Transcription factor OsSHR2 regulates rice architecture and yield per plant in response to nitrogen

文献类型： 外文期刊

第一作者： Hu, Zhi

作者： Hu, Zhi;Huang, Xu;Xia, Huihuang;Lu, Huixin;Cui, Mengyuan;Yang, Shanshan;Xu, Guohua;Sun, Shubin;Zhang, Zhantian;Wang, Xiaowen;Sun, Yafei;Kant, Surya

作者机构：

关键词： Oryza sativa; Plant height; Root growth; Seed setting rate; Tillering; 1000-grain weight

期刊名称：PLANTA （ 影响因子：4.3； 五年影响因子：4.8 ）

ISSN： 0032-0935

年卷期： 2024 年 259 卷 6 期

页码：

收录情况： SCI

摘要： Main conclusion Mutation of OsSHR2 adversely impacted root and shoot growth and impaired plant response to N conditions, further reducing the yield per plant. Nitrogen (N) is a crucial factor that regulates the plant architecture. There is still a lack of research on it. In our study, it was observed that the knockout of the SHORTROOT2 (OsSHR2) which was induced by N deficiency, can significantly affect the regulation of plant architecture response to N in rice. Under N deficiency, the mutation of OsSHR2 significantly reduced root growth, and impaired the sensitivity of the root meristem length to N deficiency. The mutants were found to have approximately a 15% reduction in plant height compared to wild type. But mutants showed a significant increase in tillering at post-heading stage, approximately 26% more than the wild type, particularly in high N conditions. In addition, due to reduced seed setting rate and 1000-grain weight, mutant yield was significantly decreased by approximately 33% under low N fertilizer supply. The mutation also changed the distribution of N between the vegetative and reproductive organs. Our findings suggest that the transcription factor OsSHR2 plays a regulatory role in the response of plant architecture and yield per plant to N in rice.

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