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Salicylic acid in relation to other phytohormones in plant: A study towards physiology and signal transduction under challenging environment

2020; Elsevier BV; Volume: 175; Linguagem: Inglês

10.1016/j.envexpbot.2020.104040

1873-7307

Yamshi Arif, Fareen Sami, Husna Siddiqui, Andrzej Bajguz, Shamsul Hayat,

Plant tissue culture and regeneration

Plant hormones play a vital role in promoting growth, development and metabolism of the plant, as well as act as a protector against various environmental stresses. In particular, salicylic acid (SA) is a potent phenolic signaling biomolecule and a multifaceted plant growth regulator which participates in a wide range of growth, metabolism and defense systems. Exogenous application of SA facilitates seed germination, growth, and flowering, up-regulates photosynthesis and increases the activity of enzymatic and non-enzymatic antioxidants. SA is a potent tool for sustainably mitigating environmental stresses in many plants by modulating physiological and metabolic processes of plants. Based on recent reports, SA biosynthesis and its regulation are discussed. This review highlights oxidative post-translational modifications, involvement of various proteins, and ROS interaction during SA signaling. Furthermore, it evaluates the role of exogenous application of SA in regulating diverse physiological and biochemical processes in healthy and stressed plants and assesses SA effects in plants exposed to various abiotic stress. Additionally, the cross talk of SA with other phytohormones and polyamines under normal and stressed conditions is also discussed.