OSH45, a homeobox transcription factor, coordinates low-phosphate adaptation in rice.

ABSTRACT: Phosphorus (P), an essential macronutrient critical for plant growth and development, faces significant availability constraints in agricultural soils, substantially limiting crop yield potential. Transcription factors (TFs) play pivotal roles in phosphate (Pi) starvation responses in plants. In this study, we identified OSH45 (Oryza sativa homeobox 45), a homeobox domain TF in rice (Oryza sativa L.), which was strongly induced in roots under Pi starvation. Subcellular localization assays indicated that OSH45 is a nuclear localized protein. OSH45 overexpression transgenic plants exhibited enhanced low-Pi tolerance, characterized by significantly higher Pi concentrations and increased shoot and root biomass compared to wild type (WT) under Pi-limited conditions.

SUBMITTER: Lu H 

PROVIDER: S-EPMC12423420 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature