TAILIEUCHUNG - Báo cáo lâm nghiệp: "Spatial and temporal diversity of wood decomposer communities in different forest stands, determined by ITS rDNA targeted TGGE"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Spatial and temporal diversity of wood decomposer communities in different forest stands, determined by ITS rDNA targeted TGGE. | Ann. For. Sci. 63 2006 547-556 INRA EDP Sciences 2006 DOI forest 2006037 547 Original article Spatial and temporal diversity of wood decomposer communities in different forest stands determined by ITS rDNA targeted TGGE Ariana KULHÁNKOVÁa b Thierry BÉGUIRISTAINb Judicael MOUKOUMIa b Jacques BÉRTHÉLlNb Jacques RANGÉRa a INRA Centre de Nancy Unité Biogéochimie des Écosystèmes Forestiers 54280 Champenoux France b LIMOS CNRS UHP UMR 7137 Université Henri Poincaré BP 239 54506 Vandreuvre-les-Nancy France Received 3 March 2005 accepted 22 March 2006 Abstract - The aim of this study was to determine the dynamics of colonisation and composition of the wood-decomposer community in a native forest and four monocultures over time. A fingerprinting method of TGGE temperature gradient gel electrophoresis with rDNA amplified by ITS1F and ITS2 primer pairs was optimized and used as a culture-independent approach to determine the dominant fungal species and biodiversity over a two-year period of decomposition of beech-wood samples. The bacterial community after two years was also investigated. Data showed that each tree species as well as sampling date displayed the characteristic community structure. There was no strong decrease in microbial species richness or Shannon-Wiener diversity index caused by a change of tree species. Nevertheless a strong shift in decomposer community structure was evident among the tree species both for fungi and bacteria. The effect of environmental conditions was also significant. wood decomposers forest ITS TGGE Résumé - Étude par TGGE de la diversité spatiale et temporelle des communautés de décomposeurs du bois en fonction des essences fores-tières. L objectif de cette étude était de caractériser la dynamique de colonisation d un matériau modèle du bois de hêtre par les lignivores au cours de la décomposition dans une forêt native et sous quatre essences de substitution à la forêt native feuillue. La technique d empreinte génétique de TGGE

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