Effect of plant growth regulators on morphological and physiological parameters in soybean (Glycine max (L.) Merrill.)

Abstract

The growth regulating substances viz.,Indol Acetic Acid (IAA at 100 ppm, 150 ppm and 200 ppm, 250 ppm), Gibberlic acid (GA3 at 100 ppm, 150 ppm ,200 ppm and 250ppm). Concentrations were applied as foliar spray 30 DAS. Application of IAA and GA3 increases the plant height as compared to control. No. of leaves, Leaf area, Leaf dry weight, Stem dry weight and Total dry weight are increased due to application of IAA and GA3 over control but IAA at 100 ppm and GA3 150ppm is most significantly effective than all rest of treatments.