roseomonas rhizosphaerae roseomonas rhizosphaerae roseomonas rhizosphaerae is a species of gram negative, strictly aerobic, coccobacilli-shaped, pink-colored bacterium. it was first isolated from soil under long-term application of triazofos in yangzhou, jiangsu province, china, and the species was first proposed in 2011. the species name refers to the rhizosphere from which it was first isolated. roseomonas rhizosphaerae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: rhodospirillales family: acetobacteraceae genus: roseomonas species: r. rhizosphaerae binomial name roseomonas rhizosphaeraechen 2014 r. rhizosphaerae can degrade triazofos, an organophosphate pesticide. the optimum growth temperature for r. rhizosphaerae is 28 °c, but can grow in the 15-40 °c range. the optimum ph is 7.5, and can grow in ph 5.0-8.0.