Journal of Plankton Research Vol.25 no.3 pp.317-322, 2003
© Oxford University Press 2003
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Photoprotective response of xanthophyll pigments during phytoplankton blooms in Sagami Bay, Japan
1 Faculty of Engineering, Soka University, 1-236 Tangi-Cho, Hachioji, Tokyo 192-8577 and 2 Faculty of Education and Human Sciences, Yokohama National University, 79-2 Tokiwadai, Hodogaya-Ku, Yokohama 240-8501, Japan
* Corresponding Author: tfujiki{at}ihas.nagoya-u.ac.jp
2 Present Address: Hydrospheric Atmospheric Research Center, Nagoya University, Chikusa-Ku, Nagoya 464-8601, Japan
The relationship between the xanthophyll pool [diadinoxanthin plus diatoxanthin normalized to chlorophyll (Chl) a] and irradiance was examined during phytoplankton blooms in Sagami Bay from the end of April to July 2000. In the case of Chl a concentrations >2 mg m-3, a linear correlation was found between the xanthophyll pool and irradiance of the previous day. On the other hand, for Chl a concentrations <2 mg m-3, the xanthophyll pool remained low and was independent of irradiance of the previous day. The results may indicate that photoprotection by xanthophyll pigments assists the development of phytoplankton blooms under high-irradiance conditions.
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