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Molecular evolution and lineage-specific expansion of the PP2C family in Zea mays

文献类型： 外文期刊

作者： Fan, Kai 1 ; Yuan, Shuna 2 ; Chen, Jie 1 ; Chen, Yunrui 1 ; Li, Zhaowei 3 ; Lin, Weiwei 3 ; Zhang, Yongqiang 3 ; Liu, Jia 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Coll Crop Sci, Minist Educ Genet Breeding & Multiple Utilizat Cr, Key Lab, Fuzhou 350002, Fujian, Peoples R China

2.Minist Agr, Danzhou Invest & Expt Stn Trop Crops, Chinese Acad Trop Agr Sci, Rubber Res Inst, Danzhou 571737, Peoples R China

3.Fujian Agr & Forestry Univ, Coll Life Sci, Fujian Prov Key Lab Agroecol Proc & Safety Monito, Fuzhou 350002, Fujian, Peoples R China

4.Fujian Prov Univ, Fujian Agr & Forestry Univ, Key Lab Crop Ecol & Mol Physiol, Fuzhou 35002, Fujian, Peoples R China

关键词： Comparative genomics; Expansion; Functional analysis; Molecular evolution; Monocot; Protein phosphatase 2C

期刊名称：PLANTA （ 影响因子：4.116； 五年影响因子：4.316 ）

ISSN： 0032-0935

年卷期： 2019 年 250 卷 5 期

页码：

收录情况： SCI

摘要： Main conclusion97 ZmPP2Cs were clustered into 10 subfamilies with biased subfamily evolution and lineage-specific expansion. Segmental duplication after the divergence of maize and sorghum might have led to primary expansion of ZmPP2Cs.AbstractThe protein phosphatase 2C (PP2C) enzymes control many stress responses and developmental processes in plants. In Zea mays, a comprehensive understanding of the evolution and expansion of the PP2C family is still lacking. In the current study, 97 ZmPP2Cs were identified and clustered into 10 subfamilies. Through the analysis of the PP2C family in monocots, the ZmPP2C subfamilies displayed biased subfamily molecular evolution and lineage-specific expansion, as evidenced by their differing numbers of member genes, expansion and evolutionary rates, conserved subdomains, chromosomal distributions, expression levels, responsive-regulatory elements and regulatory networks. Moreover, while segmental duplication events have caused the primary expansion of the ZmPP2Cs, the majority of their diversification occurred following the additional whole-genome duplication that took place after the divergence of maize and sorghum (Sorghum bicolor). After this event, the PP2C subfamilies showed asymmetric evolutionary rates, with the D, F-2 and H subfamily likely the most closely to resemble its ancestral subfamily's genes. These findings could provide novel insights into the molecular evolution and expansion of the PP2C family in maize, and lay the foundation for the functional analysis of these enzymes in maize and related monocots.

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