Salicylic acid-induced abiotic stress tolerance and underlying mechanisms in plants

Abstract

Abiotic stresses (such as metals/metalloids, salinity, ozone, UV-B radiation, extreme temperatures, and drought) are among the most challenging threats to agricultural system and economic yield of crop plants. These stresses (in isolation and/or combination) induce numerous adverse effects in plants, impair biochemical/physiological and molecular processes, and eventually cause severe reductions in plant growth, development and overall productivity. Phytohormones have been recognized as a strong tool for sustainably alleviating adverse effects of abiotic stresses in crop plants. In particular, the significance of salicylic acid (SA) has been increasingly recognized in improved plant abiotic stress-tolerance via SA-mediated control of major plant-metabolic processes. However, the basic biochemical/physiological and molecular mechanisms that potentially underpin SA-induced plant-tolerance to major abiotic stresses remain least discussed. Based on recent reports, this paper: (a) overviews historical background and biosynthesis of SA under both optimal and stressful environments in plants; (b) critically appraises the role of SA in plants exposed to major abiotic stresses; (c) cross-talks potential mechanisms potentially governing SA-induced plant abiotic stress-tolerance; and finally (d) briefly highlights major aspects so far unexplored in the current context.

Effect of Abiotic Elicitors on Biochemical Status of Two Cultivars of Vigna Radiata (L.) Wilczek

“…The results indicate and reiterate the previous finding of involvement of Salicylic acid in modifying abiotic stress response [7][8][9][10] . Cultivar specific modification of salt stress response by salicylic acid is very starkly evident.…”

Regulation of stilbene biosynthesis in plants

“…SA is known to mediate plant local and systemic responses against plant microbial pathogens and abiotic stresses (Vlot et al 2009;Khan et al 2015). It has been shown that exogenous application of SA increased the levels of resveratrol accumulating in cell cultures of V. amurensis and V. vinifera and up-regulated expression of PAL and STS genes (Kiselev et al 2007(Kiselev et al , 2010Xu et al 2015).…”

Kaolin and salicylic acid foliar application modulate yield, quality and phytochemical composition of olive pulp and oil from rainfed trees

“…Alternatively, the exogenous application of kaolin (KL) and salicylic acid (SA) can be adequate short-term solutions to attenuate the adverse effects of summer associated stresses. KL is a white mineral clay that avoid the accumulation of heat load through the reflection of sunlight, reducing the risk of leaf and fruit damage from high temperatures and solar injury (Glenn and Puterka, 2004) and SA is a signaling phytohormone with diverse regulatory roles in plant metabolism and abiotic stress tolerance (Khan et al, 2015). However, the influence of these substances on crop quality have received less attention than the influence on yield, possibly because they are more difficult to detect and sometimes are not consensual.…”