GhMYB102 affects cotton fibre elongation and secondary wall thickening by regulating GhIRX10 in cotton.

ABSTRACT: Upland cotton (Gossypium hirsutum) is a principal economic crop and a fundamental raw material for the textile industry. The quality of cotton fibres is significantly influenced by the synthesis of cell wall polysaccharides. This study focuses on GhIRX10, a beta-1,4-xylosyltransferase crucial for xylan backbone synthesis. Overexpression of GhIRX10 enhances xylan synthesis, which impacts fibre elongation and secondary cell wall thickening. GhMYB102, identified as a direct regulator of GhIRX10 expression, was confirmed through comprehensive validation. Overexpression of GhMYB102 resulted in a similar phenotype as OE-GhIRX10: increased cell wall thickness and reduced fibre length. Overexpression of GhMYB102 upregulated the expression of key cell wall synthesis-related genes, including GhCESA4

SUBMITTER: Wu A 

PROVIDER: S-EPMC11933854 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature