Department of Soil Science, 'Luiz de Queiroz' College of Agriculture, University of Sao Paulo, São Paulo, Brazil.
Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands.
Microb Ecol. 2021 Jul;82(1):100-103. doi: 10.1007/s00248-020-01502-z. Epub 2020 Mar 21.
Terrestrial plants establish symbiosis with arbuscular mycorrhizal fungi (AMF) to exchange water and nutrients. However, the extent to which soil biodiversity influences such association remains still unclear. Here, we manipulated the soil microbial diversity using a "dilution-to-extinction" approach in a controlled pot microcosm system and quantified the root length colonization of maize plants by the AMF Rhizophagus clarus. The experiment was performed by manipulating the soil microbiome within a native and foreign soil having distinct physicochemical properties. Overall, our data revealed significant positive correlations between the soil microbial diversity and AMF colonization. Most importantly, this finding opposes the diversity-invasibility hypothesis and highlights for a potential overall helper effect of the soil biodiversity on plant-AMF symbiosis.
陆生植物与丛枝菌根真菌（AMF）建立共生关系，以交换水分和养分。然而，土壤生物多样性对这种共生关系的影响程度仍不清楚。在这里，我们使用“稀释至灭绝”方法在控制盆栽微宇宙系统中操纵土壤微生物多样性，并量化了 AMF 球囊霉属对玉米植物的根长定殖。该实验通过在具有不同物理化学性质的本地和外来土壤中操纵土壤微生物组来进行。总的来说，我们的数据显示土壤微生物多样性与 AMF 定殖之间存在显著的正相关关系。最重要的是，这一发现反对多样性入侵假说，并强调了土壤生物多样性对植物-AMF 共生的潜在整体辅助作用。
