Abstract
Understanding the diversity and community structure of arbuscular mycorrhizal fungi (AMF) in extreme conditions is fundamental 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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Acknowledgements
We are grateful to the anonymous reviewers for their very helpful comments and suggestions on an earlier version of the manuscript.
Funding
This work was funded by the Inter-Governmental International Science and Technology Innovation Cooperation (S2016G0053), the National Natural Science Foundation of China (Grant Nos. 31272251 and 31421092), and Hainan Provincial Natural Science Foundation of China (20163125).
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Li, X., Xu, M., Christie, P. et al. Large elevation and small host plant differences in the arbuscular mycorrhizal communities of montane and alpine grasslands on the Tibetan Plateau. Mycorrhiza 28, 605–619 (2018). https://doi.org/10.1007/s00572-018-0850-z
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DOI: https://doi.org/10.1007/s00572-018-0850-z