Unique photosynthetic electron transport tuning and excitation distribution in heterokont algae

Heterokont algae are significant contributors to marine primary productivity. These algae have a photosynthetic machinery that shares many common features with that of Viridiplantae (green algae and land plants). Here we demonstrate, however, that the photosynthetic machinery of heterokont algae res...

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Bibliographic Details
Published in:PloS one 2019-01, Vol.14 (1), p.e0209920-e0209920
Main Authors: Røkke, Gunvor Bjerkelund, Melø, Thor Bernt, Mühlroth, Alice, Vadstein, Olav, Bones, Atle M, Hohmann-Marriott, Martin F
Format: Article
Language:English
Subjects:
Adaptation
Algae
Analysis
Aquatic plants
Biology and Life Sciences
Biotechnology
Carotenoids
Chain dynamics
Chlorophyll
Cytochrome
Electron transport
Electron Transport - physiology
Electron transport chain
Energy distribution
Excitation
Heterokonts
Industrial plants
Light
Machinery and equipment
Organisms
Oxidation-Reduction
Photosynthesis
Photosynthesis - physiology
Photosynthetic reaction centers
Physical Sciences
Plankton
Research and Analysis Methods
Stramenopiles - metabolism
Stramenopiles - physiology
Viridiplantae - metabolism
Viridiplantae - physiology
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Summary:Heterokont algae are significant contributors to marine primary productivity. These algae have a photosynthetic machinery that shares many common features with that of Viridiplantae (green algae and land plants). Here we demonstrate, however, that the photosynthetic machinery of heterokont algae responds to light fundamentally differently than that of Viridiplantae. While exposure to high light leads to electron accumulation within the photosynthetic electron transport chain in Viridiplantae, this is not the case in heterokont algae. We use this insight to manipulate the photosynthetic electron transport chain and demonstrate that heterokont algae can dynamically distribute excitation energy between the two types of photosystems. We suggest that the reported electron transport and excitation distribution features are adaptations to the marine light environment.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0209920