Photoprotection capacity differs among diatoms: Possible consequences on the spatial distribution of diatoms related to fluctuations in the underwater light climate
Photoprotection capacity differs among diatoms: Possible consequences on the spatial distribution of diatoms related to fluctuations in the underwater light climate
复制标题
DOI：
10.4319/lo.2007.52.3.1188
复制
发表时间：
2007-05-01
影响因子：
4.5
通讯作者：
Kroth, Peter G.
中科院分区：
文献类型：
--
作者：
Lavaud, Johann;Strzepek, Robert F.;Kroth, Peter G.
在这项研究中，我们显示了一个根本的区别硅藻物种从不同的海洋栖息地，在他们的能力，以科普辐照度的变化。河口物种表现出更高和更灵活的能力比海洋和沿海物种的光保护，当暴露于过量的光，其光合能力的损害，因为光抑制减少。这导致在波动的光制度的增长，赋予河口物种的适应性优势。硅藻以及在更大程度上其他浮游植物占据广泛生态位的能力，关键取决于它们利用水下光气候差异的能力。这些结果可能解释硅藻如何适应在湍流沃茨中维持最佳光合作用的挑战，其中光变化率很高。
In this study, we show a fundamental difference between diatom species from different marine habitats in their ability to cope with changes in irradiance. Estuarine species show a higher and more flexible capacity for photoprotection than oceanic and coastal species, and when exposed to excess light, the impairment of their photosynthetic capacity because of photoinhibition was reduced. This resulted in maintenance of growth in a fluctuating light regime, conferring the estuarine species an adaptive advantage. The ability of diatoms, and to a larger extent other phytoplankton, to occupy a wide range of ecological niches depends critically on their capacity to exploit the differences in underwater light climate. These results might explain how diatoms adapt to the challenge of maintaining optimal photosynthetic production in turbulent waters, in which the rate of light change is high.