The Study Of Surface Area And Dry Biomass Of Different Assimilating Organs In Wheat Genotypes Under Drought Stress

We studied the effect of drought stress on assimilation area and dry biomass of leaves, stems and ears of durum (Triticum durum Desf.) and bread (Triticum aestivum L.) wheat genotypes under rainfed conditions. Area and dry biomass of leaves were reduced significantly till the grain formation stage. Despite the fact that area of the stem of most genotypes under the influence of water stress was reduced till earing, the increase in dry biomass continued until the formation of grains. Water stress led to more pronounced reductions in assimilation area and dry biomass of leaves and stems. A higher rate of grain filling was observed under irrigation. More profound reduction in ear mass was observed among genotypes of durum wheat compared with bread wheat.