丛枝菌根真菌群落与植物系统发育的相关性分析

doi:10.17521/cjpe.2015.0037

摘要/Abstract

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。

关键词: 丛枝菌根真菌, 寄主特异性, 多样性, 进化

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.

Key words: arbuscular mycorrhizal fungi, host-specificity, diversity, evolution

杨海水, 王琪, 郭伊, 熊艳琴, 许明敏, 戴亚军. 丛枝菌根真菌群落与植物系统发育的相关性分析. 植物生态学报, 2015, 39(4): 383-387. DOI: 10.17521/cjpe.2015.0037

YANG Hai-Shui,WANG Qi,GUO Yi,XIONG Yan-Qin,XU Ming-Min,DAI Ya-Jun. Correlation analysis between arbuscular mycorrhizal fungal community and host plant phylogeny. Chinese Journal of Plant Ecology, 2015, 39(4): 383-387. DOI: 10.17521/cjpe.2015.0037

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链接本文: https://www.plant-ecology.com/CN/10.17521/cjpe.2015.0037

https://www.plant-ecology.com/CN/Y2015/V39/I4/383

图/表 4

图1 寄主进化分歧时间(MYA, 百万年)与根内丛枝菌根真菌(AMF)物种丰富度之间的关系。

Fig. 1 Relationship between the time of divergence of hosts (MYA, million year) and the richness of arbuscular mycorrhizal fungal (AMF) species in roots.

图2 丛枝菌根真菌(AMF)物种丰富度在不同植物系统类群之间的分布(平均值±标准误差)。不同小写字母表示不同植物系统类群间差异显著(p < 0.05)。

Fig. 2 Distribution of species richness of arbuscular mycorrhizal fungi (AMF) in different plant phylogenetic groups (mean ± SE). Different lowercase letters indicate significant differences among different plant phylogenetic groups (p < 0.05). D, dicotyledons; M, monocotyledons.

图3 不同植物进化类群根内丛枝菌根真菌群落组成的无度量多维尺度(NMDS)分析。

Fig. 3 Non-metric multidimensional scaling (NMDS) analysis of arbuscular mycorrhizal fungal community composition in different phylogenetic groups. D, dicotyledons; M, monocotyledons.

表1 不同植物进化类群根内丛枝菌根真菌群落组成的单因素非参数MANOVA分析

Table 1 One-way NPMANOVA of arbuscular mycorrhizal fungal community composition in different phylogenetic groups of host plants

	L	H	F	G	NPM	M	NPD	D
L	-	0.02	<0.01	0.46	<0.01	<0.01	<0.01	<0.01
H		-	0.02	0.02	0.01	<0.01	<0.01	<0.01
F			-	0.07	0.01	<0.01	<0.01	<0.01
G				-	0.21	0.58	<0.01	0.68
NPM					-	<0.01	<0.01	<0.01
M						-	<0.01	0.94
NPD							-	<0.01
D								-

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