期刊
MYCORRHIZA
卷 28, 期 7, 页码 605-619出版社
SPRINGER
DOI: 10.1007/s00572-018-0850-z
关键词
Arbuscular mycorrhizal fungi; Montane and alpine grasslands; Preferential symbiotic association; Diversity; Elevation
资金
- Inter-Governmental International Science and Technology Innovation Cooperation [S2016G0053]
- National Natural Science Foundation of China [31272251, 31421092]
- Hainan Provincial Natural Science Foundation of China [20163125]
Understanding the diversity and community structure of arbuscular mycorrhizal fungi (AMF) in extreme conditions is fimdamental to predict the occurrence and evolution of either symbiotic partner in alpine ecosystems. We investigated the AMF associations of three plant species at elevations ranging between 3105 and 4556 m a.s.l. on Mount Segrila on the Tibetan Plateau. Three of four locations were studied in two consecutive years. The AMF diversity and community composition in the roots of Carex pseudofoetida, Pennisetum centrasiaticum, and Fragaria moupinensis differed little. However, at high elevations, the abundance of members of Acaulosporaceae increased relative to that of Glomeraceae. Plants at lower elevation sites, where Glomeraceae predominated as root symbionts, had higher leaf nitrogen and phosphorus concentrations than plants at higher elevation sites, where Acaulosporaceae predominated. The overall phylogenetic relatedness of the AMF increased with increasing elevation. This suggests that abiotic filtering may play an important role in the structuring of symbiotic AMF communities along elevational gradients. The functional role of Acaulosporaceae whose relative abundance was found to increase with elevation in alpine environments needs to be clarified in future studies.
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