pseudomonas argentinensis pseudomonas argentinensis pseudomonas argentinensis is a yellow-pigmented, gram-negative, rod-shaped, non-spore-forming, strictly aerobic organism bacterium that infects the rhizospheres of chloris ciliata and pappophorum caespitosum, both grasses native to the chaco region (cordoba) of argentina. pseudomonas argentinensis scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pseudomonadales family: pseudomonadaceae genus: pseudomonas species: p. argentinensis binomial name pseudomonas argentinensispeix, et al. 2005 type strain cect 7010 cip 108775 lmg 22563