Mixotrophic growth of the extremophile Galdieria sulphuraria reveals the flexibility of its carbon assimilation metabolism.
Galdieria sulphuraria
mixotrophy
photorespiration
photosynthesis
red algae
Journal
The New phytologist
ISSN: 1469-8137
Titre abrégé: New Phytol
Pays: England
ID NLM: 9882884
Informations de publication
Date de publication:
07 2021
07 2021
Historique:
received:
13
11
2020
accepted:
18
03
2021
pubmed:
26
3
2021
medline:
11
6
2021
entrez:
25
3
2021
Statut:
ppublish
Résumé
Galdieria sulphuraria is a cosmopolitan microalga found in volcanic hot springs and calderas. It grows at low pH in photoautotrophic (use of light as a source of energy) or heterotrophic (respiration as a source of energy) conditions, using an unusually broad range of organic carbon sources. Previous data suggested that G. sulphuraria cannot grow mixotrophically (simultaneously exploiting light and organic carbon as energy sources), its photosynthetic machinery being repressed by organic carbon. Here, we show that G. sulphuraria SAG21.92 thrives in photoautotrophy, heterotrophy and mixotrophy. By comparing growth, biomass production, photosynthetic and respiratory performances in these three trophic modes, we show that addition of organic carbon to cultures (mixotrophy) relieves inorganic carbon limitation of photosynthesis thanks to increased CO
Identifiants
pubmed: 33764540
doi: 10.1111/nph.17359
pmc: PMC8252106
doi:
Substances chimiques
Carbon Dioxide
142M471B3J
Carbon
7440-44-0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
326-338Informations de copyright
© 2021 The Authors New Phytologist © 2021 New Phytologist Foundation.
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