The OsmiRNA166b-OsHox32 pair regulates mechanical strength of rice plants by modulating cell wall biosynthesis.

ABSTRACT: The plant cell wall provides mechanical strength to support plant growth and development and to determine plant architecture. Cellulose and mixed-linkage glucan (MLG) present in primary cell wall, whereas cellulose, lignin and hemicellulose exist in secondary cell wall. Biosynthesis of the cell wall biopolymers needs the coordinated transcriptional regulation of all the biosynthetic genes. The module of OsmiR166b-OsHox32 regulates expression levels of the genes related to biosynthesis of MLG, cellulose and lignin. Transgenic plants knocking down miR166b (STTM166b) by short tandem target mimic (STTM) technology or overexpressing OsHox32 (OEHox32) showed drooping leaves and brittle culms. Due to accumulation of less lignin and cellulose, the cell wall thickness of STTM166b and OEHox32 plants

SUBMITTER: Chen H 

PROVIDER: S-EPMC8313131 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature