Cryptochrome 1b represses gibberellin signaling to enhance lodging resistance in maize

文献类型： 外文期刊

第一作者： Chen, Shizhan

作者： Chen, Shizhan;Fan, Xiaocong;Yao, Shuaitao;Liu, Tong;Ding, Wusi;Liu, Lei;Zhang, Menglan;Zhan, Weimin;Sun, Guanghua;Wang, Lijian;Jia, Xiaolin;Yang, Qinghua;Yang, Jianping;Chen, Shizhan;Fan, Xiaocong;Song, Meifang;Yao, Shuaitao;Liu, Tong;Ding, Wusi;Liu, Lei;Zhang, Menglan;Zhan, Weimin;Sun, Guanghua;Wang, Lijian;Jia, Xiaolin;Yang, Qinghua;Yang, Jianping;Song, Meifang;Liu, Lei;Li, Hongdan;Song, Meifang;Yan, Lei;Li, Hongdan;Yang, Jianping;Zhang, Kang

作者机构：

期刊名称：PLANT PHYSIOLOGY （ 影响因子：7.4； 五年影响因子：8.7 ）

ISSN： 0032-0889

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Maize (Zea mays L.) is one of the most important crops worldwide. Photoperiod, light quality, and light intensity in the environment can affect the growth, development, yield, and quality of maize. In Arabidopsis (Arabidopsis thaliana), cryptochromes are blue-light receptors that mediate the photocontrol of stem elongation, leaf expansion, shade tolerance, and photoperiodic flowering. However, the function of maize cryptochrome ZmCRY in maize architecture and photomorphogenic development remains largely elusive. The ZmCRY1b transgene product can activate the light signaling pathway in Arabidopsis and complement the etiolation phenotype of the cry1-304 mutant. Our findings show that the loss-of-function mutant of ZmCRY1b in maize exhibits more etiolation phenotypes under low blue light and appears slender in the field compared with wild-type plants. Under blue and white light, overexpression of ZmCRY1b in maize substantially inhibits seedling etiolation and shade response by enhancing protein accumulation of the bZIP transcription factors ELONGATED HYPOCOTYL 5 (ZmHY5) and ELONGATED HYPOCOTYL 5-LIKE (ZmHY5L), which directly upregulate the expression of genes encoding gibberellin (GA) 2-oxidase to deactivate GA and repress plant height. More interestingly, ZmCRY1b enhances lodging resistance by reducing plant and ear heights and promoting root growth in both inbred lines and hybrids. In conclusion, ZmCRY1b contributes blue-light signaling upon seedling de-etiolation and integrates light signals with the GA metabolic pathway in maize, resulting in lodging resistance and providing information for improving maize varieties. Maize cryptochrome 1b integrates light pathway with gibberellin metabolic pathway to reduce plant height and to enhance lodging resistance.

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