Chloroplast NAD(P)H dehydrogenase (NDH) complex, a multiple-subunit complex in the thylakoid membranes mediating cyclic electron transport, is one of the most important alternative electron transport pathways. It was identified to be essential for plant growth and development during stress periods in recent years. The NDH-mediated cyclic electron transport can restore the over-reduction in stroma, maintaining the balance of the redox system in the electron transfer chain and providing the extra ATP needed for the other biochemical reactions. In this review, we discuss the research history and the subunit composition of NDH. Specifically, the formation and significance of NDH-mediated cyclic electron transport are discussed from the perspective of plant evolution and physiological functionality of NDH facilitating plants’ adaptation to environmental stress. A better understanding of the NDH-mediated cyclic electron transport during photosynthesis may offer new approaches to improving crop yield.

中文翻译：

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叶绿体NAD(P)H脱氢酶复合物及其依赖的循环电子传递在光合作用中的意义


叶绿体 NAD(P)H 脱氢酶 (NDH) 复合物是类囊体膜中介导循环电子传递的多亚基复合物，是最重要的替代电子传递途径之一。近年来，它被认为对植物在逆境期间的生长和发育至关重要。 NDH介导的循环电子传递可以恢复基质中的过度还原，维持电子传递链中氧化还原系统的平衡，并为其他生化反应提供所需的额外ATP。在这篇综述中，我们讨论了 NDH 的研究历史和亚基组成。具体而言，从植物进化和NDH促进植物适应环境胁迫的生理功能的角度讨论了NDH介导的循环电子传递的形成和意义。更好地了解光合作用过程中 NDH 介导的循环电子传递可能为提高作物产量提供新方法。