polaromonas hydrogenivorans polaromonas hydrogenivorans polaromonas hydrogenivorans is a gram-negative, nonmotile, non-spore-forming, psychrotolerant bacterium from the genus polaromonas, which was isolated from alaskan forest soil. p. hydrogenivorans has the ability to oxidize hydrogen and its colonies are white. polaromonas hydrogenivorans scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: comamonadaceae genus: polaromonas species: p. hydrogenivorans binomial name polaromonas hydrogenivoranssizova and panikov 2007 type strain dsm 17735, nrrl b-41369, vkm b-2398