Dynamics of arbuscular mycorrhizal fungal community structure and functioning along a nitrogen enrichment gradient in an alpine meadow ecosystem
| Autor: | Guozhen Du, Nancy Collins Johnson, Lin Mao, Yuxing Chai, Maarja Öpik, Lizhe An, Mingsen Qin, Shengjing Jiang, Xiaolong Zhou, Martti Vasar, Huyuan Feng, Jiajia Luo, Yongjun Liu |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Nitrogen Physiology chemistry.chemical_element Parasitism Plant Science Biology 01 natural sciences Soil Abundance (ecology) Mycorrhizae Ecosystem Mycorrhiza Ecology Phosphorus fungi Community structure Plant community 04 agricultural and veterinary sciences Plants biology.organism_classification Grassland chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Species richness Mycobiome 010606 plant biology & botany |
| Zdroj: | New Phytologist. 220:1222-1235 |
| ISSN: | 0028-646X |
| Popis: | Nitrogen (N) availability is increasing dramatically in many ecosystems, but the influence of elevated N on the functioning of arbuscular mycorrhizal (AM) fungi in natural ecosystems is not well understood. We measured AM fungal community structure and mycorrhizal function simultaneously across an experimental N addition gradient in an alpine meadow that is limited by N but not by phosphorus (P). AM fungal communities at both whole-plant-community (mixed roots) and single-plant-species (Elymus nutans roots) scales were described using pyro-sequencing, and the mycorrhizal functioning was quantified using a mycorrhizal-suppression treatment in the field (whole-plant-community scale) and a glasshouse inoculation experiment (single-plant-species scale). Nitrogen enrichment progressively reduced AM fungal abundance, changed AM fungal community composition, and shifted mycorrhizal functioning towards parasitism at both whole-plant-community and E. nutans scales. N-induced shifts in AM fungal community composition were tightly linked to soil N availability and/or plant species richness, whereas the shifts in mycorrhizal function were associated with the communities of specific AM fungal lineages. The observed changes in both AM fungal community structure and functioning across an N enrichment gradient highlight that N enrichment of ecosystems that are not P-limited can induce parasitic mycorrhizal functioning and influence plant community structure and ecosystem sustainability. |
| Databáze: | OpenAIRE |
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