Hydrogen peroxide mediates spermidine-induced autophagy to alleviate salt stress in cucumber.

ABSTRACT: Autophagy, an evolutionally conserved cellular degradation process, plays critical roles in plant development and stress response. Despite the wealth of information on the vital role of autophagy in responses to environmental stresses, little is known about the regulation of autophagy. In this study, we demonstrated that spermidine (Spd), a kind of polyamine, was involved in the regulation of salt tolerance through activating the expression of ATG (autophagy-related) genes and the formation of autophagosomes in cucumber under salt stress. Furthermore, NADPH oxidase-derived apoplastic H₂O₂-mediated Spd-induced salt tolerance and autophagy. Exogenous Spd significantly increased the tolerance to salt stress and inhibited the accumulation and ubiquitination of inso

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC8525995 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature