Improvement and breeding
M. Naghizadeh; R. Kabiri; K. Maghsoudi
Abstract
Ascorbic acid and melatonin as the biostimulants affect the biosynthesis of phytohormones, facilitate and increase the nutrients uptake, enhance the defense mechanisms, stimulate the root growth, and finally, increase the quality and quantity of the product by affecting the plant metabolites. This study ...
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Ascorbic acid and melatonin as the biostimulants affect the biosynthesis of phytohormones, facilitate and increase the nutrients uptake, enhance the defense mechanisms, stimulate the root growth, and finally, increase the quality and quantity of the product by affecting the plant metabolites. This study was conducted in a randomized complete block design with three replications to investigate the effects of foliar application of melatonin and ascorbic acid on the grain yield and mucilage content of Plantago ovata Forssk. in the research greenhouse of Bardsir Faculty of Agriculture, Shahid Bahonar University of Kerman in 2020. The experimental treatments included the foliar application of distilled water (control), melatonin 100 μM, ascorbic acid 100 μM, and melatonin 100 μM + ascorbic acid 100 μM. The foliar application treatments continued from the time of complete establishment of seedlings (3-4 leaves) to the physiological maturity stage of seeds (four times every two weeks). The results showed that the foliar application of melatonin and ascorbic acid (single and combined application) enhanced the number of tillers per plant, number of spikes per plant, spike length, number of seeds per spike, and 1000-seed weight significantly. The highest grain yield was obtained from the foliar application of melatonin (59.98 g.m-2) and melatonin + ascorbic acid (61.85 g.m-2) without statistically significant differences with each other. The ascorbic acid foliar application also significantly increased the grain yield by 6.61% compared to the control. The foliar application of ascorbic acid, melatonin, and melatonin + ascorbic acid increased the mucilage content by 12.29, 19.89, and 23.80%, respectively compared to the control. The application of melatonin alone or in combination with the ascorbic acid, without statistically significant differences with each other, had the greatest positive effect on increasing the mucilage percentage. The mucilage yield was obtained 10.03, 13.47, 14.94, and 15.64 g.m-2 in the control, ascorbic acid, melatonin, and melatonin + ascorbic acid treatments, respectively. Based on the results, it can be concluded that the foliar application of melatonin and ascorbic acid could improve the quantitative and qualitative yield of P. ovata, and among the treatments their combined application was more effective.
A. Bidmeshki; M.J. Arvin; K. Maghsoudi
Abstract
Drought stress is the most important factor which negatively affects the plant growth and crop productivity in arid and semi-arid areas. The main problem which Iranian farmers are faced with cultivation of garlic (Allium sativum L.) is low production efficiency and performance. Therefore, in a field ...
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Drought stress is the most important factor which negatively affects the plant growth and crop productivity in arid and semi-arid areas. The main problem which Iranian farmers are faced with cultivation of garlic (Allium sativum L.) is low production efficiency and performance. Therefore, in a field experiment, the effect of IBA (0 and 100 ppm) was studied on growth parameters, bulb yield and allicin content of a local garlic cultivar under water deficit conditions (40% reduction of available water) in 2010 in Jiroft. The results showed that drought stress significantly reduced chlorophylls (a, b and total), caretenoids, anthocyanins, bulb and allicin yield, plant fresh weight, root fresh weight and also increased ion leakage. However, it had no significant effects on the percentage of allicin. In contrast, under non-stress conditions, IBA significantly improved most recorded parameters and reduced ion leakage and amount of anthocyanins while it had no effect on product quality and quantity under water deficit conditions. Compared with the controls, IBA increased plant fresh weight, bulb yield, and allicin respectively by 30%, 19% and 25%.
L. Ebrahimzadeh Sarvestani; M.J. Arvin; K. Maghsoudi
Abstract
Field studies were conducted over two growing seasons to study the effects of foliar application of cycocel (CCC) at early growth stage on grain yield and its components of (Carthamus tinctorius L.) cv. Isfahan, at Agricultural Research Station of Kerman University, using randomized complete block design ...
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Field studies were conducted over two growing seasons to study the effects of foliar application of cycocel (CCC) at early growth stage on grain yield and its components of (Carthamus tinctorius L.) cv. Isfahan, at Agricultural Research Station of Kerman University, using randomized complete block design with three replications. In the first year, the effects of 0, 1000 and 2000 mgL-1 was studied. Compared with control treatment, CCC had no effects on stem diameter and length, but significantly increased total branches, leaf number, flower head biomass, flower head number, 1000-grain weight, seed yield and biological biomass, with no effect on seed oil, seed protein percentage and harvesting index. In the second year, the effects of 0, 1000, 2000, 3000 and 4000 mgL-1 was studied. Compared with control treatment, cycocel up to 3000 mgL-1 increased total and lateral branches, flower head number, flower head biomass, 1000-grain weight, grain yield and biological biomass. In some cases, 3000 mgL-1 CCC was more effective than other concentrations. However, it can be concluded that, 1000 mg/lit cycocel applied at early growth stage significantly increases grains in safflower.
