Evaluation of the effect of Gibberellic acid (GA3) to reducing the harmful effect of water shortage on the corn

Abstract

A field experiment was conducted in Padang Besar, Perlis, Malaysia from 2014 and 2016 four seasons. In each year, the experiments have been implemented in order to study the effect of three levels of irrigation water (25% (no stress), 50% (moderate deficit), 75% (water deficit) of field capacity), and five concentrations of Gibberellic acid (GA3) (0,50,100, 200,300 ppm). From the study there were a significant influence of sprayed gibberellic acid on the corn leaves, which led to increase in the growth characters while sprayed gibberellic acid caused to lengthen the growing season and stimulate the vegetative growth. The results showed increased the amount of protein, chlorophyll content, gibberellic acid concentration (mg. Kg-1) and oil in the seeds, with an increased the concentration of sprayed gibberellic acid.