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EFFECTS OF PLANT GROWTH REGULATORS ON NEUROTOXIN CONTENT IN LEAVES OF LATHYRUS SATIVUS

A. BANO AND M. SANAULLAH

Abstract: Effects of abscisic acid (ABA) and gibberellic acid (GA) on accumulation of Beta N-oxalylamino-Lalanine (BoAA) in leaves of Lathyrus sativus L., cvs. K 424 and K 280 under drought stress was examined. Simultaneous application of ABA and drought was inhibitory to BoAA accumulation under drought as compared to ABA application after 12 days of drought period. Simultaneous application of GA and drought was stimulatory to BoAA accumulation than that of GA applied after 12 days of drought stress. Indigenous Variety K 280 having higher BoAA content than the exotic variety K 424 showed low percentage of BoAA under drought stress. Rewatering of stressed plants of K 424 reduced BoAA whereas rewatering of K 280 increased BoAA as compared to drought stress treatment. Reduction in BoAA following simultaneous application of ABA and drought may be due to favourable effect of ABA in water conservation mechanism.

Departmmt of Biological Sciences, Quaid-i-Azam University. Islamabad. Pakistan.