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Population diversity of Pasteuria penetrans from pepper fields and its genetic variation from single root-knot nematodes

文献类型： 外文期刊

作者： Zou, XiaoXiao 1 ; Xiao, Jun 1 ; Huang, HuiQin 1 ; Zhang, XiaoLi 1 ; Zhang, FuTe 1 ; Sun, QianGuang 1 ; Liu, Min 2 ; Bao, 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab Biol & Genet Resources Trop Crops, Minist Agr, Haikou 571101, Hainan, Peoples R China

2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab Biol & Genet Resources Trop Crops, Minis

关键词： 16S rRNA gene;bacterium;biocontrol;gyrB gene;Meloidogyne incognita;Meloidogyne javanica;Meloidogyne spp.;parasite;parsimony informative site;sigE gene

期刊名称：NEMATOLOGY （ 影响因子：1.442； 五年影响因子：1.485 ）

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收录情况： SCI

摘要： Pasteuria penetrans is an obligate parasite of root-knot nematodes. Pepper (Piper nigrum) is one of the main economic crops in Hainan Island, China, and the incidence of root-knot diseases is high. The Pasteuria samples from 20 pepper fields of seven counties in Hainan Island were identified, and the results suggested that there were various P. penetrans populations in the same field but no obvious specificity among different regions. However, five strains appeared to be potentially novel species of the genus Pasteuria by 16S rRNA gene sequence analysis. Additionally, further study showed that a single nematode of Meloidogyne incognita and of M. javanica could be infected by different strains of P. penetrans, and the genetic diversities of P. penetrans between two different host species were found only in gyrB rather than 16S rRNA and sigE gene sequences. These findings will provide some theoretical underpinning for the research of obligate parasitism mechanism between root-knot nematodes and P. penetrans.

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