Effect of plant growth regulators on physiological behavior of rice (Oryza sativa L.) under kharif Konkan condition

Abstract

A field experiment was conducted to study the effect of plant growth regulators on physiological behavior of rice (Oryza sativa L.) under kharif Konkan condition. Plant growth regulators at different concentration were applied through foliar spray at 30, 60, 90 and 120 DAS. The experiment consisted of 11 treatment comprising Triacontanol (10, 15and 15 ppm), CPPU (1, 2 and 3 ppm), salicyclic acid (15, 20 and 25 ppm) and paclobutrazol (50 ppm) treatment were imposed at 30, 60, 90 and 120 DAS. Among the treatments foliar application of salicylic acid @ 15 ppm and foliar application of triacontanol @ 15 ppm recorded significant difference on physiological parameters as compared to other treatments. The increased rate of photosynthesis and stomata conductance and reduced rate of transpiration have been achieved by the foliar application of salicylic acid @ 15 ppm. Chlorophyll content was found to be increased by the foliar application of triacontanol @ 15 ppm.