Abstract：
Photostasis is the light-dependent maintenance of energy balance associated with cellular homeostasis in photoautotrophs. We review evidence that illustrates how photosynthetic adaptation in polar photoautrophs such as aquatic green algae, cyanobacteria, boreal conifers as well as terrestrial angiosperms exhibit an astonishing plasticity in structure and function of the photosynthetic apparatus. This plasticity contributes to the maintenance of photostasis, which is essential for the long-term survival in the seemingly inhospitable Antarctic and Arctic habitats. However, evidence indicates that polar photoautrophic species exhibit different functional solutions for the maintenance of photostasis. We suggest that this reflects, in part, the genetic diversity symbolized by inherent genetic redundancy characteristic of polar photoautotrophs which enhances their survival in a thermodynamically challenging environment.
摘要：
光稳定是光依赖性维持与光自养生物的细胞稳态相关的能量平衡。我们回顾了一些证据，这些证据说明了诸如水生绿藻之类的极地光自养生物的光合适应，蓝藻,北方针叶树和陆地被子植物在光合装置的结构和功能上表现出惊人的可塑性。这种可塑性有助于维持光停滞，这对于在看似荒凉的南极和北极栖息地的长期生存至关重要。然而,证据表明，极地光自养物种表现出不同的维持光停滞的功能解决方案。我们认为这反映了，在某种程度上,以极地光自养生物固有的遗传冗余特征为标志的遗传多样性，这增强了它们在热力学挑战性环境中的存活。
