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Flori 2017 Nat Commun

From Bioblast
Publications in the MiPMap
Flori S, Jouneau PH, Bailleul B, Gallet B, Estrozi LF, Moriscot C, Bastien O, Eicke S, Schober A, Bártulos CR, Maréchal E, Kroth PG, Petroutsos D, Zeeman S, Breyton C, Schoehn G, Falconet D, Finazzi G (2017) Plastid thylakoid architecture optimizes photosynthesis in diatoms. https://doi.org/10.1038/ncomms15885

» Nat Commun 8:15885. PMID: 28631733 Open Access

Flori Serena, Jouneau Pierre-Henri, Bailleul Benjamin, Gallet Benoit, Estrozi Leandro F, Moriscot Christine, Bastien Olivier, Eicke Simona, Schober Alexander, Rio Bartulos Carolina, Marechal Eric, Kroth Peter G, Petroutsos Dimitris, Zeeman Samuel, Breyton Cecile, Schoehn Guy, Falconet Denis, Finazzi Giovanni (2017) Nat Commun

Abstract: Photosynthesis is a unique process that allows independent colonization of the land by plants and of the oceans by phytoplankton. Although the photosynthesis process is well understood in plants, we are still unlocking the mechanisms evolved by phytoplankton to achieve extremely efficient photosynthesis. Here, we combine biochemical, structural and in vivo physiological studies to unravel the structure of the plastid in diatoms, prominent marine eukaryotes. Biochemical and immunolocalization analyses reveal segregation of photosynthetic complexes in the loosely stacked thylakoid membranes typical of diatoms. Separation of photosystems within subdomains minimizes their physical contacts, as required for improved light utilization. Chloroplast 3D reconstruction and in vivo spectroscopy show that these subdomains are interconnected, ensuring fast equilibration of electron carriers for efficient optimum photosynthesis. Thus, diatoms and plants have converged towards a similar functional distribution of the photosystems although via different thylakoid architectures, which likely evolved independently in the land and the ocean.

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