期刊
FRONTIERS IN PLANT SCIENCE
卷 12, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2021.778861
关键词
arbuscules; grass; interactions; legume; mycorrhiza; soil nutrients; symbiosis; vesicles
资金
- German Research Foundation (DFG)
- Bielefeld University
Arbuscular mycorrhizal fungi may influence competitive plant interactions, with Lolium multiflorum being the strongest competitor in the presence of AMF. Nitrogen fertilization did not affect the competitive balance, but phosphorus fertilization gave Lolium a competitive advantage over Trifolium. The differential C-P trade benefits driven by AMF may play a role in shaping the competitive outcomes between these two pasture species.
Arbuscular mycorrhizal fungi (AMF) may affect competitive plant interactions, which are considered a prevalent force in shaping plant communities. Aiming at understanding the role of AMF in the competition between two pasture species and its dependence on soil nutritional status, a pot experiment with mycorrhizal and non-mycorrhizal Lolium multiflorum and Trifolium subterraneum was conducted, with manipulation of species composition (five levels), and nitrogen (N)- and phosphorus (P)- fertilization (three levels). In the non-mycorrhizal state, interspecific competition did not play a major role. However, in the presence of AMF, Lolium was the strongest competitor, with this species being facilitated by Trifolium. While N-fertilization did not change the competitive balance, P-fertilization gave Lolium, a competitive advantage over Trifolium. The effect of AMF on the competitive outcome may be driven by differential C-P trade benefits, with Lolium modulating carbon investment in the mycorrhizal network and the arbuscule/vesicle ratio at the cost of Trifolium.
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