Efficacy of indol-3-yl acetic acid on improvement of some biochemical and physiological aspects of wheat flag leaf during grain filling

摘要

Flag leaf area, leaf fresh and dry matter show two phases of development during grain filling in Triticum aestivum. The initial large increase in leaf size is mainly due to water intake. Chlorophylls, reducing sugars, sucrose, Hill activity and photosynthetic activity appeared to be stimulated during leaf growth; thereafter, a noticeable decline in these parameters was manifested particularly throughout leaf senescence. The maximum accumulation of polysaccharide and protein occurred at the beginning of grain set followed by continuous decline in these absolute values during grain filling.