Data/hora: 01/06/2024 09:59:47

Provedor de dados: | 5
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; Photosynthesis; 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

Identificador:

http://archimer.ifremer.fr/doc/00395/50620/52341.pdf

DOI:10.1098/rstb.2016.0396

http://archimer.ifremer.fr/doc/00395/50620/

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)

Fonte:

2017 The Author(s). http://royalsocietypublishing.org/licencePublished by the Royal Society. All rights reserved.

info:eu-repo/semantics/openAccess

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