Salicylic acid improves chilling tolerance via CsNPR1-CsICE1 interaction in grafted cucumbers.

ABSTRACT: Salicylic acid (SA) plays a role in the regulation of grafting-induced cold tolerance. However, the molecular mechanism behind it is still unknown. Here, we established that the phenylalanine ammonia-lyase (PAL) pathway-dependent elevate in SA content in grafted cucumber leaves was not only synthesized in the leaves but also transported from the roots under chilling stress. RNAi-CsPAL with low SA content as rootstock reduced SA accumulation in grafted seedling leaves while decreasing rootstock-induced cold tolerance, as evidenced by higher electrolyte leakage (EL), hydrogen peroxide (H₂O₂), and superoxide anion (O₂ ^·-) contents and lower expression of cold-responsive genes (CsICE1, CsDREB1A, CsDREB1B, and CsCOR47

SUBMITTER: Fu X 

PROVIDER: S-EPMC11492142 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature