Popov V N
Department of Plant Physiology and Biochemistry, Voronezh State University, Voronezh 394693, Russia.
Biochem Soc Trans. 2003 Dec;31(Pt 6):1316-7. doi: 10.1042/bst0311316.
The non-coupled substrate oxidation mediated by components of the electron transport chain that are not coupled to energy accumulation (such as plant alternative oxidase and rotenone-insensitive NADH dehydrogenases) and uncoupled respiration are peculiar features of plant mitochondria. The physiological significance of such energy-wasting oxidation processes is still debated. It is proposed that non-coupled oxidation could regulate the level of reduction of components of the electron transport chain and the rate of one-electron reduction of oxygen, thereby affecting the rate of formation of reactive oxygen species.
由电子传递链中未与能量积累相偶联的组分（如植物交替氧化酶和鱼藤酮不敏感的NADH脱氢酶）介导的非偶联底物氧化以及解偶联呼吸作用是植物线粒体的独特特征。这种浪费能量的氧化过程的生理意义仍存在争议。有人提出，非偶联氧化可以调节电子传递链组分的还原水平以及氧单电子还原的速率，从而影响活性氧的形成速率。
