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, « La frontière infinie de l'avenir n'est pas l'espace sidéral mais celui, acqueux, qui s'étend sous la surface des océans

R. S. Dietz,

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. Approche-métagénomique-de-la-chimiosynthèse-en, Une de ces communautés est associée à la cavité céphalothoracique et aux pièces buccales hypertrophiées. Celles-ci sont recouvertes par une importante communauté épibionte correspondant à des bactéries chimioautotrophes associées à des dépôts minéraux

, Au sein de ce phylum, deux classes sont dominantes, les Gamma-et les Epsilonproteobacteria, d'autres classes sont également présentes

, Les types métaboliques bactériens ont également pu être étudiés de façon plus approfondie permettant d'avancer encore davantage dans la compréhension de la symbiose entre la crevette et les microorganismes s'y développant. Il a notamment été possible de reconstituer des voies métaboliques entières pour chaque épibionte principal (à savoir Epsilon-et Gammaproteobacteria) ainsi que d'étudier des gènes impliqués notamment dans la réponse aux fluctuations environnementales, dans la communication cellulaire et le quorum-sensing. Le groupe des Zetaproteobacteria a également été étudié, tout d'abord dans le cadre de l'analyse métagénomique, mais également par des approches moléculaires sur des spécimens provenant de plusieurs sites hydrothermaux de la MAR, et ce, afin de mieux définir l'association possible entre ces bactéries ferro-oxydantes et R. exoculata. La seconde communauté associée à R, Une nouvelle classe de Protéobactéries, les Zetaproteobacteria, très récemment décrite comme bactéries libres dans l'environnment hydrothermal