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Provedor de dados:  ArchiMer
País:  France
Título:  Response of CO2-starved diatom Phaeodactylum tricornutum to light intensity transition
Autores:  Heydarizadeh, Parisa
Boureba, Wafaa
Zahedi, Morteza
Huang, Bing
Moreau, Brigitte
Lukomska, Ewa
Couzinet-mossion, Aurelie
Wielgosz-collin, Gaetane
Martin-jezequel, Veronique
Bougaran, Gael
Marchand, Justine
Schoefs, Benoit
Data:  2017-09
Ano:  2017
Palavras-chave:  Phaeodactylum tricornutum
Carbon metabolism
Light regulation
Chlorophyll fluorescence
Pyruvate hub
Resumo:  In this study, we investigated the responses of Phaeodactylum tricornutum cells acclimated to 300 mu mol m(-2) s(-1) photon flux density to an increase (1000 mmol m(-2) s(-1)) or decrease (30 mmol m(-2)s(-1)) in photon flux densities. The light shift occurred abruptly after 5 days of growth and the acclimation to new conditions was followed during the next 6 days at the physiological and molecular levels. The molecular data reflect a rearrangement of carbon metabolism towards the production of phosphoenolpyruvic acid (PEP) and/or pyruvate. These intermediates were used differently by the cell as a function of the photon flux density: under low light, photosynthesis was depressed while respiration was increased. Under high light, lipids and proteins accumulated. Of great interest, under high light, the genes coding for the synthesis of aromatic amino acids and phenolic compounds were upregulated suggesting that the shikimate pathway was activated.
Tipo:  Text
Idioma:  Inglês

Editor:  Royal Soc
Formato:  application/pdf
Fonte:  Philosophical Transactions Of The Royal Society B-biological Sciences (0962-8436) (Royal Soc), 2017-09 , Vol. 372 , N. 1728 , P. 20160396 (1-9)
Direitos:  2017 The Author(s). by the Royal Society. All rights reserved.


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