Gibberellins application timing modulates growth, physiology, and quality characteristics of two onion (Allium cepa L.) cultivars (original) (raw)
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Influence on growth and yield of shallot onion (Allium cepa L.) by application of gibberellic acid
Tropical Agriculture, 2023
The study was conducted to determine the effect of gibberellic acid (GA3) at different concentrations (25, 50, 75, 100 and 125 ppm) on the growth and yield of shallot (Allium cepa L., aggregatum group, Batanes variety). The different concentrations were sprayed separately at 36 and 56 days after planting (DAP). Generally, the application of GA3 improved plant height and number of leaves per hill. Higher than 50 ppm did not increase the number of leaves and plant height of shallots at 45 DAP. Farmers can follow this for the green onion production at this harvesting period and concentration. Higher than 75 ppm resulted in delaying the maturity of the shallots, whereas zero application of GA3 entailed earlier harvesting. Bulb mass and bulb diameter were higher at 50 ppm and further concentration increase did not significantly increase its weight and diameter. These results suggest that GA3 at 50 ppm could enhance yield for green and bulb shallots using the application method described.
Sains Malaysiana
The mitigative effect of gibberellic acid (GA3) for salt (NaCl) stresses on seed germination attributes of onion (Allium cepa L.) cultivar Nasarpuri was assessed. Seeds were moisturized with NaCl (0-, 100- and 200-mM) and GA3 (250 ppm) before and after sowing for seed germination in 1st week than in 2nd week, GA3 sprayed once foliarly and NaCl in rooting region. At the end of 1st week, an increase in seed germination rate was observed in seeds supplemented with GA3 from control (85.0%) to 97.5% and from NaCl stressed seeds (72.5% and 50.0%) to 85.0% and 62.5%, respectively (p ≤ 0.05). This reduction in seed germination was caused by salt stresses after 96th hours of sowing, inhibition in GA3-biosynthesis GA3 and delay in α-amylases activation observed in salt stressed seed cultures. The seedling vigor index (SVI) was observed higher in foliarly GA3 sprayed cultures of both control as well as saline stressed cultures. The seedlings supplemented with GA3, decrease in malondialdehyde (...
Effects of Gibberellic Acid (GA3) on Breaking Dormancy In Garlic (Allium Sativum L.)
Small
An experiment was carried out with Gibberellic Acid (GA 3) to evaluate its effects on the sprouting and early growth behavior of a local and an exotic cultivar of garlic. The aim of the experiment was to investigate possible ways to overcome the problem of dormancy in garlic. The local cultivar exhibited marked influence of GA 3 on sprouting of cloves, number of leaves /plantlet, plantlet height, number of roots /plantlet, root length and percentage of normal plantlets. The 250 ppm concentration of GA 3 gave the maximum sprouting (31.67%) whereas the 500 ppm concentration produced the minimum sprouting (10.00%). The exotic cultivar completely failed to sprout. The results revealed that application of GA 3 has the potentiality to break dormancy and accelerates the sprouting in the local cultivar of garlic.
Bhartiya Krishi Anusandhan Patrika, Volume 39 Issue 3-4 (September-December 2024) : 306-311, 2024
Background: The present study was conducted in field Experimentation Centre and Seed Testing Laboratory of Department of Genetics and Plant Breeding, Naini Agricultural Institute, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj (Uttar Pradesh) during Kharif 2023-2024. Methods: The soil of experimental plot was sandy loam in texture, nearly neutral in soil reaction (pH 7.1), low in organic carbon (0.36 %), available N (171.48 kg/ha), available P (15.2 kg/ha) and available K (232.5 kg/ha). The experiment was laid out in randomized block design with eight treatments including control which were replicated thrice. Result: The results revealed that plant height (213.53 cm), days to 50% flowering (93.67 DAS), days to maturity (123.67 DAS), flag leaf length (37.83 cm), flag leaf width (top) (0.56 cm), flag leaf width (middle) (1.04 cm), flag leaf width (bottom) (1.02 cm), number of tillers (22.63), total productive tillers (18.29), panicle length (32.76 cm), seed yield per plot (35.84 g), test weight (25.87 g), spikelets per panicle (81.43), biological yield (142.84 g) were recorded significantly higher in treatment (T5) followed by T4. The study conducted in seed testing laboratory revealed that germination percent (93.67%), root length (13.84 cm), shoot length (13.67 cm), seedling length (27.51 cm), seedling fresh weight (1.15 g), seedling dry weight (0.28 g), seedling vigor index I (2576.88), seedling vigor index II (25.75) were observed significantly higher in treatment (T5) followed by T4. It was concluded from the study that treatment T5- gibberellic acid (125 PPM) recorded significantly higher physiological, yield parameters and biochemical parameters.
Role of gibberellic acid on growth, yield and quality of tomato: A Review
International Journal of Chemical Studies, 2017
Plant growth regulators (also called plant hormones) are numerous chemical substances that profoundly influence the growth and differentiation of plant cells, tissues and organs. Plant growth regulators function as chemical messengers for intercellular communication. In tomato, different growth regulators play a pivotal role in germination, root development, branching, flower initiation, fruiting, lycopene development, synchronization and early maturation, parthenocarpic fruit development, ripening, TSS, acidity, seed production etcetera. To boost the tomato production in India these versatile resources greatly help the professionals and researchers. By keeping the importance of growth regulator in tomato production this review paper is scripted.
African Journal of Agricultural Research, 2013
An experiment was performed to evaluate the effect of gibberellic acid (GA 3) on seed size and sprouting of potato (Solanum tuberosum L.). The experiment was laid done in factorial design (3 × 3) using Agria, Marfona and Draga cultivars and three concentrations of GA 3 (0, 5 and 10 mg/lit). Results showed that application of gibberellic acid at low concentrations (5 and 10 mg/lit) was able to increase general performance and productivity of seed tubers of potatoes. Seed tuber production was increased by application of using gibberellic acid in all cultivars. Total weight of seed tubers produced by application of 5 mg/lit GA 3 was statistically different compared to control (p ≤ 0.05). Also, results showed that after one week from application of GA 3 , starch content decreased and total content of sugar increased in potato tuber. The tubers treated with GA 3 sprouted earlier while in control sprouting was very late and slow. Furthermore, we indicated that sugar content is one of the important parameters determining the sprouting of seed potatoes. Thus the sequence of events can be summarized as: Application of GA 3 → Starch hydrolysis → Decrease of starch content of tubers → Production and increase of total sugar content → Dormancy breaking → Tuber sprouting.
Evaluation of Bioeffectiveness and Phytotoxicity of Gibberellic Acid on Chilli
The investigation was carried out at C-Block farm, kalyani, Bidhan Chandra Krishi Viswavidyalaya during 2015-16 in chilli cv. Beldanga to study the effect of gibberellic acid on growth and yield parameters in chilli. During seedling stage, roots are dipped with different concentrations (0, 10 and 20 ppm) of gibberellic acid and transplanted, which were further sprayed with GA3 of three more concentrations (20, 30 and 40ppm) at flowering stage. The experiment was laid out in RBD with three replication. Among different treatments maximum plant height (73.47cm), plant spread (67.47cm in East-West and 67.67 cm in North-South) and number of primary branches (9.13) at 150DAP was found with 20 ppm seedling dip and 30ppm foliar spray. In respect to the yield parameters, maximum yield (181.37 g/plant) and maximum fruit set per cent (34.61) was observed in 10 ppm seedling dip and 40 ppm foliar spray (34.61) followed by 20 ppm seedling dip-30 ppm foliar spray (34.17). Early fruit maturity (40.33 days), maximum number of fruits (87.80), fruit length (72.73 mm) and fruit width (35 mm) was observed in the plants treated with 20 ppm seedling dip and 30 ppm foliar spray. best yield was obtained from the plots sprayed with 10 ppm seedling dip with 40 ppm foliar spray, 20 ppm seedling dip with 20 ppm foliar spray and 20 ppm seedling dip with 30 ppm foliar spray.
Influence of Gibberellic Acid on Fruit Crops: A Review
International Journal of Environment and Climate Change
Gibberellic acid is a tetracyclic di-terpenoid molecule that acts as a plant hormone by promoting the growth and development of plants. Gibberellins, one of the longest-known groups of plant hormones, control several developmental and signaling processes, such as stem lengthening, germination, dormancy, flowering and floral development, as well as the senescence of leaves and fruits. Gibberellins can alter physiological and developmental processes, including plant vegetative growth, sex expression, yield, and yield components in several crops, when applied foliar. Gibberellin, therefore has significant economic and industrial significance. Their exogenous use aids in enhancing the several commercially significant and marketable traits of flowering plants and has several benefits, like being environmentally friendly and taking less time to treat the plant. Growth regulators like GA3 have finally impacted on flowering crops' physiological processes, which in turn has affected grow...
Journal of Agricultural Science, 2019
The growth regulators from gibberellins, when applied on plants, might improve physic and physiological features, stimulate cell division and elongation, this study aimed at evaluating the influence of gibberellic acid doses applied exogenously on bean crop through seed treatment, and analyzing its effects on morphological attributes of seedlings and physiological quality of the seeds produced. The experimental design was completely randomized design, with treatments corresponding to the doses: zero (distilled water only), 50, 100 and 200 mg L-1, arranged in four replicates. The use of gibberellic acid in bean seeds did not result in changes on the number of leaves, leaf area, dry mass of leaves and stem. Applications of foliar gibberellic acid potentiated stem height and root dry mass of seedlings.