Author(s):

NK Sinha, J Ghosh, VD Lohot, Md. Monobrullah, S Ghosal, KK Sharma, AK Singh and Brajendra

Abstract: The present study was carried out to study the effect of different levels of plant growth regulators on morpho-physiological and biochemical characters and their relationship on yield attributing traits that helps in diminishing seed shattering, improving seed set and yield. Treatment of different plant growth regulators (PGRs) levels including thiourea (500 ppm, 1000 ppm, 1500 ppm), naphthalene acetic acid (NAA) (15 ppm, 30 ppm, 45 ppm), and salicylic acid (100 ppm, 200 ppm, 300 ppm) at different levels were sprayed at pre flowering and anthesis stage and their effects were studied on different morpho-physiological characters of Flemingia semialata. The experiment was planned under RBD with three replications for each treatment. It was observed that Thiourea @1000 ppm recorded highest plant height, stem diameter, leaf area, leaves number, number of raceme/bush, floret number/raceme, number of pods/ raceme, seed set %, 1000 seed weight and seed yield. Seed set (%) recorded highest in the plant treated with thiourea @1000 ppm whereas seed shattering (%) recorded lowest in the treatment thiourea @1000 ppm followed by NAA @ 30 ppm. Further, maximum seed yield was recorded in the plants sprayed with thiourea 1000 ppm followed by NAA @ 30 ppm. Among different plant growth regulators (PGRs) applications in Flemingia semialata, thiourea @1000 ppm and NAA @30 ppm were found to be effective in diminishing seed shattering and enhancing number of raceme/plant, floret number/raceme, seed set %, 1000 seed weight, seed yield

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