Plant Diversity ›› 2014, Vol. 36 ›› Issue (03): 331-341.DOI: 10.7677/ynzwyj201413123

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Evolution of MIR166 Gene Family in Land Plants

 ZHAO  Xu-Yao-1、2, CHEN  Si-Yun-1, ZHAO  Lei-1, ZHANG  Xue-Mei-1, MA  Peng-Fei-1, GUO  Zhen-Hua-1   

  1. 1 Germplasm Bank of Wild Species in Southwest China, Kunming Institute of Botany, Chinese Academy of Sciences,
    Kunming 650201,China; 2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2013-05-28 Online:2014-05-25 Published:2014-01-03
  • Supported by:

     The NSFCYunnan province joint foundation (U1136603); the Knowledge Innovation Project of the Chinese Academy of Sciences (KSCX2YWN067); the National Natural Science Foundation of China (30990244); Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry and the Young Academic and Technical Leader Raising Foundation of Yunnan Province (2008PY065); the Western Light Talent Culture Project of the Chinese Academy of Sciences (2010312D11035); and the Yunnan Provincial Government through an innovation team programme


MicroRNA (miRNA) is a class of endogenous noncoding small RNAs with important posttranscriptional regulatory roles in eukaryotes. Plant miRNAs play important roles in the posttranscriptional regulatory network through mediating cleavage or silencing of target mRNAs. As one of the ancient MIRNA family, miR165/166 (miR166) is a key regulator in land plants. In this study, we analyzed the diversity and molecular evolution of MIR166 genes in land plants, and identified the replication and evolution of MIR166 genes in Physcomitrella patens. Homeodomain Leucinezipper of class III (HDZIP III) proteins are important transcription factors in plants, HDZIP III genes are conserved targeting of miR166 in angiosperms, gymnosperms, ferns, and mosses. Here, a preliminary study was conducted to make clear the relationships between HDZIP III genes and miR166 during the evolutionary process.

Key words: miR166, MIRNA gene evolution, gene duplication, HD-ZIP III transcription factors

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