THE SENSITIVITIES OF INTACT SOYBEAN-ROOT NODULES TO THEIR ENVIRONMENT STUDIED BY ESR SPECTROSCOPY
用ESR方法研究大豆根瘤细胞和类菌体对环境的敏感性

ESR spectroscopy is used to spectroscopy is used to study the sensitivity of cells and bacteroids to their environment in intact soybean root nodules inoculated by fast-growing, slow-growing and extra-slow-growing bacteria. Measurements made on different developmental stages and different oxidization of root nodules show that when the root nodules are air-oxidized,some changes related to leghemoglobin and nitrogenase Mo-Fe protein appear in ESR spectra of nodules. By means of these changes the situations of cells and bactroids in the intact measured nodules and the sensitivity of the root nodules to their environment can be understood.