The effect of Application of Cycocel on Morphophysiological and Biochemical Characteristics of Mung Bean (Vigna radiata L.) Genotypes under Water Deficit Conditions
Journal Title: Iranian Journal of Pulses Research - Year 2024, Vol 15, Issue 2
Abstract
IntroductionDrought is one of the most important abiotic stresses that has an undesirable effect on crop production and their quality and leads to osmotic, ionic, and nutritional limitations as well as growth delay, metabolic disorders and oxidative stress in plants. Iran has a dry and semi-arid climate. Due to this problem, there is a possibility of drought stress during the growth period of plants. Presently, the production of legumes in the country is mostly under rainfed conditions and drought stress is one of the main factors reducing the yield of legumes. Mung bean is a small grain of valuable legume. Evaluation of the performance of different cultivars is considered a starting point in identifying drought-resistant cultivars. Cycocel is one of the most important growth retarders for tampering with growth and performance. Therefore, the present study was conducted to investigate the effect of foliar application of cycocel on morphophysiological and biochemical characteristics of mung bean (Vigna radiata L.) genotypes under water deficit conditions. Materials and MethodsThis study was conducted in order to investigate the effect of foliar application of cycocel on the morpho-physiological and biochemical characteristics of mung bean (Vigna radiata L.) genotypes under water deficit conditions, split-split plots based on a randomized complete block design with three replications, in the research farm of Ferdowsi University of Mashhad. Experimental factors included 3 levels of drought (non-stress, mild stress, and severe stress), 3 levels of cycocel foliar spraying (0, 400, and 800 mg.l-1), and 2 levels of mung bean cultivars (Hendi landrace and Zarbakhsh). Statistical analysis was performed using SAS 9.4 and comparing the means was based on the LSD method at a 5% probability level. Results and DiscussionThe experimental results showed that the effect of drought stress, cycocel, genotype, and the interaction of drought stress and cycocel as well as drought stress and genotype on height, stem diameter, relative water content, stomatal conductance, leakage of electrolytes, greenness and chlorophyll content were significant. Severe stress, compared to non-stress conditions, caused a decrease in height (53%), stem diameter (30%), relative water leaf content (29%), stomatal conductance (68%), greenness (37%), chlorophyll a content (25%) and chlorophyll b content (30%) and leakage of electrolytes increased (60%). The results showed that both drought stress and cycocel caused a decrease in the height of the plant. At all levels of drought stress, the Hendi genotype had a higher plant height. Drought stress caused a decrease in the diameter of the stem, while the application of cycocel reduced the decrease in the diameter of the stem due to drought stress. Drought stress caused a decrease in the relative content of leaf water, while the application of cycocel reduced this decrease. Also, Drought stress reduced the stomatal conductance, while the application of cycocel slightly compensated this reduction. At all levels of drought stress, Zarbakhsh genotype had higher stomatal conductance, but the difference between the two genotypes in the treatment of non-stress was not significant. Drought stress increased the leakage of membrane electrolytes, and the use of cycocel reduced the increase in electrolyte leakage due to drought stress, and it was also found that the increase in electrolyte leakage due to drought stress was more intense in the Hendi genotype. Drought stress reduced the greenness of the leaf, while the application of cycocel slightly compensated this reduction. Also, at all levels of drought stress, the Zarbakhsh genotype had higher leaf greenness, but the difference between the two genotypes in the treatment of 100% crop water requirement was not significant. The chlorophyll a content of leaves decreased due to drought stress, while the application of cycocel reduced the severity of this decrease. Also, at all levels of drought stress, the Hendi genotype had lower leaf chlorophyll a content. ConclusionsThe results of this study showed that under drought stress, there was a decrease in plant height, stem diameter, relative water content, stomatal conductance, greenness, chlorophyll a and b content, along with an increase in electrolyte leakage. Among mung bean cultivars, the Zarbakhsh cultivar showed superiority in tolerance to water shortage conditions compared to another one. The use of cycocel reduced the negative effects of drought stress on the plant. It appeared that the use of cycocel under drought stress conditions is effective for improving plant performance.
Authors and Affiliations
Elahe Danaei Rad,Gholamreza Zamani,Hamid-Reza Fallahi,
Keywords
Related Articles
- EP ID EP751125
- DOI https://doi.org/10.22067/ijpr.2024.84927.1071
- Views 27
- Downloads 0
Evaluation of the Tolerance of Promising Genotype of Bean (Phaseolus vulgaris Linnaeus) to Two-Spotted Mite (Tetranychus urticae Koch (Acari: Tetranychidae)) in Field Conditions
IntroductionLegumes are one of the rich sources of plant protein after cereals and the second most important food source for humans. The most important biotic stresses that lead to reduced growth, performance, and someti...
Evaluation of yield components, yield and competitive power of chickpea cultivars under weed interference
IntroductionWeeds are among the main limiting factors in agriculture. In fact, the problem of weeds is a basic problem in farms, which can lead to major yield loss. Weeds can decrease soil nutrients and threaten crops by...
Use of seaweed )Ascophyllum nodosum) extract in mitigating the negative effects of water deficit stress in chickpea by evaluating morphophysiological indicators
IntroductionSeaweed (Ascophyllum nodosum) extract can play an effective role in plant growth and development due to having plenty of nutrients, plant growth regulators and helpful microorganisms can improve soil physicoc...
Response of Guar (Cyamopsis tetragonoloba L.) to Planting Date and Row Spacing in Jiroft
IntroductionThe highest concentration of protein is found in plant-based sources, whereas animal protein production tends to be more challenging and costly compared to plant-derived proteins. Within plant sources, legume...
Effect of seed pre-treatment with biological and chemical agents and herbicide application on growth and yield of dry bean (Phaseolus vulgaris L.) landrace
IntroductionAmong three market class of bean (Phaseolus vulgaris L.) landrace in Guilan province, black streaked (Ojo de Cabra) has the highest cultivated area. This type of bean is a determinate bush with purple flower...