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Communication Dans Un Congrès Année : 2008

METAGENOMIC: INSIGHTS ON EXTREME METABOLISM

Elisabeth Navarro
Riccardo Scorretti
Aurélie Faugier
  • Fonction : Auteur
  • PersonId : 758894
  • IdRef : 150107765
Timothy M Vogel

Résumé

Due to their geochemical characteristics, some soil can be considered as extreme. Such is the case in New Caledonia, where the ultramafic soils are characterized by their deficiency in essential elements, and their excess in heavy metals, particularly nickel. This phenomenon is amplified in mine spoils where carbon and nitrogen concentrations are extremely low. The aim of this work was to evaluate the adaptive strategies of soil microbial communities to extreme environments. A combination of metagenomic tools were used (16S rRNA libraries, microarray, cosmid clone libraries and pyrosequencing) and a comparative metagenomic analysis, including metagenomes of “classical “ soils, was performed to demonstrate the differences between bacterial communities and their functions. Statistical differences were examined in order to explore genes/populations specific to extreme soils. Results highlighted the original bacterial community structure and metabolism in the mine spoils, characteristic of its extreme edaphic conditions. Microbial communities evolved by favoring biosynthetic pathways and minimizing nutrient loss.
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Dates et versions

hal-00399436 , version 1 (26-06-2009)

Identifiants

  • HAL Id : hal-00399436 , version 1

Citer

Elisabeth Navarro, Riccardo Scorretti, Aurélie Faugier, Timothy M Vogel. METAGENOMIC: INSIGHTS ON EXTREME METABOLISM. The 12th International Symposium on Microbial Ecology (ISME 12), Aug 2008, Caims, Australia. ⟨hal-00399436⟩
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