Overlapping horizons of salicylic acid under different stresses

Abstract

Salicylic acid (SA) is an established plant hormone with its multifaceted, pleiotropic effects within and beyond the plant system, under stress and non-stress conditions. SA has been appreciated in regulating biotic stress locally under symbiotic and pathogenic and non-pathogenic invasion to induced systemic resistance (ISR) and systemic acquired resistance (SAR) eliciting an array of secondary molecules and a different profile of functional proteins. However, systemic knowledge of cause and consequence of indigenous inbuilt of SA and precise details of its regulation mechanism are still not clear.This chapter investigates the indigenous accumulation and overlapping roles of SA under different environmental and physiological conditions, highlighting its recently updated roles in regulating plants.