Heavy metals in sewage sludges contribute to their adverse effects on the arbuscular mycorrhizal fungus<Emphasis Type="Italic">Glomus mosseae</Emphasis> |
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Authors: | Emmanuelle?Jacquot-Plumey Jean-Pierre?Caussanel Silvio?Gianinazzi Diederik?Van?Tuinen Email author" target="_blank">Vivienne?Gianinazzi-PearsonEmail author |
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Institution: | (1) Laboratoire de Phytoparasitologie INRA/CNRS, Centre de Microbiologie du Sol et de l'Environnement, INRA, BV 1540, 21034 Dijon Cedex, France;(2) Laboratoire de Phytoparasitologie INRA/CNRS, Centre de Microbiologie du Sol et de l'Environnement, INRA, BV 1540, 21034 Dijon Cedex, France |
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Abstract: | Applying sewage sludges to agricultural land is a widespread practice because of the sludges’ agronomic value as a source
of plant nutrients and organic matter. Nevertheless, sludges often contain micropollutants that can constitute a menace for
health and the environment. Arbuscular mycorrhizal fungi are sensitive to sewage sludges that have been spiked, or not, with
metallic trace elements (MTE). Here we have investigated if MTE in sewage sludges could be responsible for effects on mycorrhizal
development betweenGlomus mosseae andMedicago truncatula. The impact of a dehydrated or composted urban sewage sludge spiked or not with MTE, was tested on spore germination and
root colonization byG. mosseae. The sewage sludges depressed both the presymbiotic andin planta stages of development of the mycorrhizal fungus. This negative effect was more related to the metallic pollutant contents
of the sludges than to the presence of antagonistic microorganisms or phosphorus. |
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