目前关于防止植物光合作用氧化还原失衡的机制的知识,Antioxidants

当前位置： X-MOL 学术 › Antioxidants › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

目前关于防止植物光合作用氧化还原失衡的机制的知识
Antioxidants ( IF 6.0 ) Pub Date : 2021-11-09 , DOI: 10.3390/antiox10111789
María-Cruz González ₁ , Francisco Javier Cejudo ₁ , Mariam Sahrawy ₂ , Antonio Jesús Serrato ₂

Affiliation

光合作用包括一系列氧化还原反应，这些反应是吸收无机碳、氮和硫的还原力和能量的来源，从而产生有机化合物和氧气，从而支持地球上的生命。作为固着生物，植物必须面对环境条件的不断变化，需要调整光合电子传递以防止有害的氧气副产物的积累。光合循环和线性电子流之间的平衡允许维持适合植物需要的适当 NADPH/ATP 比率。此外，植物体内有不同的消散多余能量的机制，以保护和优化不利条件下的光合作用。最近的报告显示了基于氧化还原的二硫醇-二硫化物交换的重要作用，由经典和非典型叶绿体硫氧还蛋白 (TRX) 介导，控制这些光保护机制。此外，膜锚定的 TRX 样蛋白，如 HCF164，将电子从基质 TRX 转移到类囊体腔，根据基质氧化还原平衡在管腔靶标的调节中发挥关键作用。有趣的是，据报道并非所有光保护玩家都受 TRX 控制。在这篇综述中，我们讨论了有关允许适当电子通量避免光合作用氧化还原失衡的不利后果的机制的最新发现。根据基质氧化还原平衡在管腔目标的调节中发挥关键作用。有趣的是，据报道并非所有光保护玩家都受 TRX 控制。在这篇综述中，我们讨论了有关允许适当电子通量避免光合作用氧化还原失衡的不利后果的机制的最新发现。根据基质氧化还原平衡在管腔目标的调节中发挥关键作用。有趣的是，据报道并非所有光保护玩家都受 TRX 控制。在这篇综述中，我们讨论了有关允许适当电子通量避免光合作用氧化还原失衡的不利后果的机制的最新发现。

"点击查看英文标题和摘要"

Current Knowledge on Mechanisms Preventing Photosynthesis Redox Imbalance in Plants

Photosynthesis includes a set of redox reactions that are the source of reducing power and energy for the assimilation of inorganic carbon, nitrogen and sulphur, thus generating organic compounds, and oxygen, which supports life on Earth. As sessile organisms, plants have to face continuous changes in environmental conditions and need to adjust the photosynthetic electron transport to prevent the accumulation of damaging oxygen by-products. The balance between photosynthetic cyclic and linear electron flows allows for the maintenance of a proper NADPH/ATP ratio that is adapted to the plant’s needs. In addition, different mechanisms to dissipate excess energy operate in plants to protect and optimise photosynthesis under adverse conditions. Recent reports show an important role of redox-based dithiol–disulphide interchanges, mediated both by classical and atypical chloroplast thioredoxins (TRXs), in the control of these photoprotective mechanisms. Moreover, membrane-anchored TRX-like proteins, such as HCF164, which transfer electrons from stromal TRXs to the thylakoid lumen, play a key role in the regulation of lumenal targets depending on the stromal redox poise. Interestingly, not all photoprotective players were reported to be under the control of TRXs. In this review, we discuss recent findings regarding the mechanisms that allow an appropriate electron flux to avoid the detrimental consequences of photosynthesis redox imbalances.

更新日期：2021-11-09

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文