The calcium sensor OsCBL1 modulates nitrate signaling to regulate seedling growth in rice
文献类型： 外文期刊
作者： Yang, Jing 1 ; Deng, Xiaolong 1 ; Wang, Xiaoxin 1 ; Wang, Jingzhang 1 ; Du, Shiyun 2 ; Li, Yangsheng 1 ;
作者机构： 1.Wuhan Univ, Coll Life Sci, State Key Lab Hybrid Rice, Wuhan, Peoples R China
2.Anhui Acad Agr Sci, Inst Rice Res, Hefei, Peoples R China
期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）
ISSN： 1932-6203
年卷期： 2019 年 14 卷 11 期
页码：
收录情况： SCI
摘要： Nitrate signaling integrates and coordinates gene expression and plant growth; however, the underlying molecular mechanisms involved remain poorly understood. Our previous study revealed that rice calcineurin B-like protein 1 (OsCBL1) modulates lateral root elongation by affecting auxin biosynthesis. Here, we report that OsCBL1 also modulates nitrate signaling to regulate rice seedlings growth. Compared with wild-type seedlings, seedlings of OsCBL1-knockdown (OsCBL1-KD) plants showed a suppressed growth phenotype, which included reduced root and shoot fresh weights and shorter radicles, crown roots, and lateral roots, when grown in nitrogen-free conditions. Although the growth defects of OsCBL1-KD plants could be partially rescued by the addition of nitrate to the growth conditions, the nitrate uptake capability of the OsCBL1-KD plants did not differ from that of wild-type plants as assessed via nitrate content and (NO3-)-N-15 influx experiments. The nitrate-regulated expression of nitrate signal sentinel genes (OsNRT2.1 and OsNRT2.2) was affected in the OsCBL1-KD plants under both long- and short-term nitrate treatments. Overall, our results showed a novel role for OsCBL1 in the regulation of nitrate signaling and nitrate-mediated rice growth.
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