Effect of drought stress implemented at pre- or post-anthesis stage on some physiological parameters as screening criteria in chickpea cultivars |
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Authors: | A Gunes A Inal M S Adak E G Bagci N Cicek F Eraslan |
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Institution: | (1) Department of Soil Science and Plant Nutrition, Faculty of Agriculture, University of Ankara, 06100 Ankara, Turkey;(2) Department of Field Crops, Faculty of Agriculture, University of Ankara, 06100 Ankara, Turkey |
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Abstract: | Drought is one of the most important factors limiting chickpea production in arid and semi-arid regions. There is little information
regarding genotypic variation for drought tolerance in chickpea cultivars. Screening for drought tolerance is very important.
It is essential to identify the physiological mechanisms of drought tolerance to complete conventional breeding program. Glasshouse
experiment was carried out to study the genotypic variation among 11 chickpea (Cicer arietinum L.) cultivars. Plants were grown either under optimum conditions or drought stress was implemented at pre-or post-anthesis
stages. The drought susceptibility index (DSI) was used as the measure of drought tolerance. Relationships between DSI and
excised-leaf water loss (RWL), relative water content (RWC), membrane permeability, ascorbic acid, proline, and chlorophyll
contents, lipid peroxidation, and hydrogen peroxide concentrations were determined in order to find out whether these physiological
parameters could be used as the genotypic selection criteria for drought tolerance. The results of this study indicated that
there was a wide variation in tolerance to drought stress among the chickpea cultivars, which could be exploited in breeding
new chickpea cultivars with high drought tolerance. The results also demonstrated that drought-tolerant cultivars had a higher
RWC, ascorbic acid and proline concentrations, but lower RWL and membrane permeability in comparison to drought-sensitive
cultivars. The significant and a well defined relationships between DSI and RWC, RWL, ascorbic acid, proline, and membrane
permeability were found. It was concluded that these parameters could be instrumental in predicting the drought tolerance
of chickpea cultivars.
This text was submitted by the authors in English. |
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Keywords: | Cicer arietinum genotypes ascorbic acid chlorophyll drought tolerance excised-leaf water loss H2O2 lipid peroxidation membrane permeability proline relative water content |
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