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Subcellular Energetics and Carbon Storage in Chlamydomonas

Aix Marseille Univ, CEA, CNRS, Institut de Biosciences et Biotechnologies Aix-Marseille, CEA Cadarache CEDEX, 13108 Saint Paul-Lez-Durance, France
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Cells 2019, 8(10), 1154; https://doi.org/10.3390/cells8101154
Received: 1 September 2019 / Revised: 19 September 2019 / Accepted: 24 September 2019 / Published: 26 September 2019
(This article belongs to the Special Issue Chlamydomonas Cell Biology)
Microalgae have emerged as a promising platform for production of carbon- and energy- rich molecules, notably starch and oil. Establishing an economically viable algal biotechnology sector requires a holistic understanding of algal photosynthesis, physiology, cell cycle and metabolism. Starch/oil productivity is a combined effect of their cellular content and cell division activities. Cell growth, starch and fatty acid synthesis all require carbon building blocks and a source of energy in the form of ATP and NADPH, but with a different requirement in ATP/NADPH ratio. Thus, several cellular mechanisms have been developed by microalgae to balance ATP and NADPH supply which are essentially produced by photosynthesis. Major energy management mechanisms include ATP production by the chloroplast-based cyclic electron flow and NADPH removal by water-water cycles. Furthermore, energetic coupling between chloroplast and other cellular compartments, mitochondria and peroxisome, is increasingly recognized as an important process involved in the chloroplast redox poise. Emerging literature suggests that alterations of energy management pathways affect not only cell fitness and survival, but also influence biomass content and composition. These emerging discoveries are important steps towards diverting algal photosynthetic energy to useful products for biotechnological applications. View Full-Text
Keywords: organelle; chloroplast; mitochondria; peroxisome; starch; oil; reductant; phosphorylating power; photosynthesis; metabolic shuttles organelle; chloroplast; mitochondria; peroxisome; starch; oil; reductant; phosphorylating power; photosynthesis; metabolic shuttles
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MDPI and ACS Style

Burlacot, A.; Peltier, G.; Li-Beisson, Y. Subcellular Energetics and Carbon Storage in Chlamydomonas. Cells 2019, 8, 1154.

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