McNichol is specifically interested in a class of microbes called Epsilonproteobacteria, that dominates the vents.
Rather than photosynthesis, these Epsilonproteobacteria survive using chemosynthesis: To build their bodies, they extract energy from inorganic chemicals that leach out of rocks below the seafloor and into the vent fluid.
Within Proteobacteria, the gut digesta (61-70%), egested fecal pellets (52-87%), and tank water (36%) were dominated by class Gammaproteobacteria; the pharynx tissue (31-45%) and feed (24%) by class Alphaproteobacteria; and the gut tissue by Epsilonproteobacteria
in humans, New Zealand [letter].
Furthermore, chemosynthetic symbionts are not limited to the Gammaproteobacteria, as sulfur-oxidizing bacteria from the Alpha-and Epsilonproteobacteria have also formed associations with numerous marine invertebrates (for example, Polz and Cavanaugh, 1995; Suzuki et al.
Dual symbiosis of the vent shrimp Rinticaris exoculata with filamentous gamma- and epsilonproteobacteria at four Mid-Atlantic Ridge hydrothermal vent fields.
2007), usando los metodos moleculares de reaccion en cadena de polimerasa (PCR) y electroforesis en gel de gradiente desnaturalizante (DGGE), demostraron la presencia de Epsilonproteobacteria
, Bacteroidetes, Geobactereaceae, Chlorobi y Chloroflexi en muestras de aguas subterraneas contaminadas con uranio (U) y tecnecio (Tc) sometidas a procesos de biosaneamiento.
Phylum, class Detected by Detected by cloning microarray and sequencing Actinobacteria, Yes Yes Actinobacteria Bacteroidetes, Yes No Bacteroidetes Bacteroidetes, Yes Yes Sphingobacteria Chloroflexi, Chloroflexi Yes No Cyanobacteria, Yes No Cyanobacteria Cyanobacteria, Yes No Cyanophyceae Deinococcus-Thermus, Yes No Thermus Firmicutes, Bacilli Yes Yes Firmicutes, Clostridia Yes No Planctomycetes, Yes No Planctomycetacia Proteobacteria, Yes Yes Alphaproteobacteria Proteobacteria, Yes No Betaproteobacteria Proteobacteria, Yes No Deltaproteobacteria Proteobacteria, Yes Yes Gammaproteobacteria Proteobacteria, Yes No Epsilonproteobacteria
Overall, the results from our culture-independent study indicate that sea urchin preferentially selects members of the class Epsilonproteobacteria
from the likely source of the feed (0.
Short, thin Gammaproteobacteria appear red, and longer, stouter Epsilonproteobacteria
The class Epsilonproteobacteria is a distinct, diverse bacterial group containing [approximately equal to] 100 taxa (3), including Campylobacter jejuni, recognized as the most frequent bacterial cause of human gastroenteritis worldwide (4,5).
Fecal DNA extracts were examined with the PCR-DGGE for Epsilonproteobacteria as described (8).