数字农科院2.0

OsELF3.1-OsCATA-Ghd7 Pathway Regulates Rice Heading

文献类型： 外文期刊

作者： WU Zhaozhong#; ZHONG Zhengzheng#; XU Peng; LIU Ling; WANG Beifang; YANG Qinqin; WEN Xiaoxia; MA Guifang; LUO Mili; ZHANG Yingxin; LIU Qunen; PENG Zequn; ZHAN Xiaodeng; CAO Liyong*; CHENG Shihua*; WU Weixun*

关键词： : rice; heading date; OsELF3.1; Ghd7; OsCATA

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： Rice, a critical global staple crop, relies heavily on heading date, a key agronomic trait marking the transition from vegetative to reproductive growth. Understanding the genetic regulation of heading date is vital for nhancing the adaptability of high-quality rice varieties across diverse geographical regions and for bolstering local food security. In this study, we uncovered a novel role for OsCATA, a catalase gene, in the regulation of photoperiodic flowering in rice. We identified a novel allele of OsELF3.1, whose mutation resulted in delayed heading. Further analyses revealed that OsELF3.1 physically interacted with OsCATA. Notably, OsCATA exhibited rhythmic expression patterns similar to OsELF3.1 and, when mutated, also delayed flowering. Expression analyses showed that the delayed heading phenotype could be attributed to elevated Ghd7 expression under both long-day and short-day conditions, with OsCATA expression positively regulated by OsELF3.1. Double mutants of OsELF3.1 and OsCATA displayed a heading delay similar to that of oself3.1 single mutants. Additionally, OsELF3.1 could interact with Ghd7 in vivo, alleviating its suppression of Ehd1. Luciferase assays confirmed that Ghd7 repressed Ehd1 expression, while OsELF3.1 mitigated this repression. Collectively, our findings reveal that OsCATA is critical in suppressing Ghd7 expression through the OsELF3.1-OsCATA-Ghd7 transcriptional pathway, thereby regulating rice heading.

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