Nitrogen fixation, nodule type and occurrence of ureides in legume trees

Abstract

A study of 36 legume trees was made with the objective of relating nitrogen fixation, morphology of nodules and the utilization of ureides in nitrogen transport. Nodulation and acetylene reduction activity were detected in 35 species and ureides in all 36. The greatest concentrations of ureides were observed in certain species of the tribe Dalbergieae which had nodules of the globular type.