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OsCYP51H9 Integrates Brassinosteroid Biosynthesis and Nitrogen Sensing to Enhance Grain Development and Nitrogen Utilization in Rice
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张
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DOI：10.1016/j.plaphy.2026.111633.png)
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Abstract
En 中文
• OsCYP51H9, an ER-localized P450 in rice, is predominantly expressed in reproductive and vascular tissues. • Knockout of OsCYP51H9 disrupts phytosterol/BR metabolism, causing dwarfism, poor roots, small grains, and erect leaves. • Overexpression of OsCYP51H9 under low nitrogen enhances root growth, nitrogen accumulation, grain yield, and upregulates nitrogen-responsive transcription factors OsWRKY69 and OsDREB1C/B. • OsCYP51H9 bridges BR-dependent development with nitrogen adaptation, presenting a promising target for high-yield, low-fertilizer rice breeding.
Keywords:
brassinosteroid
phytosterol
OsCYP51H
nitrogen utilization
grain yield
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