| Autor: |
Dan-Hong Li, Wenda Wang, Cuicui Zhou, Yan Zhang, Songhao Zhao, Yi-Ming Zhou, Rong-Yao Gao, Hai-Dan Yao, Li-Min Fu, Peng Wang, Jian-Ren Shen, Tingyun Kuang, Jian-Ping Zhang |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
iScience, Vol 26, Iss 1, Pp 105761- (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2589-0042 |
| DOI: |
10.1016/j.isci.2022.105761 |
| Popis: |
Summary: The light-harvesting complex II of Bryopsis corticulans (B-LHCII), a green alga, differs from that of spinach (S-LHCII) in chlorophyll (Chl) and carotenoid (Car) compositions. We investigated ultrafast excitation dynamics of B-LHCII with visible-to-near infrared time-resolved absorption spectroscopy. Absolute fluorescence quantum yield (ΦFL) of LHCII and spectroelectrochemical (SEC) spectra of Chl a and b were measured to assist the spectral analysis. Red-light excitation at Chl Qy-band, but not Car-band, induced transient features resembling the characteristic SEC spectra of Chl a⋅+ and Chl b⋅−, indicating ultrafast photogeneration of Chl-Chl charge transfer (CT) species; ΦFL and 3Car∗ declined whereas CT species increased upon prolonging excitation wavelength, showing positive correlation of 1Chl∗ deactivation with Chl-Chl CT formation. Moreover, ultrafast Chl b-to-Chl a and Car-to-Chl singlet excitation transfer were illustrated. The red-light induction of Chl-Chl CT species, as also observed for S-LHCII, is considered a general occurrence for LHCIIs in light-harvesting form. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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