空気を肥料に変える根粒菌：窒素固定菌と窒素サイクルの秘密

Bacteria that turn air into fertilizer: how nitrogen-fixing microbes drive the nitrogen cycle

Abstract: Some soil bacteria convert inert atmospheric nitrogen gas into ammonia, a form plants can use, in a process called nitrogen fixation. Root nodule bacteria in legumes carry this out using the enzyme nitrogenase and energy from plant sugars. In the nitrogen cycle, other microbes eventually return this nitrogen to the air through nitrification an…