Hypothesis A binary redox control mode as universal regulator of photosynthetic light acclimation
Hypothesis A binary redox control mode as universal regulator of photosynthetic light acclimation
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DOI：
10.4161/psb.5.1.10294
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发表时间：
2010-01-01
影响因子：
2.9
通讯作者：
Pfannschmidt, Thomas
中科院分区：
文献类型：
--
作者：
Braeutigam, Katharina;Dietzel, Lars;Pfannschmidt, Thomas
在自然界中，植物在主导光照下经历相当大的变化，这会大大降低光合效率和产量。这种不利影响被驯化反应所抵消，驯化反应通过光合机构的结构重构来确保高光合生产力。这些驯化反应由来自两个氧化还原化合物池（质体醌和硫氧还蛋白池）的还原-氧化（氧化还原）信号控制。然而，这两个氧化还原信号系统对这一过程的相对影响仍然存在争议。最近，我们发现光合作用以综合的方式控制核基因表达和细胞代谢物状态，从而稳定植物的不同能量需求。在这里，我们提出了一个新的模型的基础上的二元氧化还原控制模式来解释植物初级生产力的光环境的适应。Plastoquinone和硫氧还蛋白池，提出了定义特定的环境条件下合作，并启动适当的驯化反应，其氧化还原状态的四个二元组合控制。我们的模型表明，一个层次的氧化还原调节网络，控制植物初级生产力和支持的概念，光合作用是影响植物生长和发育的环境传感器。
In nature, plants experience considerable changes in the prevailing illumination, which can drastically reduce photosynthetic efficiency and yield. Such adverse effects are counterbalanced by acclimation responses which ensure high photosynthetic productivity by structural reconfiguration of the photosynthetic apparatus. Those acclimation responses are controlled by reduction-oxidation (redox) signals from two pools of redox compounds, the plastoquinone and the thioredoxin pools. The relative impact of these two redox signaling systems on this process, however, remains controversial. Recently, we showed that photosynthesis controls nuclear gene expression and cellular metabolite states in an integrated manner, thus, stabilizing the varying energetic demands of the plant. Here, we propose a novel model based on a binary redox control mode to explain adaptation of plant primary productivity to the light environment. Plastoquinone and thioredoxin pools are proposed to define specific environmental situations cooperatively and to initiate appropriate acclimation responses controlled by four binary combinations of their redox states. Our model indicates a hierarchical redox regulation network that controls plant primary productivity and supports the notion that photosynthesis is an environmental sensor affecting plant growth and development.