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:: Volume 16, Issue 2 (7-2014) ::
علوم زراعی 2014, 16(2): 91-108 Back to browse issues page
Effect of drought stress on physiological traits, grain yield and its components in chickpea (Cicer arietinum L.) genotypes
Abstract:   (4439 Views)
To investigate drought stress effects on grain yield and its component in chickpea genotypes and its relation with physiological characteristics, nineteen chickpea genotypes were evaluated in field and pot experiments at the Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran, in 2010-11 cropping season. Field experiment was carried out as split plot arrangement in randomized complete blocks design (RCBD) with three replications. Irrigation and rainfed conditions were assigned to main plots and chickpea genotypes were randomized in subplots. Grain yield, some yield components and drought resistance and susceptible indices were measured and recorded. Pot experiment was conducted as factorial arrangement using RCBD with two factors including irrigation treatments (irrigation at -3 (control) and -12 bar (stress) of soil water potential) and 19 chickpea genotypes as second factor with three replications. In this experiment, stomatal conductance at the vegetative stage and polyphenol oxidase activity at the vegetative and reproductive stages were studied. Chickpea genotypes divided in high and low yield potential and drought tolerant and susceptible genotypes based on seed yield under drought and control conditions. Results showed that drought stress reduced pod and grain per square meter by 43% and 44%, respectively and caused 43% reduction of grain yield, however, it did not have significant effect on 100 grain weight. In pot experiment, drought stress reduced stomatal conductance by 78% and drought tolerant genotypes had 33% higher stomatal conductance in comparison to drought susceptible genotypes. There were highly significant positive correlation (r = 0.52**) between polyphenol oxidase activity and stomatal conductance. It can be conclude that polyphenol oxidase activity and stomatal conductance would be useful physiological traits for improvement of drought tolerant genotypes in chickpea breeding programs.
Keywords: Chickpea, Drought tolerance, Stomatal conductance and Polyphenol oxidase
Full-Text [PDF 319 kb]   (3934 Downloads)    
Type of Study: Scientific & Research | Subject: Special
Received: 2015/02/15 | Accepted: 2015/02/15 | Published: 2015/02/15
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Effect of drought stress on physiological traits, grain yield and its components in chickpea (Cicer arietinum L.) genotypes. علوم زراعی 2014; 16 (2) :91-108
URL: http://agrobreedjournal.ir/article-1-36-en.html

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Volume 16, Issue 2 (7-2014) Back to browse issues page
نشریه علوم زراعی ایران Iranian Journal of Crop Sciences
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