Photo-inhibition of Phytoplankton Photosynthesis as a Function of Exposure Time

DOI PDF Web Site Web Site 2 Citations 11 References

Bibliographic Information

Other Title
  • 植物プランクトン光合成の強光阻害

Description

The photo-inhibition of phytoplankton photosynthesis at higher intensities was examined with a cultured marine diatom, Phaeodactylum tricornutum, and natural samples. The question was to determine whether photo-inhibition results from excretion of photosynthetic products from cell or from an actual decrease in photosynthetic rate.<BR>P. tricornutum culturedat 15 klux showed very little photo-inhibition up to 70 klux, and, in the sample cultured at 1 klux, most marked photo-inhibition was observed in 3 hours experiment. Extracellular release was less than 30% of particulate fixation, and did not show any extremeincrease to supplement photosynthesis depression at higher light intensities. When the photosynthesis was measured during 10 minutes, both samples showed no photo-inhibition. The photosynthesis by low light sample lost the linearity of time-course with prolonged exposure at high light intensity. Observed photo-inhibition, therefore, we explained with the actual decrease in photosynthetic rate. Similar photo-inhibition could be seen in marine phytoplankton samples concentrated by filtration

Journal

Citations (2)*help

See more

References(11)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top