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- W2741152931 abstract "Diatoms (Bacillariophyceae, Heterokontophytes) are essential aquatic eukaryotes. Their role in the structure and ecology of most of the aquatic ecosystems is crucial. Especially, their photosynthetic activity is responsible for about a quarter of the Earth’s primary productivity as large as the most productive terrestrial ecosystems, even though they represent only few percents of the total plant biomass on the planet. Both planktonic and benthic diatoms tend to dominate in ecosystems characterised by a high turbulence of the water (coasts and estuaries). As a consequence, they have to cope with an underwater light climate with high frequency fluctuations in irradiance coupled with large amplitude. The observation that diatoms grow and dominate under a fluctuating light regime regularly punctuated with excess light exposure, which can be harmful for photosynthesis activity, suggests both an unusual flexibility and ability to protect from light stress. These abilities arise from fast photoprotective processes which allow the diatoms to rapidly regulate the absorption, transfer and use of the light energy used for photochemistry and ultimately for biomass production. While largely studied in higher plants, the function and peculiarities of these mechanisms just start to come to light in diatoms. Here, after a description of the composition and organisation of the photosynthetic apparatus of the diatoms, the main fast photosynthetic regulatory processes are described, their evolution discussed and their possible involvement in the ecophysiology of diatoms in the context of water vertical mixing highlighted." @default.
- W2741152931 created "2017-08-08" @default.
- W2741152931 creator A5004471074 @default.
- W2741152931 date "2007-10-01" @default.
- W2741152931 modified "2023-10-03" @default.
- W2741152931 title "Fast Regulation of Photosynthesis in Diatoms: Mechanisms, Evolution and Ecophysiology" @default.
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