Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

EFFECT OF DETOPPING, DEFOLIATION AND DEFLOWERING ON PHOTOSYNTHESIS AND YIELD PARAMETERS OF NON-BRANCHING SESAME (Sesamum indicum L.) (Pages : 1 - 4)

A pot experiment was carried out at Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, Bangladesh to investigate the influence of detopping, defoliation and deflowering on photosynthetic, yield attributes and yield of non-branching high yielding sesame cv Binatil-1. Separately detopping, defoliation and deflowering were induced at fertilization, after 5, 6, 7 and 8 capsules bearing nodes at base and continued to maturity with a control. Photosynthetic rate, number of capsule, seeds, capsule dry mass and total dry matter plant-1 decreased with detopping, defoliation and deflowering but 1000-seed weight was unaffected. Stomatal conductance (Ci) and transpiration rate (E) varied whereas photosynthetic rate (PN) remained unchanged from fertilization to maturity. Seed yield decreased 68-80, 47-79 and 50-75% with detopping, defoliation and deflowering, respectively. The results suggest that detopping, defoliation and deflowering had no positive effect on the yield improvement of non-branching sesame variety, thrust should be given on the architectural development and yield improvement of branching type sesame varieties. PN (r = -0.658*) was negatively correlated with vapor pressure deficit (VpdL). Total dry matter (TDM) (r= 0.737**), number of capsule (r=0.659*) and seeds plant-1 (r= 0.985**) were positively correlated with seed yield.Download