Beyond nutrients: a meta-analysis of the diverse effects of arbuscular mycorrhizal fungi on plants and soils

Ecology
Camille S DelavauxSara E Kuebbing

Abstract

Arbuscular mycorrhizal fungi (AMF) can increase plant fitness under certain environmental conditions. Among the mechanisms that may drive this mutualism, the most studied is provisioning of nutrients by AMF in exchange for carbon from plant hosts. However, AMF may also provide a suite of non-nutritional benefits to plants including improved water uptake, disease resistance, plant chemical defense, soil aggregation, and allelochemical transport and protection. Here, we use a meta-analysis of 93 studies to assess the relative effect of AMF on nutritional and non-nutritional factors that may influence plant fitness. We find that the positive effects of AMF on soil aggregation, water flow and disease resistance are equal to the effect of AMF on plant nitrogen and phosphorus uptake. However, AMF had no effect on the uptake of other nutrients, plant water content, allelopathic transport or production of chemical defense compounds. We suggest future research directions, including experimentally assessing the relative contribution on plant fitness of AMF interactions by untangling the independence of alternative benefits of AMF from an increase in nutrient uptake. This will lead to a more holistic view of the mycorrhizal-plant associat...Continue Reading

References

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Citations

Feb 14, 2018·The New Phytologist·Ylva Lekberg, Thorunn Helgason
Nov 20, 2018·The New Phytologist·Jonathan A Bennett, John Klironomos
Aug 9, 2019·PloS One·Vasilis KokkorisMiranda M Hart
Oct 28, 2019·Ecology Letters·Jonathan A BennettJohn Klironomos
Mar 15, 2020·Annals of the New York Academy of Sciences·Cathy D CollinsMichelle H Hersh
Feb 26, 2019·Nature Ecology & Evolution·Camille S DelavauxJames D Bever
Jul 29, 2019·Environmental Science and Pollution Research International·Shujuan ZhangDafang Fu
Nov 6, 2020·The New Phytologist·Gaowen YangMatthias C Rillig
Dec 4, 2020·Plant, Cell & Environment·Roza D BilasTom Bennett

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