| Title: | "Plant growth promotion, metabolite production and metal tolerance of dark septate endophytes isolated from metal-polluted poplar phytomanagement sites" |
| Author(s): | Berthelot C; Leyval C; Foulon J; Chalot M; Blaudez D; |
| Address: | "CNRS, LIEC UMR7360, Faculte des Sciences et Technologies, Universite de Lorraine, BP 70239, F-54506 Vandoeuvre-les-Nancy, France LIEC UMR7360, Faculte des Sciences et Technologies, Universite de Lorraine, BP 70239, F-54506 Vandoeuvre-les-Nancy, France. CNRS, UMR6249 Laboratoire Chrono-Environnement, Pole Universitaire du Pays de Montbeliard, 4 place Tharradin, BP 71427, F-25211, Montbeliard, France UMR6249 Laboratoire Chrono-Environnement, Universite de Bourgogne Franche-Comte, Pole Universitaire du Pays de Montbeliard, 4 place Tharradin, BP 71427, F-25211, Montbeliard, France. CNRS, UMR6249 Laboratoire Chrono-Environnement, Pole Universitaire du Pays de Montbeliard, 4 place Tharradin, BP 71427, F-25211, Montbeliard, France UMR6249 Laboratoire Chrono-Environnement, Universite de Bourgogne Franche-Comte, Pole Universitaire du Pays de Montbeliard, 4 place Tharradin, BP 71427, F-25211, Montbeliard, France Faculte des Sciences et Technologies, Universite de Lorraine, BP 70239, F-54506, Vandoeuvre-les-Nancy, France. CNRS, LIEC UMR7360, Faculte des Sciences et Technologies, Universite de Lorraine, BP 70239, F-54506 Vandoeuvre-les-Nancy, France LIEC UMR7360, Faculte des Sciences et Technologies, Universite de Lorraine, BP 70239, F-54506 Vandoeuvre-les-Nancy, France damien.blaudez@univ-lorraine.fr" |
| ISSN/ISBN: | 1574-6941 (Electronic) 0168-6496 (Linking) |
| Abstract: | "Numerous studies address the distribution and the diversity of dark septate endophytes (DSEs) in the literature, but little is known about their ecological role and their effect on host plants, especially in metal-polluted soils. Seven DSE strains belonging to Cadophora, Leptodontidium, Phialophora and Phialocephala were isolated from roots of poplar trees from metal-polluted sites. All strains developed on a wide range of carbohydrates, including cell-wall-related compounds. The strains evenly colonized birch, eucalyptus and ryegrass roots in re-synthesis experiments. Root and shoot growth promotion was observed and was both plant and strain dependent. Two Phialophora and Leptodontidium strains particularly improved plant growth. However, there was no correlation between the level of root colonization by DSEs and the intensity of growth promotion. All strains produced auxin and six also stimulated plant growth through the release of volatile organic compounds (VOCs). SPME-GC/MS analyses revealed four major VOCs emitted by Cadophora and Leptodontidium The strains exhibited growth at high concentrations of several metals. The ability of metal-resistant DSE strains to produce both soluble and volatile compounds for plant growth promotion indicates interesting microbial resources with high potential to support sustainable production of bioenergy crops within the context of the phytomanagement of metal-contaminated sites" |
| Keywords: | "Ascomycota/isolation & purification Betula *Biodegradation, Environmental Endophytes/isolation & purification/*physiology Indoleacetic Acids/metabolism Metals/*metabolism Plant Development/*physiology Plant Roots Soil Pollutants/*metabolism auxin dark sep;" |
| Notes: | "MedlineBerthelot, Charlotte Leyval, Corinne Foulon, Julie Chalot, Michel Blaudez, Damien eng England 2016/07/02 FEMS Microbiol Ecol. 2016 Oct; 92(10):fiw144. doi: 10.1093/femsec/fiw144. Epub 2016 Jun 29" |
