Lipid content disturbance in the arbuscular mycorrhizal, Glomus irregulare grown in monoxenic conditions under PAHs pollution. – ScienceOpen
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      Lipid content disturbance in the arbuscular mycorrhizal, Glomus irregulare grown in monoxenic conditions under PAHs pollution.

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          Abstract

          Most polycyclic aromatic hydrocarbons (PAHs) are ubiquitous natural and/or anthropogenic pollutants that have adverse effects on the human health and the environment. Little is known about their potential effects on arbuscular mycorrhizal fungi (AMF). Thus, using monoxenic cultures, this work aims to study the impact of increasing concentrations (140 and 280 μM) of two PAHs [anthracene and benzo[a]pyrene (B[a]P)] on Glomus irregulare lipid content in relation with its development. Changes in the total lipids [fatty acids (FA), sterols, phospholipids (PL) and their associated FA (PLFA)] compositions and contents as well as [malondialdehyde (MDA)] production, of the AMF G. irregulare were examined. Direct toxic effects of both PAHs on the AMF were shown as compared to the control culture. The extraradical hyphae length and spore production were drastically restricted in the presence of PAHs. Significant decreases of the main membrane constituents, phosphatidylcholine (PC) and sterols (in particular 24-methycholesterol) were shown in G. irregulare grown under PAHs treatment. Moreover, PAHs exposure caused an oxidative stress in the AMF extraradical structures pointed out by an increase of the lipid peroxidation biomarker production (MDA). All the observed changes were less marked in presence of anthracene, which was found to be less toxic than B[a]P. Taken together, our results suggested that the drastic decrease of the AMF growth under PAHs pollution could partially be explained by depletions in sterols, PC and MDA accumulation.

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          Author and article information

          Journal
          Fungal Biol
          Fungal biology
          Elsevier BV
          1878-6146
          Aug 2011
          : 115
          : 8
          Affiliations
          [1 ] Univ Lille Nord de France, F-59000 Lille, Université du Littoral Côte d'Opale, Unité de Chimie Environnementale et Interactions sur le Vivant, F-62228 Calais, France.
          Article
          S1878-6146(11)00099-7
          10.1016/j.funbio.2011.06.003
          21802059
          5d465755-a70c-4288-9bc2-38ab00a031e6
          Copyright © 2011 The British Mycological Society. Published by Elsevier Ltd. All rights reserved.
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