Peptide regulation of plant cell homeostasis

Abstract

Homeostasis acts as a fundamental characteristic of living organisms and is understood as maintaining the internal environment within acceptable limits. Various classes of plant signal peptides are involved in the regulation of plant homeostasis. The aim of the review is to systematize various aspects of peptide regulation of plant cell functions. It has been established that peptides of the PSY1 and RALF families maintain pH homeostasis; peptides of the PSK family regulate the homeostasis of reactive oxygen species, abscisic acid and embryogenesis of plant cells. PNP peptides regulate water-salt metabolism, CIF peptides limit diffusion between tissues. Short peptides consisted of 2-4 amino acids reduce oxidative stress and stimulate the proliferation and differentiation of plant cells. KE, AEDG and AEDL short peptides are considered promising regulators of homeostasis and functions of plant cells, and therefore their role as new generation phytohormones is assumed.