Colombo Monica, Suorsa Marjaana, Rossi Fabio, Ferrari Roberto, Tadini Luca, Barbato Roberto, Pesaresi Paolo
a Centro Ricerca e Innovazione, Fondazione Edmund Mach , San Michele all'Adige , Italy.
b Molecular Plant Biology, Department of Biochemistry, University of Turku , Turku , Finland.
Plant Signal Behav. 2016;11(4):e1165382. doi: 10.1080/15592324.2016.1165382.
Regulation of photosynthetic electron transport provides efficient performance of oxygenic photosynthesis in plants. During the last 15 years, the molecular bases of various photosynthesis short-term regulatory processes have been elucidated, however the wild type-like phenotypes of mutants lacking of State Transitions, Non Photochemical Quenching, or Cyclic Electron Transport, when grown under constant light conditions, have also raised doubts about the acclimatory significance of these short-regulatory mechanisms on plant performance. Interestingly, recent studies performed by growing wild type and mutant plants under field conditions revealed a prominent role of State Transitions and Non Photochemical Quenching on plant fitness, with almost no effect on vegetative plant growth. Conversely, the analysis of plants lacking the regulation of electron transport by the cytochrome b6f complex, also known as Photosynthesis Control, revealed the fundamental role of this regulatory mechanism in the survival of young, developing seedlings under fluctuating light conditions.
光合电子传递的调节为植物中放氧光合作用的高效运行提供了保障。在过去的15年里，各种光合作用短期调节过程的分子基础已被阐明，然而，缺乏状态转换、非光化学猝灭或循环电子传递的突变体在持续光照条件下生长时呈现出类似野生型的表型，这也引发了人们对于这些短期调节机制对植物性能的适应性意义的质疑。有趣的是，最近在田间条件下种植野生型和突变体植物的研究表明，状态转换和非光化学猝灭对植物适应性具有重要作用，而对植物营养生长几乎没有影响。相反，对缺乏细胞色素b6f复合体电子传递调节（也称为光合作用控制）的植物的分析表明，这种调节机制对于处于波动光照条件下的幼苗的存活具有至关重要的作用。
