The transcription factor MdWRKY9 is involved in jasmonic acid-mediated salt stress tolerance in apple.

ABSTRACT: Salt stress is an important abiotic stress affecting the growth and fruit quality of apple fruits. Although jasmonic acid (JA) hormones and WRKY transcription factors (TFs) have both been reported to be involved in plant salt stress responses, the molecular mechanisms by which JA-mediated WRKY TFs regulate salt stress in apples remain unclear. Here, we report the identification of a WRKY family TF from apple, MdWRKY9, and its involvement in apple salt tolerance by regulating the expression of Na⁺/H⁺ antiporters, MdNHX1, and MdSOS2. Furthermore, we show that the protein repressors MdJAZ5 and MdJAZ10 in the JA signaling pathway can both interact with MdWRKY9 to form a complex and inhibit its DNA-binding and transcriptional activation activity. The JA signa

SUBMITTER: Zhao J 

PROVIDER: S-EPMC12038257 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature