Nitrite-dependent nitric oxide production pathway: implications for involvement of active nitrogen species in photoinhibition in vivo.
Nitrite-dependent nitric oxide production pathway: implications for involvement of active nitrogen species in photoinhibition in vivo.
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DOI：
10.1098/rstb.2000.0708
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发表时间：
2000-10
期刊：
影响因子：
--
通讯作者：
H. Yamasaki
中科院分区：
文献类型：
--
作者：
H. Yamasaki
空气污染研究表明，一氧化氮（NO），一种气态自由基，是一种有效的光合抑制剂，降低了叶片的CO2吸收活性。NO不仅是一种大气污染物，而且是一种内源性代谢产物，可能在调节植物细胞功能中发挥作用。虽然许多研究表明植物中存在一氧化氮合酶（NOS），但NO的来源仍不清楚。许多研究表明，植物细胞具有一条依赖于亚硝酸盐的NO生成途径，这条途径可以与NOS介导的反应区分开来。硝酸还原酶（NR）是近年来发现的一种以NAD（P）H为电子供体，通过单电子还原亚硝酸盐产生NO的酶。本文就植物体内NO的产生机制进行了综述。结合叶片的光氧化胁迫，讨论了NR产生的NO对光合作用的影响。
Air pollution studies have shown that nitric oxide (NO), a gaseous free radical, is a potent photosynthetic inhibitor that reduces CO2 uptake activity in leaves. It is now recognized that NO is not only an air pollutant but also an endogenously produced metabolite, which may play a role in regulating plant cell functions. Although many studies have suggested the presence of mammalian-type NO synthase (NOS) in plants, the source of NO is still not clear. There has been a number of studies indicating that plant cells possess a nitrite-dependent NO production pathway which can be distinguished from the NOS-mediated reaction. Nitrate reductase (NR) has been recently found to be capable of producing NO through one-electron reduction of nitrite using NAD(P)H as an electron donor. This review focuses on current understanding of the mechanism for the nitrite-dependent NO production in plants. Impacts of NO produced by NR on photosynthesis are discussed in association with photo-oxidative stress in leaves.