生物
生长素
转录因子
德隆
细胞生物学
胚胎干细胞
胚胎发生
胚胎
拟南芥
表型
激酶
磷酸化
突变体
油菜素甾醇
遗传学
基因
泛素连接酶
泛素
作者
Yan Wang,Jianghai Xu,Jingjuan Yu,Dong Zhu,Qian Zhao
出处
期刊:Plant Science
[Elsevier]
日期:2022-05-01
卷期号:318: 111221-111221
被引量:8
标识
DOI:10.1016/j.plantsci.2022.111221
摘要
Grain size and weight are closely related to the yield of cereal crops. Abnormal development of the embryo, an important part of the grain, not only affects crop yield but also impacts next-generation survival. Here, we found that maize GSK3-like kinase ZmSK2, a homolog of BIN2 in Arabidopsis, is involved in embryonic development. ZmSK2 overexpression resulted in severe BR defective phenotypes and arrested embryonic development at the transition stage, while the zmsk2 knockout lines showed enlarged embryos. ZmSK2 interacts with Aux/IAA-transcription factor 28 (ZmIAA28), a negative regulator of auxin signaling, and the interaction region is the auxin degron "GWPPV" motif of ZmIAA28 domain II. Coexpression of ZmSK2 with ZmIAA28 increased the accumulation of ZmIAA28 in maize protoplasts, which may have been due to phosphorylation by ZmSK2. In conclusion, this study reveals the function of ZmSK2 in maize embryonic development and proposes that ZmSK2-ZmIAA28 may be another link in the signaling pathway that integrates BR and auxin.
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