数字农科院2.0

OsACL-A2 Regulates Positive Iron Uptake and Blast Resistance in Rice

文献类型： 外文期刊

作者： DUAN Wenjing#; AARON Chan#; XU Peng#; ZHANG Yingxin; SUN Lianping; WANG Beifang; CAO Yongrun; ZHANG Yue; LI Dian; CHEN Daibo; HONG Yongbo; ZHAN Xiaodeng; WU Weixun; CHENG Shihua*; LIU Qun’en*; CAO Liyong

关键词： rice;d Blast Resistance;plant growth

期刊名称： Rice Science

ISSN： 1672-6308

年卷期： 2025 年

页码：

收录情况： SCIE（2025版） ; ; CSCD（2025-2026年度） ; ; 科技核心（2024版） ; ; 农林核心（2024版）

摘要： Iron is an essential nutrient for plant growth, development, and disease resistance. Plants absorb iron through their roots, with citrate playing a key role in xylem transport of insoluble Fe3+. In this study, we identified the cytoplasmic ATP-citrate lyase (ACL) subunit A2 in rice (Oryza sativa L.), OsACL-A2 (Os12g0566300), as a critical factor for iron uptake and transport. The osacl-a2 mutant exhibited reduced leaf iron levels, leading to iron deficiency-induced chlorosis, activated defense signaling, and eventual necrosis in mature leaves. Additionally, blast resistance was weakened in immature osacl-a2 leaves. Exogenous iron supplementation rescued these defects. The mutant displayed reduced ATP-citrate lyase activity but increased citric acid levels compared with its wild type (WT), suggesting that the osacl-a2 mutation impairs enzyme activity. Thus, OsACL-A2-mediated citrate lyase activity plays a vital role in promoting iron uptake and associated blast resistance in rice.

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