Laboratoire de Recherches sur les Symbiotes des Racines, Institut National de la Recherche Agronomique, 9, Place Viala, 34060 Montpellier-Cedex, France.
Appl Environ Microbiol. 1987 Mar;53(3):610-2. doi: 10.1128/aem.53.3.610-612.1987.
The effect of the Bradyrhizobium japonicum hydrogenase on nitrogen fixation was evaluated by comparing the growth of Vigna and Glycine species inoculated with a Hup mutant and its Hup revertant. In all experiments, the growth of plants inoculated with the strain without hydrogenase was at least equal to the growth of the strain with hydrogenase. For Glycine usuriensis and Glycine max cv. Hodgson in liquid culture, the growth was higher with the Hup strain. It is possible that reduced rates of nitrogen fixation in the presence of hydrogenase are due to O(2) depletion caused by the hydrogen oxidizing, since the oxygen pressure in the air appears to be a limiting factor of symbiotic nitrogen fixation in the soybean.
通过比较接种 Hup 突变体及其回复突变体的根瘤菌对豇豆属和大豆属植物生长的影响,评估了该根瘤菌氢化酶对固氮的影响。在所有实验中,不具有氢化酶的菌株接种的植物的生长至少与具有氢化酶的菌株的生长相当。在液体培养中,对于野生大豆和霍奇森栽培大豆,Hup 菌株的生长更高。由于氢化酶引起的氧气消耗,可能导致固氮率降低,因为空气中的氧压似乎是大豆共生固氮的限制因素。