تأثير حامض السلسليك والرصاص في إيقاف عمليات التعمير بدلالة استجابة تجذير عقل الماش Phaseolus aureus Roxb. المعمرة

Abstract

Abstract :The present study explores the effect of salicylic acid (SA) and Lead Cloride ( PbCl2) in stopping of oxidative processes that occurs during aging phenomenon in terms of rooting response of aging mung bean cuttings via indole acetic acid (IAA) level. The data revealed, significant increase in rooting response of fresh cuttings at (100-150ppm) and aged cuttings at (0.01, 0.1, 1, 100, 200ppm) in PbCl2 solution. While, high concentration (500ppm) revealed significant decrease in rooting response compared to fresh cuttings treated in d/H2O (control). On the other hand, the data revealed, significant increase in rooting response of fresh cuttings at (25ppm), and aged cuttings at (25-50ppm) in (SA). Salicylic acid is a common plant-produced phenolic compound, which can function as growth regulator, caused off setting the oxidative processes that occurs during aging phenomenon . Quantitative estimation of IAA by spectrophotometric method as indicator for oxidative processes that occurs during aging phenomenon verified significant increase of IAA content in hypocotyls of aging cuttings at low and mediated concentration of ( PbCl2) and (SA) . Key Words: Aging, Rooting response, Stem cutting, Trace elements, Pb, Phenolic compounds, Salicylic acid and IAA biosynthesis.