Effect of acetylsalicylic acid, indole-3- bytric acid and gibberellic acid on plant growth and yield of pea (Pisum sativum L.)

Abstract

Pots experiment were conducted during the two successive seasons of 2007 and 2008 to investigate the effect of acetylsalicylic acid (ASA) at 10 and 20 ppm, indole-3-bytric acid (IBA) at 50and 100 PPM and gibberellic acid (GA<inf>3</inf>) at 50 and 100 PPM on pea (Pisum sativum L.) cv Prgress mog. Growth regulators were applied as foliar spray at 25 and 35 days after sowing. Three samples were taken at 21, 45 and 70days after sowing coinciding with vegetative stage, flowering and harvest respectively. Application of ASA and IBA enhanced plant growth as indicated by plant height, number of leaves, fresh and dry weights in both seasons. Significant increase in 1000 seeds weight and pod parameters (length of pod, pods number/plant, seeds number/pod, pods fresh and dry weights) was recorded by ASA and IBA at harvest comparing with control and GA 3 treated plants. These positive effects of ASA and IBA were correlated with significant increase in total chlorophylls in leaves, total soluble proteins, praline, phenol, total soluble carbohydrates and sugars in seeds. Analysis of endogenous phytohormones in seeds at harvest revealed reduction in ABA concentration and an increase in zeatin riboside and GA3 concentration in GA<inf>3</inf> treated plants. While plants treated with ASA and IBA showed an opposite trend. © 2009, INSInet Publication.