中文关键词岩溶灌丛豆科植物丛枝菌根真菌群落结构 英文关键词karstshrubleguminosaearbuscular mycorrhizal funguscommunity structure

作者	单位	E-mail
梁月明	中国地质科学院岩溶地质研究所, 自然资源部/广西壮族自治区岩溶动力学重点实验室, 桂林 541004 中国科学院亚热带农业生态研究所, 亚热带农业生态过程重点实验室, 长沙 410125	yueming0919@163.com
苏以荣	中国科学院亚热带农业生态研究所, 亚热带农业生态过程重点实验室, 长沙 410125	yrsu@isa.ac.cn
何寻阳	中国科学院亚热带农业生态研究所, 亚热带农业生态过程重点实验室, 长沙 410125
陈香碧	中国科学院亚热带农业生态研究所, 亚热带农业生态过程重点实验室, 长沙 410125

中文摘要 运用末端限制性片段长度多态性T-RFLP法（terminal restriction fragment length polymorphism），检测岩溶区典型13种灌丛植物根系丛枝菌根（arbuscular mycorrhizal，AM）群落结构变化特征，探讨岩溶区AM与宿主植物是否存在选择特性.结果表明，不同灌丛植物根际土壤养分存在显著差异，豆科植物显著高于非豆科植物.聚类分析表明，13种灌丛植物均能被AM侵染，不同灌丛植物根系AM群落结构存在显著差异，尤其豆科与非豆科植物，但AM群落结构在9种非豆科植物间差异显著而在4种豆科植物间则差异不显著.冗余分析表明，影响豆科与非豆科植物根系AM群落结构的因子各异，土壤Olsen-P、pH和全氮是影响岩溶区灌丛植物根系AM群落组成结构的主要因子.研究还表明，岩溶区灌丛植物根系AM与宿主植物具有选择特性，这种选择特性出现在植物功能群的几率比植物种类大，将AM应用于岩溶区植物恢复时，应考虑AM与宿主植物的选择特性问题. 英文摘要 To explore if there are species-preferential characteristics of arbuscular mycorrhizal (AM) and host plants in karst regions, 13 shrub plants (including leguminosae and non-leguminosae) were selected to study the AM community structure of root samples. The soil nutrients in rhizosphere soils significantly differ among shrubs; they are higher in leguminosae than in non-leguminosae. Cluster analysis shows that all 13 shrubs can be infected by AM. Significant differences of the AM community structure were observed among root samples from different shrubs, especially leguminosae and non-leguminosae. Redundancy analysis shows that soil Olsen-P, pH, and total nitrogen significantly influence the AM community structure of plant roots, although the factors affecting this fungus in leguminosae and non-leguminosae differ. These results indicate species-preferential characteristics of AM and host plants in karst regions, especially of the plant function group compared with plant species, suggesting that these characteristics should be taken into account when AM fungi are used for vegetation restoration in karst regions.

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