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