ENO2Affects the Seed Size and Weight by Adjusting Cytokinin Content and Forming ENO2-bZIP75 Complex inArabidopsis thaliana

文献类型： 外文期刊

第一作者： Liu, Zijin

作者： Liu, Zijin;Zheng, Lamei;Ma, Xiaofeng;Wang, Xing;Wu, Yu;Ming, Hainan;Zhang, Genfa;Pu, Li;Wang, Qing

作者机构：

关键词： ENO2; seed size; seed weight; Arabidopsis; bZIP75; plant hormone

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2020 年 11 卷

页码：

收录情况： SCI

摘要： Arabidopsis thaliana ENO2(AtENO2) encodes two proteins AtENO2 (enolase) and AtMBP-1 (c-Myc binding protein 1-like). The loss ofAtENO2function causes the constitutive developmental defects which are correlated with reduced enolase activity, but not AtMBP-1 transcript abundance. However, the regulation mechanism ofAtENO2on the seed properties is still not clear. In this study, we found that the mutation ofAtENO2reduced the seed size and weight. The level of glucose in seed was significantly elevated but that of starch was decreased inAtENO2mutants compared to WT plants. We also found thatAtENO2mutation reduced the content of cytokinin which resulted in smaller cotyledons. The RNA-seq data showed that there were 1892 differentially expressed genes and secondary metabolic pathways were significantly enriched. Instead of AtMBP-1, AtENO2 protein interacted with AtbZIP75 which may mediate the secondary metabolism. Therefore,ENO2alters the size and weight of seeds which is not only regulated by the content of cytokinin and secondary metabolism, but may be affected by the interaction of ENO2 and bZIP57. These results are helpful to understand the novel function ofAtENO2which provide a foundation for further exploration of the key candidate genes for crop breeding.

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