Dec, 2020
Adaptation of light-harvesting and energy-transfer processes of a diatom Chaetoceros gracilis to different light qualities
PHOTOSYNTHESIS RESEARCH
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- Volume
- 146
- Number
- 1-3
- First page
- 87
- Last page
- 93
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1007/s11120-020-00713-2
- Publisher
- SPRINGER
Diatoms are a major group of microalgae in marine and freshwater environments. To utilize the light energy in blue to green region, diatoms possess unique antenna pigment-protein complexes, fucoxanthin chlorophyll a/c-binding proteins (FCPs). Depending on light qualities and quantities, diatoms form FCPs with different energies: normal-type and red-shifted FCPs. In the present study, we examined changes in light-harvesting and energy-transfer processes of a diatom Chaetoceros gracilis cells grown using white- and single-colored light-emitting diodes (LEDs), by means of time-resolved fluorescence spectroscopy. The blue LED, which is harvested by FCPs, modified energy transfer involving CP47, and suppressed energy transfer to PSI. Under the red-LED conditions, which is absorbed by both FCPs and PSs, energy transfer to PSI was enhanced, and the red-shifted FCP appeared. The red-shifted FCP was also recognized under the green- and yellow-LEDs, suggesting that lack of the shorter-wavelength light induces the red-shifted FCP. Functions of the red-shifted FCPs are discussed.
- Link information
- ID information
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- DOI : 10.1007/s11120-020-00713-2
- ISSN : 0166-8595
- eISSN : 1573-5079
- Pubmed ID : 31970552
- Web of Science ID : WOS:000508704400001