Phosphorylation of birch BpNAC90 improves the activation of gene expression to confer drought tolerance.

ABSTRACT: The NAC transcription factors (TFs) play important roles in mediating abiotic stress tolerance; however, the mechanism is still not fully known. Here, an NAC gene (BpNAC90) from a gene regulatory network of Betula platyphylla (birch) that responded to drought was characterized. Overexpression and knockout of BpNAC90 displayed increased and reduced drought tolerance, respectively, relative to wild-type (WT) birch. BpNAC90 binds to different DNA motifs to regulate target genes in conferring drought tolerance, such as Eomes2, ABRE and Tgif2. BpNAC90 is phosphorylated by drought stress at Ser 205 by birch SNF1-related protein kinase 2 (BpSRK2A). Mutated BpNAC90 (termed S²⁰⁵A) with abolished phosphorylation, was transformed into

SUBMITTER: Wang Z 

PROVIDER: S-EPMC11040210 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature