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Pakistan Journal of Biological Sciences

Year: 2000  |  Volume: 3  |  Issue: 3  |  Page No.: 500 - 502

Role of Growth Stimulant in the Morphological Traits of Soybean

Aminullah, Muhammad Jamal, Sahibzada Obaid Ullah Jan, Munawar Khan and Muhammad Safdar Baloch

Abstract

Effect of different concentrations of IAA applied at three stages of plant growth i.e., 15 days after emergence, at flowering and at seed filling was studied. A linear trend in the increase of Absolute Growth Rate (AGR) of shoot at all concentrations was observed which was maximum at 10 ppm. AGR of root was maximum at 5 ppm concentration. AGR at 0 ppm was minimum. AGR of shoot was linearly affected at different stages and maximum at 15 days after emergence stage. Relative Growth Rate (RGR) of shoot has a positive response to 10 ppm concentration at vegetative stage. While RGR of root was stimulus towards 15 ppm concentration. RGR of shoot and root were maximum at seed filling and 15 days after emergence stages respectively.

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