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Identification and Molecular Characterization of a New Geminivirus Betasatellite Infecting Malvastrum coromandelianum in China

文献类型： 外文期刊

作者： Tang, Yafei 1 ; He, Zifu 1 ; Du, Zhenguo 1 ; She, Xiaoman 1 ; Lan, Guobing 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Plant Protect Res Inst, Guangzhou 510640, Guangdong, Peoples R China

2.Guangdong Prov Key Lab High Technol Plant Protect, Guangzhou 510640, Guangdong, Peoples R China

关键词： betasatellite;Begomovirus;Malvastrum leaf curl Guangdong virus

期刊名称：JOURNAL OF PHYTOPATHOLOGY （ 影响因子：1.789； 五年影响因子：1.574 ）

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收录情况： SCI

摘要： The complete nucleotide sequence of a satellite molecule associated with Malvastrum leaf curl Guangdong virus (MLCuGdV) infecting M.coromandelianum plants exhibiting leaf curl symptoms in a suburb of Guangzhou, Guangdong Province of China, is described and analysed. The molecule has typical features of betasatellites, containing a single ORF in the complementary-sense strand, an A-rich region, the satellite-conserved region and a stem-loop structure. Compared with the geminivirus betasatellites in GenBank database, this molecule shows the highest nucleotide sequence identity of 71.9% with Tomato leaf curl Philippine betasatellite isolate Laguna1 (ToLCPB, AB307732). Phylogenetic analysis indicates that it is more related to isolate Laguna 1 and Laguna 2 of ToLCPB. According to the proposed species demarcation threshold of betasatellites (78% nucleotide identity), it is a novel betasatellite species, for which we propose the name Malvastrum leaf curl Guangdong betasatellite (MLCuGdB).

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