期刊
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
卷 1858, 期 1, 页码 56-63出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.bbabio.2016.10.002
关键词
Chromera velia; Phaeodactylum tricornutum; Red Glade algae; Photosystem I; Fluorescence decay; Red spectral forms; Photochemical yield
资金
- Czech Science Foundation GACR (Grantova agentura Ceske republiky) the Grant Agency of the Czech Republic [GACR-14-15728S]
- Czech Ministry of Education, Youth and Sport [MSMT LO1416, CZ 503 1.05/2.1.00/19.0392]
- Grantova Agentura Ceske Republiky [P501/12/G055]
- GACR [16-10088S]
In the present work, we report the first comparative spectroscopic investigation between Photosystem I (PSI) complexes isolated from two red Glade 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 15-25 ps 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 Glade algae analysed here, carried amongst the most efficient charge separation so far reported for isolated Photosystems. (C) 2016 Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据