03082nam a2200325Ia 4500 MX-MdCICY 20260521091231.0 CICY B-11009 Mycorrhizal fungal identity and diversity relaxes plant-plant competition Ecology, 92(6), p.1303-1313, 2011 There is a great interest in ecology in understanding the role of soil microbial diversity for plant productivity and coexistence. Recent research has shown increases in species richness of mutualistic soil fungi, the arbuscular mycorrhizal fungi (AMF), to be related to increases in aboveground productivity of plant communities. However, the impact of AMF richness on plant-plant interactions has not been determined. Moreover, it is unknown whether species-rich AMF communities can act as insurance to maintain productivity in a fluctuating environment (e.g., upon changing soil conditions). We tested the impact of four different AMF taxa and of AMF diversity (no AMF, single AMF taxa, and all four together)on competitive interactions between the legumeTrifolium pratenseand the grassLolium multiflorumgrown under two different soil conditions of low and high sand content. We hypothesized that more diverse mutualistic interactions (e.g., when four AMF taxa are present)can ease competitive effects between plants, increase plant growth, and maintain plant productivity across different soil environments. We used quantitative PCR to verify that AMF taxa inoculated at the beginning of the experiment were still present at the end. The presence of AMF reduced the competitive inequality between the two plant species by reducing the growth suppression of the legume by the grass. High AMF richness enhanced the combined biomass production of the two plant species and the yield of the legume, particularly in the more productive soil with low sand content. In the less productive (high sand content)soil, the single most effective AMF had an equally beneficial effect on plant productivity as the mixture of four AMF. Since contributions of single AMF to plant productivity varied between both soils, higher AMF richness would be required to maintain plant productivity in heterogeneous environments. Overall this work shows that AMF diversity promotes plant productivity and that AMF diversity can act as insurance to sustain plant productivity under changing environmental conditions. AMF RICHNESS BIODIVERSITY EFFECT INSURANCE EFFECT LOLIUM MULTIFLORUM OVERYIELDING PLANT COMPETITION QUANTITATIVE PCR SYMBIOSES TRIFOLIUM PRATENSE Wagg, C. Jansa, J. Stadler, M. Schmid, B. Van Derheijden, M.G.A. https://drive.google.com/file/d/184_MB4xTsdu64nNzrurti6pDsZI9wrvA/view?usp=drivesdk Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx Loc REF1 250602s9999 xx |||||s2 |||| ||und|d 21175 21175 0 0 Loc 0 0 F1 CICY CICY RE 2025-06-25 0 B-11009 2025-06-25 14:06:42 2025-06-25 REF1