硝酸还原酶是植物体内氮素代谢的关键酶。植物从外界环境中吸收的硝酸盐需要经过一系列酶促反应才能转化成氨基酸和蛋白质,以供生长需要。硝酸还原酶是这个代谢过程中的第一个酶,也是个限速酶,其活力的高低与植物同化NO_3~--N的能力和速度有直接关系。汤玉玮等的研究发现,硝酸还原酶活力与作物的耐肥性呈负相关,并在综述国内外有关研究文献中指出,该酶可以做为作物育种和营养诊断的生化指标。 Nitrate reductase is a key enzyme in plant nitrogen metabolism. Nitrates absorbed by plants from the environment require a series of enzymatic reactions to convert them to amino acids and proteins for growth. Nitrate reductase is the first enzyme in this metabolic process and also a rate-limiting enzyme. The level of its activity is directly related to the ability and speed of plant to assimilate NO 3 - -N. The study of Tangyu Wei et al. Found that the nitrate reductase activity was negatively correlated with the resistance of crops, and pointed out in the literature reviewed at home and abroad that the enzyme could be used as a biochemical indicator for crop breeding and nutritional diagnosis.