【摘要】 一氧化氮(NO)作为一种气体信号分子,在植物生理过程中发挥重要作用,它参与调节植物的生长、发育及对外界环境的应激反应。植物体内主要通过酶催化途径和非酶催化途径合成NO。酶催化途径合成NO的主要酶包括一氧化氮合酶(nitric oxide synthase,NOS)和硝酸还原酶(nitrate reductase,NR),以及在某些植物的特定组织或器官或在特殊环境条件下存在的一氧化氮氧化还原酶(nitric oxide oxidoreductase,Ni-NOR)和黄嘌呤氧化还原酶(xanthine oxidoreductase,XOR)。非酶催化合成途径主要是在酸性和还原剂存在条件下将亚硝酸盐还原成NO。该文主要结合研究方法,综述了植物体内NO合成途径的研究进展,为植物体内NO信号的作用机理的深入研究提供信息资料。更多还原

【Abstract】 Nitric oxide(NO) has emerged as a key gas signaling molecule in plants and plays an important role in plant physiology.NO regulates plant growth,development and response to environmental stimulus.There are two potential sources of NO in plant:enzymatic sources and nonenzymatic sources.The main enzymatic sources include nitric oxide synthase(NOS) and nitrate reductase(NR).There are still other enzymes which also generate NO in specific tissues and organs or under special conditions,such as nitric oxide oxidoreductase(Ni-NOR) and xanthine oxidoreductase(XOR).NO can also be generated from nonenzymatic sources under the conditions of acid and reductant which can convert NO2-to NO.This review summarizes the NO biosynthesis pathway in plant in combination with research methods,which provides a basis for the mechanism of NO functions in plant.更多还原