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| 作者姓名： | 杨海水 王琪 郭伊 熊艳琴 许明敏 戴亚军 |
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| 作者单位： | 南京农业大学农学院, 南京 210095 |
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| 基金项目： | 国家自然科学基金;江苏省自然科学基金;中国博士后科学基金 |
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| 摘 要： | 为弄清丛枝菌根(arbuscular mycorrhiza, AM)真菌群落随宿主植物演化的变异规律，通过对MaarjAM数据库进行数据挖掘, 根据每个分子虚拟种(virtual taxa, VT)包含的DNA序列不少于5条的标准, 筛选出188种菌根植物。通过分析植物与其根内AM真菌的关系发现: AM真菌的物种丰富度随着寄主植物的分化而增加; 在不同的植物系统类群中, AM真菌的物种丰富度显著不同; 在起源时间较晚的被子植物和裸子植物中, AM真菌的物种丰富度显著高于起源较早的苔类、角苔类和蕨类植物类群, 而与寄生植物共生的AM真菌物种丰富度与早期植物无显著差异; 不同寄主植物进化类群间AM真菌组成差异显著。以上结果表明: AM真菌群落随着寄主植物进化而发生变化。在进化过程中, 寄主植物倾向于选择保留共生效率较高的AM真菌。
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| 关 键 词： | 丛枝菌根真菌 寄主特异性 多样性 进化 |
| 收稿时间： | 2014-10-11 |
Correlation analysis between arbuscular mycorrhizal fungal community and host plant phylogeny |
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| YANG Hai-Shui,WANG Qi,GUO Yi,XIONG Yan-Qin,XU Ming-Min,DAI Ya-Jun.Aims[J].Acta Phytoecologica Sinica,2015,39(4):383-387. |
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| Authors: | YANG Hai-Shui WANG Qi GUO Yi XIONG Yan-Qin XU Ming-Min DAI Ya-Jun |
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| Affiliation: | College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China |
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| Abstract: | Aims The objective of this study was to understand how arbuscular mycorrhizal (AM) fungal community would vary with plant evolution.
Methods Data-mining was carried out against MaarjAM database with ribosomal small subunit (SSU) gene. We predicted that the richness of root-associated AM fungal species increases from lower to higher modern land plants. Totally, 188 host plant species were selected in this analysis.
Important findings The AM fungal species richness increased with the divergence of host plant species, and significantly differed among plant phylogenetic groups. The more recently diverged host plants (i.e. gymnosperms and angiosperms) harbored higher AM fungal species richness, whereas the earlier-originated plants (liverworts, hornworts and ferns) possessed lower AM fungal species richness. The myco-heterotrophytes in angiosperms showed similarly low richness of AM fungal species to the lower plants. In addition, the AM fungal community composition significantly differed among different plant phylogenetic groups. Findings in this study provided some indirect evidence that AM fungal communities varied with plant evolution. It is suggested that plants might maintain the most effective AM fungi but discard those inefficient ones during evolution. |
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| Keywords: | arbuscular mycorrhizal fungi host-specificity diversity evolution |
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