Variovorax
Variovorax is a gram-negative bacterial genus from the family Comamonadaceae. Its designated species is Variovorax paradoxus which arose from the species Alcaligenes paradoxus being grouped under the Variovorax genus. The cell size of Variovorax is 0.5–0.6 μm × 1.2–3.0 μm and the optimal growth temperature is 30 degrees Celsius. The bacteria utilise various organic compounds as a carbon source, including fructose, galactose, and glucose, in order to promote plant growth.