Physiological Traits of Durum Wheat (<i>Triticum durum</i> Desf.) and Bread Wheat (<i>Triticum aestivum</i> L.) Genotypes under Drought Stress — Oak Academic Publishing
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Physiological Traits of Durum Wheat (<i>Triticum durum</i> Desf.) and Bread Wheat (<i>Triticum aestivum</i> L.) Genotypes under Drought Stress
Plant Physiology and Biotechnology Department, Research Institute of Crop Husbandry, Baku, Azerbaijan
1 Plant Physiology and Biotechnology Department, Research Institute of Crop Husbandry, Baku, Azerbaijan
We aimed to study impact of drought stress on physiological traits of field grown 8 durum and 14 bread wheat genotypes. Drought caused decrease of leaf gas exchange parameters—photosynthesis rate (P n ), stomatal conductance (g s ), and transpiration rate (E), an increase of intercellular CO 2 concentration (C i ). Area (LA) and dry mass of leaves per stem, leaf area index (LAI) of genotypes significantly reduced from booting to watery ripe stages. Water deficiency led to a decrease of chlorophyll a, b (Chla,b) and carotenoids (Car (x+c) content, relative water content (RWC). Water stress more affected on LA than leaf dry mass of wheat genotypes, leaf specific mass (LSM) increased. The Chl(a+b) content, P n and yield of bread wheat genotypes were relatively higher than durum wheat ones. Physiological traits may be reliable for selection of drought tolerant wheat genotypes.
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