SlSTOP1-regulated <i>SlHAK5</i> expression confers Al tolerance in tomato by facilitating citrate secretion from roots.

ABSTRACT: SENSITIVE TO PROTON RHIZOTOXICITY 1 (STOP1) is a core transcription factor that regulates the expression of aluminum (Al) resistance genes to manage Al toxicity in plants. However, the genome-wide roles of SlSTOP1 in the Al stress response of tomato (Solanum lycopersicum) remain largely unknown. Here, we report that SlSTOP1 is crucial for Al tolerance in tomato, as loss-of-function mutants of SlSTOP1 displayed hypersensitivity to Al stress. Aluminum stress had no effect on SlSTOP1 mRNA expression, but promoted accumulation of SlSTOP1 protein in the nucleus. Through integrated DNA affinity purification sequencing and RNA sequencing analysis, we identified 39 SlSTOP1-targeted Al-responsive genes, some of which are homologous to known Al resistance genes in other plant species,

SUBMITTER: Zhu H 

PROVIDER: S-EPMC11561044 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature