Sodium Hydrosulfide Induces Resistance Against Penicillium expansum in Apples by Regulating Hydrogen Peroxide and Nitric Oxide Activation of Phenylpropanoid Metabolism.

ABSTRACT: As a multifunctional signaling molecule, hydrogen sulfide (H₂S) has been reported to induce plant responses to a variety of abiotic stresses. However, there are no reports on H₂S treatment inducing resistance in apples against Penicillium expansum, a biotic factor, and its possible mechanism of action. In this study, fumigating apples with 5 mM sodium hydrosulfide (NaHS), the exogenous donor of H₂S, for 12 h reduced the diameter of lesions in fruit colonized by P. expansum. NaHS treatment markedly promoted the synthesis of endogenous H₂S, hydrogen peroxide (H₂O₂), and nitrogen oxide (NO). In vivo NaHS treatment enhanced the activities of phenylalanine ammonia-lyase, cinnamate 4-hydroxylase, p-coum

SUBMITTER: Deng H 

PROVIDER: S-EPMC8440896 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature