2017年6月
Photoprotection and recovery of photosystem II in the Southern Ocean phytoplankton
POLAR SCIENCE
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- 巻
- 12
- 号
- 開始ページ
- 5
- 終了ページ
- 11
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.polar.2016.12.003
- 出版者・発行元
- ELSEVIER SCIENCE BV
The future shoaling of surface mixed layer depth due to global warming will expose natural assemblages of phytoplankton to increased mean light. Under these conditions, photoprotective acclimation against high light can determine ecological success. We investigated photoprotective responses to sunlight and recovery from photodamage of photosystem II (PSII) in natural assemblages north and south of the Polar Front (PF). The decrease in the maximum quantum yield (F-v/F-m) of PSII during direct sunlight exposure for 2 h was moderated progressively by the enhancement of diatoxanthin synthesis. When the light exposed cells were incubated under three reduced light conditions, F-v/F-m recovered to more than the initial values north of the PF but did not reach initial values south of the PF. Temperatures higher in the north than the south of the PF could have induced the faster recovery from photodamage of PSII in assemblages north of the PF. These northern assemblages may be able to acclimate to fast-changing light conditions. (C) 2016 Elsevier B.V. and NIPR. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.polar.2016.12.003
- ISSN : 1873-9652
- eISSN : 1876-4428
- Web of Science ID : WOS:000402350800002