Extremely barophilic bacteria isolated from the Mariana Trench, Challenger Deep, at a depth of 11,000 meters

Article Abstract:

Research was conducted to examine two strains of extreme-barophile bacteria isolated from a sample of sediment taken from the Mariana Trench, Challenger Deep at a depth of 10,898 m by the submersible Kaiko. The DB21MT-2 strain had close resemblance to Shewanella benthica while the DB21MT-5 strain was highly similar to the Moritella genus. Results provide evidence for the existence of obligately barophilic bacteria from the Moritella and Shewanella genera obtained from the world's deepest sediment.

Environmental aspects, Marine bacteria, Mariana Trench

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Novel chemoautotrophic endosymbiosis between a member of the epsilonproteobacteria and the hydrothermal-vent gastropod Alviniconcha aff. hessleri (Gastropoda: Provannidae) from the Indian Ocean

Article Abstract:

An anatomic, molecular phylogenetic, fatty acid profile, bulk and compound-specific carbon isotropic, and enzymatic analyses is conducted. It is done to reveal the occurrence, distribution, and identity of the bacterial endosymbiont in Alviniconcha aff. hessleri from the Indian Ocean and determine the carbon metabolism of the bacterial endosymbiont and the nature of the gastropod/bacterial endosymbiosis.

Indian Ocean, Genetic aspects, Plant molecular genetics

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Host-symbiont relationships in hydrothermal vent gastropods of the genus Alviniconcha from the Southwest Pacific

Article Abstract:

A study aims to identify and clarify the host endosymbiont relationships of the Alviniconcha gastropods from the Southwest Pacific Ocean. Coupling of the host and symbiont lineages from the three Southwest Pacific basins revealed that each of the Alviniconcha lineages harbors different bacterial endosymbionts belonging to either the Greek small letter gamma- or Greek small letter epsilon-Proteobacteria.

Physiological aspects, Host-bacteria relationships

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