Biochemical Assimilates Accumulation and Remobilization at Reproduction Stage Drought Stress in Upland Rice (Oryza sativa L.)
Environment & Ecology
A very week correlation obtained between leaf rolling score and yield, shoot soluble sugar and RWC, respectively. Leaf depth ; score in well correlated with leaf soluble sugar. Plant height is often considered as a factor in plant response to drought stress. Rice accumulates significant amount of carbohydrate before and wide variability exists among genotypes. Improved variety like NDR-97, Vandana and DH line have higher content of total soluble sugar at flowering than do low yielding traditional cultivar like Azucena and Saita correlation study revealed strong positive relationship between grain yield in stress and shoot soluble sugar. Assimilate accumulated prior to flowering are of paramount importance when plant experience drought at later stage. We hypothesized that grain yields of rice crops drought stressed at flowering, directly related to reserve food materials and the ability of the plant to translocate those assimilate.