Biodegration of treated wood waste by native fungal communities of tropical soil in French Guiana

Zaremski Alba, Gastonguay Louis, Zaremski Clara, Chaffanel Fanny, Beauchêne Jacques, Le Floch Gaetan. 2012. Biodegration of treated wood waste by native fungal communities of tropical soil in French Guiana. In : Proceedings IRG Annual Meeting, 6-10 May, 2012, Kuala Lumpur, Malaysia. IRG. s.l. : s.n., 18 p. International Research Group on Wood Protection Annual Meeting. 43, Kuala lumpur, Malaisie, 6 Mai 2012/10 Mai 2012.

Résumé : Woods have been protected with fungicides for a long time, and the effects of these fungicides on soil after being leached into the ground have turned out to be a true environmental issue. It is in this perspective that we are proposing to study fungal communities of these contaminated woods in a purpose of bioremediation. Most of precedent studies have focused on ability of some Basidiomycetes and white rot fungi to degrade these biocide products. Treated and reference (non-treated) woods samples have been incubated in containers of forest soil in Guyana. The first two samplings of these woods and soils have been realized five months apart. A crop and molecular study allowed us to isolate and identify forty strains of Ascomycetes able to develop on wood and resist xenobiotics. Until now, no Ascomycete was known to resist xenobiotics. Furthermore, a study of fungal communities of the woods and soil were done by D-HPLC and SSCP, and then analyzed by ACP. According to these analyses, biocides are leached in the soil and have an impact on these fungal communities, which are different depending on time of sampling and the way wood is processed.

Mots-clés Agrovoc : déchet de bois, biodégradation, pesticide, Ascomycota, Basidiomycota, bioremédiation, champignon du sol, pollution du sol

Mots-clés géographiques Agrovoc : Guyane française, France

Mots-clés complémentaires : Séquencage

Classification Agris : K50 - Technologie des produits forestiers
J11 - Manutention, transport, stockage et conservation des produits d'origine végétale
P02 - Pollution

Auteurs et affiliations

• Zaremski Alba, CIRAD-BIOS-UMR AGAP (FRA)
• Gastonguay Louis, IREQ (CAN)
• Zaremski Clara
• Chaffanel Fanny, Université de Brest (FRA)
• Beauchêne Jacques, CIRAD-ES-UMR Ecofog (GUF) ORCID: 0000-0003-4578-3670
• Le Floch Gaetan, Université de Brest (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/564934/)

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