Trihelix Transcription Factor OsTGS1 Regulates Grain Size and Weight in Rice.

ABSTRACT: Grain size is one of the major factors determining rice grain yield. Nevertheless, our knowledge of the molecular mechanisms underlying the control rice grain size remains limited. Trihelix proteins are plant-specific transcription factors that regulate plant growth and development. However, their roles in modulating grain size in cereal crops are largely unknown. Here, we report the rice trihelix family gene Oryza sativa trihelix transcription factor related to grain size 1 (OsTGS1) as a novel regulator of grain size and weight. Mutation of OsTGS1 leads to large and heavy grains, whereas overexpression of OsTGS1 results in small and light grains. OsTGS1 regulates grain size by influencing cell division and cell expansion in spikelet hulls. OsTGS1 is expressed in various tissues, and its e

SUBMITTER: Gao Q 

PROVIDER: S-EPMC12040797 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature