Influence of Water Stress on Some Physiological Traits of Five Wheat (Triticum spp.) Cultivars. (original) (raw)

This study was conducted in the plastic house of Grdarasha to investigate the effect of five levels of water stress (15%, 25%, 45%, 65%, 85%) depletion from field capacity on some physiological traits of five wheat cultivars (Rizgari, Aras, Adana, and Cham6) bread wheat while CIMMYT cultivar as durum wheat with three replications in a completely randomized factorial design. Results indicated significant effect of water stress levels, wheat cultivars and the combination of both factors on plant height, flag leaf area, number of spikelets.spike-1, spike length, number of seeds.spike-1, yield.plant-1, biological yield, harvest index, and thousand seeds weight. Meanwhile soluble carbohydrates and proline where increased significantly with increasing water stress levels, also it caused significant effect on nitrogen, phosphor and potassium. Using drought indices it was elucidated that studied cultivars could be arranged form most drought resistant to less drought resistant as cultivars of Aras, Rizgari, Cham6, Adana and CIMMYT which could be sown in Kurdistan region under drought environments.