Alfalfa Root Nodule Carbon Dioxide Fixation 12: I. Association with Nitrogen Fixation and Incorporation into Amino Acids

摘要

In vivo CO2 fixation activity and in vitro phosphoenolpyruvate carboxylase activity were demonstrated in effective and ineffective nodules of alfalfa (Medicago sativa L.) and in the nodules of four other legume species. Phosphoenolpyruvate carboxylase activity was greatly reduced in nodules from both host and bacterially conditioned ineffective alfalfa nodules as compared to effective alfalfa nodules.