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题名: Highly diverse endophytes in roots of Cycas bifida (Cycadaceae), an ancient but endangered gymnosperm
作者: Zheng, Ying1, 2, 3; Chiang, Tzen-Yuh4; Huang, Chao-Li4; Gong, Xun1, 2
刊名: JOURNAL OF MICROBIOLOGY
关键词: coralloid root ; cyanobacteria ; Cycas ; diversity ; endophyte ; next-generation sequencing technique
英文摘要: As an ancient seed plant, cycads are one of the few gymnosperms that develop a root symbiosis with cyanobacteria, which has allowed cycads to cope with harsh geologic and climatic conditions during the evolutionary process. However, the endophytic microbes in cycad roots remain poorly identified. In this study, using next-generation sequencing techniques, we investigated the microbial diversity and composition of both the coralloid and regular roots of Cycas bifida (Dyer) K.D. Hill. Highly diverse endophytic communities were observed in both the coralloid and regular roots. Of the associated bacteria, the top five families were the Nostocaceae, Sinobacteraceae, Bradyrhizobiaceae, Bacillaceae, and Hyphomicrobiaceae. The Nectriaceae, Trichocomaceae, and Incertae sedis were the predominant fungal families in all root samples. A significant difference in the endophytic bacterial community was detected between coralloid roots and regular roots, but no difference was observed between the fungal communities in the two root types. Cyanobacteria were more dominant in coralloid roots than in regular roots. The divergence of cycad root structures and the modified physiological processes may have contributed to the abundance of cyanobionts in coralloid roots. Consequently, the colonization of cyanobacteria inhibits the assemblage of other endophytes. Our results contribute to an understanding of the species diversity and composition of the cycad-endophyte microbiome and provide an abbreviated list of potential ecological roles of the core microbes present.
出版日期: 2018-05-01
卷号: 56, 期号:5, 页码:337-345
DOI标识: 10.1007/s12275-018-7438-3
语种: 英语
ISSN号: 1225-8873
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/61249
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Econ Plants & Biotechnol, Kunming 650201, Yunnan, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Natl Cheng Kung Univ, Dept Life Sci, Tainan 701, Taiwan

Recommended Citation:
Zheng, Ying,Chiang, Tzen-Yuh,Huang, Chao-Li,et al. Highly diverse endophytes in roots of Cycas bifida (Cycadaceae), an ancient but endangered gymnosperm[J]. JOURNAL OF MICROBIOLOGY,2018,56(5):337-345.
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