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豆科作物因其丰富的蛋白质含量而成为人类食品和动物饲料的重要原料。豆科作物具有与根瘤菌形成根瘤固定空气中氮素的能力,这不仅减少了化学肥料的使用,同时还起到培肥地力、改善农田土壤质量、促进农业可持续发展的作用。然而,豆科作物的共生固氮过程极易受环境胁迫、尤其是干旱胁迫的影响。本文简要探讨了根瘤菌在共生固氮应对干旱胁迫过程中所起的作用,着重论述了寄主植物碳代谢、氮代谢及氧气平衡三方面的调节机制,并探讨了氧化胁迫、碳氮互作及硫代谢在调控机制研究中的重要意义。
Legume crops have become important raw materials for human food and animal feed because of their rich protein content. Leguminous crops have the ability to form nodules with rhizobia to fix nitrogen in the air, which not only reduces the use of chemical fertilizers, but also plays a role in fertilizing soil fertility, improving farmland soil quality and promoting agricultural sustainable development. However, symbiotic nitrogen fixation of leguminous crops is extremely vulnerable to environmental stress, especially to drought stress. This paper briefly discussed the role Rhizobium played in symbiotic nitrogen fixation in the process of drought stress. The regulation mechanism of host plant carbon metabolism, nitrogen metabolism and oxygen balance were discussed emphatically. The effects of oxidative stress, carbon-nitrogen interaction and sulfur The Significance of Metabolism in the Study of Regulation Mechanism.