INTERNATIONAL JOURNAL OF MODERN AGRICULTURE ISSN 2305-7246

 

 

 

 

 

 

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International Journal of Modern Agriculture ISSN 2305-7246

 

 

 

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Drought tolerance of cowpea enhanced by exogenous application of methyl jasmonate

 

Omid Sadeghipour*

 

Department of Agronomy, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, 18155/144, Tehran, Iran.

*Corresponding author (e-mail: osadeghipour@yahoo.com)

 

Abstract

Drought stress limits crop productivity in many regions of the world. Methyl jasmonate (MeJA) a plant growth regulator is involved in many plant growth and developmental processes and tolerance to environmental stresses. This field experiment was conducted to investigate the role of exogenous application of MeJA (seed priming, foliar application at the vegetative or reproductive stages and the combination of them) in alleviating the adverse effects of drought stress in cowpea. Results showed that drought stress severely reduced growth attributes such as plant height, leaf area, biomass and seed yield as well as stomatal conductance, relative water content (RWC) and chlorophyll value. Drought also increased membrane lipid peroxidation (malondialdehyde ''MDA'' content), proline and total soluble sugars (TSS) contents. On the other hand, exogenously applied of MeJA improved all growth attributes under drought stress conditions through stomata closure and improving RWC, enhancing chlorophyll value, proline and TSS contents and also reduction of membrane lipid peroxidation. Among MeJA treatments, foliar application at the reproductive stage was the most effective. These results suggest the involvement of MeJA in increasing drought tolerance of cowpea by improving water status and chlorophyll value, enhancing compatible solutes accumulation and reducing membrane lipid peroxidation.

 

Keywords: Foliar application; Jasmonates; Legumes; Seed priming; Water stress.

 

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Response of yield and yield components of chickpea to Fe foliar fertilization

 

Siros Ekhtiari1* and Soheil Kobraee1

 

1Department of Agronomy and Plant Breeding Kermanshah Branch, Islamic Azad University, Kermanshah, Iran.

*Corresponding author (e-mail: S.ekhtiari@yahoo.com)

 

Abstract

This study investigated response of Fe concentrations in shoot and seed, yield and yield components of chickpea cultivars to iron foliar fertilization. The experimental design was set up in split plot in randomized complete block with three replications. The main plot includes three Fe foliar treatment and four chickpea cultivars which are replaced in sub plot. At harvest, seed yield and its components, pod, seed and total dry weight, and seed protein content were measured. The Fe content was determined by Atomic Absorption Spectrometry. According to the results, Fe spraying had significant effect on the iron concentrations in shoots and seeds, dry weight of seed and total plant, number of pod per plant,100 seed weight and seed yield at 1% level and pod dry weight at 5% level. Based on the results, Fe foliar application at flowering stage compared to control treatments significantly increased number of pod 34.0% and seed 19.0% per plant. The highest 100 seed weightwas observed in Fe foliar fertilization at pod set stagewhile, the highest seed yieldobtained when iron was applied at flowering stage.Compared to control treatment, iron foliar fertilization at pod set stage significantly increased the Fe concentrations in shoots and seeds by, 142.9% and 181.7%, respectively.

 

Keyword: Chickpea, concentration, fertilizer, flowering stage, iron

 

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