Occurrence and distribution of arbuscular mycorrhizal fungal species in three types of grassland community of the Tibetan Plateau
Occurrence and distribution of arbuscular mycorrhizal fungal species in three types of grassland community of the Tibetan Plateau
复制标题
青藏高原三类草原群落丛枝菌根真菌的发生与分布
DOI：
10.1007/s11284-009-0618-1
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发表时间：
2009-11-01
影响因子：
2
通讯作者：
Li, X. L.
中科院分区：
文献类型：
--
作者：
Gai, J. P.;Christie, P.;Li, X. L.
在海拔3500 ~ 5200 m的山地灌丛草地、高寒草原和高寒草甸样地调查了AM真菌孢子群落及其分布格局。在青藏高原。于2004年5月下旬，从主要植物和常见植物的根区采集了32个具有代表性的土壤样品。共检测到AM真菌6属23种（Acaulospora、Entrophospora、Glomus、Pacispora、Paraglomus和Scutellospora），物种丰富度为5.3 ± 0.8 ~ 10.5 ± 2.5。3种植被类型中均检测到Glomus mosseae、Glomus intraradices和Scutellospora calospora，其中Glomus种类最多，无梗囊霉主要分布在高寒草原和高寒草甸，Scutellospora主要分布在山地灌丛草地。在物种水平上，高山灌丛以藓类球囊霉（Glomus mosseae）为主，高寒草原以光滑无梗囊霉（Acaulospora laevis）和太平洋囊霉（Pacispora lavans）为主，高寒草甸以光滑无梗囊霉（Acaulospora laevis）、太平洋囊霉（Pacispora lavans）和明球囊霉（Glomus claroideum）为主。AM真菌在不同植被类型中的分布格局表明，山地灌丛草地的AM真菌物种丰度和多样性最低。气候条件，特别是温度和土地利用强度可能是影响AM真菌群落的最重要因素。
Arbuscular mycorrhizal (AM) fungal spore communities and distribution patterns were surveyed in montane scrub grassland, alpine steppe, and alpine meadow sites at altitudes ranging from 3,500 to 5,200 m a.s.l. on the Tibetan Plateau. Thirty-two representative soil samples were collected from the root zone of the dominant and common plant species in late May 2004. Twenty-three AM fungal species representing six genera (Acaulospora,Entrophospora,Glomus,Pacispora,Paraglomus, andScutellospora) were detected and species richness varied from 5.3 ± 0.8 to 10.5 ± 2.5 per site. Some AM fungal species were restricted to one vegetation type andGlomus mosseae,Glomus intraradices, andScutellospora calosporawere detected in all three vegetation types.Glomusspecies were found to be the most frequent and abundant in all three vegetation types.Acaulosporaoccurred mostly in the alpine steppe and alpine meadow.Scutellosporaoccurred mostly in montane scrub grassland. At the species level,Glomus mosseaewas dominant in the montane scrub,Acaulospora laevisandPacispora scintillanswere dominant in the alpine steppe, andAcaulospora laevis,Pacispora scintillans, andGlomus claroideumdominated the alpine meadow. It was evident from the distribution pattern of AM fungi in the different vegetation types that the abundance and diversity of AM fungal species were lowest in the montane scrub grassland than the other two plant communities. Climatic conditions, especially temperatures, and intensity of land use may be the most important factors influencing the AM fungal community.