The Legume-Root Nodule Symbiosis Nitrogen-fixing bacteria need O,to generate energy for N,fixation,but nitrogenases are inactivated by O2氧气的需求与影响 In the nodule,O,levels are controlled by the O2-binding protein leghemoglobin豆血红蛋白 14 Microbiology,Shanghai Jiao Tong University14 Microbiology, Shanghai Jiao Tong University The Legume–Root Nodule Symbiosis Nitrogen-fixing bacteria need O2 to generate energy for N2 fixation, but nitrogenases are inactivated by O2 氧气的需求与影响 In the nodule, O2 levels are controlled by the O2 -binding protein leghemoglobin豆血红蛋白