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OsBOR1 Mediating Boron Efflux Controls Panicle Development via ROS Homeostasis in Rice.

Fayu Yang1, Yuanzhuo Gao1, Ruofei Cheng1

  • 1Rice Research Institute, Key Laboratory of Crop Molecular Improvement, Academy of Agricultural Sciences, College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China.

Journal of Agricultural and Food Chemistry
|March 16, 2026
PubMed
Summary
This summary is machine-generated.

A novel boron transporter, OsBOR1, is crucial for rice panicle development. Its disruption leads to boron imbalance and oxidative stress, impacting grain yield.

Keywords:
BSA sequencingboron efflux transporterpanicle developmentrice

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Area of Science:

  • Plant Biology
  • Molecular Genetics
  • Agricultural Science

Background:

  • Panicle development is a key factor influencing rice grain yield.
  • Boron is an essential micronutrient for plant growth and development.

Purpose of the Study:

  • To identify genes regulating rice panicle development.
  • To elucidate the role of the boron transporter 1 (BOR1) in rice.

Main Methods:

  • Bulked segregant analysis sequencing
  • Genetic complementation and gene knockout experiments
  • Transcriptome analysis and reactive oxygen species measurement

Main Results:

  • A boron efflux transporter gene, OsBOR1, was identified and linked to defective panicle development.
  • OsBOR1 disruption caused altered boron distribution and loss of homeostasis.
  • Mutants showed differential gene expression in metabolism and oxidative stress pathways, with elevated reactive oxygen species.

Conclusions:

  • OsBOR1 is essential for maintaining normal rice panicle development.
  • OsBOR1 regulates panicle development by maintaining boron homeostasis and reactive oxygen species balance.