions (S 1 , S 2 , S 3 : 25, 65 and 100% of sunlight) in sub-plots. Plant height was significantly reduced by severe water stress, compared to the well watered plants. In contrast, stem diameter increased by decreasing water deficit. Shading increased soybean plant height and decreased stem diameter. Although, leaves per plant and grain yield per unit area decreased with increasing shading under I 1 and I 2 , they were increased as light interception decreased under I 3 and I 4 . This is an advantage for shaded plants to enhance leaves per plant and grain yield per unit area under limited water availability.

Journal of Herbs, Spices & Medicinal Plants, 2011

A two-year factorial experiment was conducted in Randomized Complete Block Design to evaluate the... more A two-year factorial experiment was conducted in Randomized Complete Block Design to evaluate the effect of irrigation regimes on the yield of biomass, dried flower, essential oil and seed, and harvest index of dried flower, essential oil and seeds of German chamomile at different plant densities. Factors applied were irrigation regimes (irrigation at 25, 50, 75, and 100 mm evaporation from pan class A) and plant density (5, 10, 15, 20 and 25 cm intra-row spaces with 30 cm inter-row space) with three replications. Results showed the significant effect of irrigation and plant density on the yield and harvest index of dried flower, essential oil and biomass. The highest yield of dried flower (1,136 kg/ha) was obtained from irrigation at 50 mm evaporation from pan, followed by 75, 25 and 100 mm evaporation, respectively. The highest (7,474 g/ha) and lowest (5,812 g/ha) essential oil yield were obtained from irrigation at 50 and 100 mm evaporation, respectively. The greatest biomass (2,989 kg/ha) observed at 25 mm evaporation, as well as irrigation at 50 and 75 mm and the minimum (1,882kg/ha) was at 100 mm. The highest yield of dried flower (1,241 kg/ha), essential oil (8,057 g/ha), seed (765 kg/ha) and biomass (2,716kg/ha) were obtained from 10 cm intra-row distance, whereas the lowest yield of dried flower (765 kg/ha), essential oil (4,921 g/ha) and seed (574 kg/ha) observed at 25 cm distance. The minimum biomass (1,768 kg/ha) was obtained from 5 cm intra-row space. The maximum (39%) and minimum (33%) harvest index of dried flower were obtained from irrigation at 100 and 25 mm evaporation, while the highest (47%) and lowest (29%) harvest index belonged to 5 and 25 cm planting spaces, respectively. The largest and smallest harvest index of essential oil concerned to 5 (0.324%) and 25 cm (0.192%), respectively. Our finding showed that the best irrigation was irrigation at 50 mm evaporation from pan and the optimal plant distance was 10 cm intra-row space.

The effects of salt priming (0.8% NaCl with electrical conductivity of 15.3 dSm -1 and 0.8% KNO 3... more The effects of salt priming (0.8% NaCl with electrical conductivity of 15.3 dSm -1 and 0.8% KNO 3 with electrical conductivity of 12.5 dSm -1 for 8 hours at 20±1ºC) on field performance of three winter rapeseed cultivars (Okapi, Opera and Talayeh) were investigated in 2007-2008. The field experiment was arranged as split plot factorial based on RCB design in three replicates, with irrigation regimes (I 1 , I 2 and I 3 :irrigation after 80, 120 and 160 mm evaporation from class A pan) in main plots and cultivars and salt priming treatments in sub-plots. Salt priming, particularly KNO 3 priming, decreased mean germination time, compared with unprimed seeds. Irrigation treatments had no significant effect on field performance of rapeseed cultivars in the field, suggesting that this crop is well-adopted to irrigation intervals up to 160 mm evaporation from class A pan. Ground cover of Okapi was improved at early stages of growth by seed priming, but in general Talayeh had the highest gr...

Journal of Medicinal Plants and By-products (JMPB), 2020

It is important to investigate and develop the strategies and methodologies to maintain the susta... more It is important to investigate and develop the strategies and methodologies to maintain the sustainability of plant production. A two-year field study was performed to evaluate calendula response to individual form and also mixtures of selected bio organic fertilizers. The effects of co-inoculation of two plant growth promoting rhizobacteria (PGPR), humic acid (HA), vermicompost (VC), and combinations of these bio organics were investigated in two calendula cultivars, Isfahan multi petalled (MP) and single petalled (SP). The experimental design was a factorial randomized complete block with three replicates. Based on the combined analysis of two years, mean flower yield was highest for the MP cultivar treated by VC + PGPR. Flower essential oil was higher in the MP cultivar than the SP cultivar and did not vary with fertilizers. The highest harvest index of flowers obtained from the MP cultivar treated by HA + PGPR. Furthermore, nutrient contents of leaves increased by fertilizers and combined application of bio organics gave the highest values of nitrogen, phosphorus and potassium contents in calendula leaves. The present results indicate that the selected bio organic fertilizers can be used to obtain higher levels of quality and yield in sustainable agricultural practices.

International Journal of Agriculture and Crop Sciences (IJACS), 2013