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Non-photochemical fluorescence quenching in Chromera velia is enabled by fast violaxanthin de-epoxidation
E. Kotabová, R. Kaňa, J. Jarešová, O. Prášil,
Language English Country Netherlands
Document type Journal Article, Research Support, Non-U.S. Gov't
NLK
Free Medical Journals
from 1968 to 2015
Wiley Free Content
from 1997 to 1 year ago
- MeSH
- Chlorophyta physiology MeSH
- Epoxy Compounds metabolism MeSH
- Fluorescence MeSH
- Photosynthesis MeSH
- Photosystem II Protein Complex metabolism MeSH
- Xanthophylls metabolism MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Non-photochemical quenching (NPQ) is a mechanism protecting photosynthetic organisms against excessive irradiation. Here, we analyze a unique NPQ mechanism in the alga Chromera velia, a recently discovered close relative of apicomplexan parasites. NPQ in C. velia is enabled by an operative and fast violaxanthin de-epoxidation to zeaxanthin without accumulation of antheraxanthin. In C. velia violaxanthin also serves as a main light-harvesting pigment. Therefore, in C. velia violaxanthin acts as a key factor in both light harvesting and photoprotection. This is in contrast to a similar alga, Nannochloropsis limnetica, where violaxanthin has only light-harvesting function.
References provided by Crossref.org
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- $a Non-photochemical quenching (NPQ) is a mechanism protecting photosynthetic organisms against excessive irradiation. Here, we analyze a unique NPQ mechanism in the alga Chromera velia, a recently discovered close relative of apicomplexan parasites. NPQ in C. velia is enabled by an operative and fast violaxanthin de-epoxidation to zeaxanthin without accumulation of antheraxanthin. In C. velia violaxanthin also serves as a main light-harvesting pigment. Therefore, in C. velia violaxanthin acts as a key factor in both light harvesting and photoprotection. This is in contrast to a similar alga, Nannochloropsis limnetica, where violaxanthin has only light-harvesting function.
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