phyllobacterium sophorae phyllobacterium sophorae phyllobacterium sophorae is a gram-negative bacteria in the genus phyllobacterium which has been isolated from the root nodules of the plant sophora flavescens. phyllobacterium sophorae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: phyllobacteriaceae genus: phyllobacterium species: p. sophorae binomial name phyllobacterium sophoraejiao et al. 2015 type strain ccbau 03422, hambi 3508, lmg 27899, ccbau 03415, strain a-6-3