ZmTE1 promotes plant height by regulating intercalary meristem formation and internode cell elongation in maize
文献类型： 外文期刊
作者： Wang, Fengxia 1 ; Yu, Zipeng 1 ; Zhang, Maolin 1 ; Wang, Mengli 1 ; Lu, Xiaoduo 2 ; Liu, Xia 3 ; Li, Yubin 4 ; Zhang, Xia 1 ;
作者机构： 1.Shandong Univ, Coll Life Sci, Key Lab Plant Dev & Environm Adaptat Biol, Minist Educ, Qingdao, Shandong, Peoples R China
2.Anhui Agr Univ, Sch Life Sci, Hefei, Anhui, Peoples R China
3.Minist Agr, Maize Res Inst, Shandong Acad Agr Sci, Natl Engn Lab Wheat & Maize,Key Lab Biol & Genet, Jinan, Peoples R China
4.Qingdao Agr Univ, Coll Agron, Qingdao, Peoples R China
5.Shandong Agr Univ, Coll Life Sci, State Key Lab Crop Biol, Tai An, Shandong, Peoples R China
关键词： Maize; Cell division; Cell elongation; Auxin signalling; Nuclear-cytoplasmic trafficking; Plant height; Phosphorylation; ZmTE1
期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：9.803； 五年影响因子：9.555 ）
ISSN： 1467-7644
年卷期：
页码：
收录情况： SCI
摘要： Maize height is determined by the number of nodes and the length of internodes. Node number is driven by intercalary meristem formation and internode length by intercalary cell elongation, respectively. However, mechanisms regulating establishment of nodes and internode growth are unclear. We screened EMS-induced maize mutants and identified a dwarf mutant zm66, linked to a single base change in TERMINAL EAR 1 (ZmTE1). Detailed phenotypic analysis revealed that zm66 (zmte1-2) has shorter internodes and increased node numbers, caused by decreased cell elongation and disordered intercalary meristem formation, respectively. Transcriptome analysis showed that auxin signalling genes are also dysregulated in zmte1-2, as are cell elongation and cell cycle-related genes. This argues that ZmTE1 regulates auxin signalling, cell division, and cell elongation. We found that the ZmWEE1 kinase phosphorylates ZmTE1, thus confining it to the nucleus and probably reducing cell division. In contrast, the ZmPP2Ac-2 phosphatase promotes dephosphorylation and cytoplasmic localization of ZmTE1, as well as cell division. Taken together, ZmTE1, a key regulator of plant height, is responsible for maintaining organized formation of internode meristems and rapid cell elongation. ZmWEE1 and ZmPP2Ac-2 might balance ZmTE1 activity, controlling cell division and elongation to maintain normal maize growth.
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