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Isolation and Characterization of Ftsz Genes in Cassava

文献类型： 外文期刊

作者： Geng, Meng-Ting 1 ; Min, Yi 2 ; Yao, Yuan 1 ; Chen, Xia 3 ; Fan, Jie; Yuan, Shuai; Wang, Lei; Sun, Chong; Zhang, 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Haikou 571101, Hainan, Peoples R China

2.Hainan Univ, Inst Trop Agr & Forestry, Hainan Key Lab Sustainable Utilizat Trop Bioresou, Haikou 570228, Hainan, Peoples R China

3.Hainan Univ, Inst Trop Agr & Forestry, Hainan Key Lab Sustainable Utilizat Tro

关键词： isolation;FtsZ;cassava;subcellular localization;gene expression;phytohormone response;plastid division;transgenic Arabidopsis

期刊名称：GENES （ 影响因子：4.096； 五年影响因子：4.339 ）

ISSN： 2073-4425

年卷期： 2017 年 8 卷 12 期

页码：

收录情况： SCI

摘要： The filamenting temperature-sensitive Z proteins (FtsZs) play an important role in plastid division. In this study, three FtsZ genes were isolated from the cassava genome, and named MeFtsZ1, MeFtsZ2-1, and MeFtsZ2-2, respectively. Based on phylogeny, the MeFtsZs were classified into two groups (FtsZ1 and FtsZ2). MeFtsZ1 with a putative signal peptide at N-terminal, has six exons, and is classed to FtsZ1 clade. MeFtsZ2-1 and MeFtsZ2-2 without a putative signal peptide, have seven exons, and are classed to FtsZ2 clade. Subcellular localization found that all the three MeFtsZs could locate in chloroplasts and form a ring in chloroplastids. Structure analysis found that all MeFtsZ proteins contain a conserved guanosine triphosphatase (GTPase) domain in favor of generate contractile force for cassava plastid division. The expression profiles of MeFtsZ genes by quantitative reverse transcription-PCR (qRT-PCR) analysis in photosynthetic and non-photosynthetic tissues found that all of the MeFtsZ genes had higher expression levels in photosynthetic tissues, especially in younger leaves, and lower expression levels in the non-photosynthetic tissues. During cassava storage root development, the expressions of MeFtsZ2-1 and MeFtsZ2-2 were comparatively higher than MeFtsZ1. The transformed Arabidopsis of MeFtsZ2-1 and MeFtsZ2-2 contained abnormally shape, fewer number, and larger volume chloroplasts. Phytohormones were involved in regulating the expressions of MeFtsZ genes. Therefore, we deduced that all of the MeFtsZs play an important role in chloroplast division, and that MeFtsZ2 (2-1, 2-2) might be involved in amyloplast division and regulated by phytohormones during cassava storage root development.

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