Mycorrhizal phenotypes and the Law of the Minimum

© 2014 The Authors New Phytologist © 2014 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 205(2015), 4 vom: 07. März, Seite 1473-1484
1. Verfasser: Johnson, Nancy Collins (VerfasserIn)
Weitere Verfasser: Wilson, Gail W T, Wilson, Jacqueline A, Miller, R Michael, Bowker, Matthew A
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't arbuscular mycorrhizas context dependency light mutualism nitrogen (N) parasitism phosphorus (P) stoichiometry mehr... Fertilizers Soil Phosphorus 27YLU75U4W Carbon 7440-44-0 Nitrogen N762921K75
Beschreibung
Zusammenfassung:© 2014 The Authors New Phytologist © 2014 New Phytologist Trust.
Mycorrhizal phenotypes arise from interactions among plant and fungal genotypes and the environment. Differences in the stoichiometry and uptake capacity of fungi and plants make arbuscular mycorrhizal (AM) fungi inherently more nitrogen (N) limited and less phosphorus (P) limited than their host plants. Mutualistic phenotypes are most likely in P-limited systems and commensal or parasitic phenotypes in N-limited systems. Carbon (C) limitation is expected to cause phenotypes to shift from mutualism to commensalism and even parasitism. Two experiments compared the influence of fertilizer and shade on mycorrhizas in Andropogon gerardii across three naturally N-limited or P-limited grasslands. A third experiment examined the interactive effects of N and P enrichment and shade on A. gerardii mycorrhizas. Our experiments generated the full spectrum of mycorrhizal phenotypes. These findings support the hypothesis that mutualism is likely in P-limited systems and commensalism or parasitism is likely in N-limited systems. Furthermore, shade decreased C-assimilation and generated less mutualistic mycorrhizal phenotypes with reduced plant and fungal biomass. Soil fertility is a key controller of mycorrhizal costs and benefits and the Law of the Minimum is a useful predictor of mycorrhizal phenotype. In our experimental grasslands arbuscular mycorrhizas can ameliorate P-limitation but not N-limitation
Beschreibung:Date Completed 28.09.2015
Date Revised 18.04.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.13172