High photochemical trapping efficiency in Photosystem I from the red clade algae Chromera velia and Phaeodactylum tricornutum
Jazyk angličtina Země Nizozemsko Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
27737767
DOI
10.1016/j.bbabio.2016.10.002
PII: S0005-2728(16)30631-4
Knihovny.cz E-zdroje
- Klíčová slova
- Chromera velia, Fluorescence decay, Phaeodactylum tricornutum, Photochemical yield, Photosystem I, Red clade algae, Red spectral forms,
- MeSH
- Alveolata metabolismus MeSH
- chlorofyl metabolismus MeSH
- fluorescenční spektrometrie MeSH
- fotosystém I - proteinový komplex metabolismus MeSH
- kinetika MeSH
- přenos energie fyziologie MeSH
- Rhodophyta metabolismus MeSH
- rozsivky metabolismus MeSH
- světlosběrné proteinové komplexy metabolismus MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- chlorofyl MeSH
- fotosystém I - proteinový komplex MeSH
- světlosběrné proteinové komplexy MeSH
In the present work, we report the first comparative spectroscopic investigation between Photosystem I (PSI) complexes isolated from two red clade algae. Excitation energy transfer was measured in PSI from Chromera velia, an alga possessing a split PsaA protein, and from the model diatom Phaeodactylum tricornutum. In both cases, the estimated effective photochemical trapping time was in the 15-25ps range, i.e. twice as fast as higher plants. In contrast to green phototrophs, the trapping time was rather constant across the whole emission spectrum. The weak wavelength dependence was attributed to the limited presence of long-wavelength emitting chlorophylls, as verified by low temperature spectroscopy. As the trapping kinetics of C. velia PSI were barely distinguishable from those of P. tricornutum PSI, it was concluded that the scission of PsaA protein had no significant impact on the overall PSI functionality. In conclusion, the two red clade algae analysed here, carried amongst the most efficient charge separation so far reported for isolated Photosystems.
Citace poskytuje Crossref.org
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