Chlorophyll fluorescence ratio F685/F735 in brown algae and its variation under excitation by two types of light and dehydration

Baogan Wu; Rubo Zang

doi:10.1007/BF02850721

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Chlorophyll fluorescence ratio F685/F735 in brown algae and its variation under excitation by two types of light and dehydration

Updated：2023-05-16

- Chlorophyll fluorescence ratio F685/F735 in brown algae and its variation under excitation by two types of light and dehydration
- Journal of Oceanology and Limnology Vol. 11, Issue 1, Pages: 1-7(1993)
- Affiliations：
  
  1. Institute of Hydrobiology
  2. Institute of Oceanology
- Author bio：
- Funds：
- DOI：10.1007/BF02850721
  CLC：
- Published：1993
- Accepted：
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Baogan, W., Rubo, Z. Chlorophyll fluorescence ratio F685/F735 in brown algae and its variation under excitation by two types of light and dehydration., Chin. J. Ocean. Limnol. 11, 1–7 (1993). https://doi.org/10.1007/BF02850721
DOI：

Baogan, W., Rubo, Z. Chlorophyll fluorescence ratio F685/F735 in brown algae and its variation under excitation by two types of light and dehydration., Chin. J. Ocean. Limnol. 11, 1–7 (1993). https://doi.org/10.1007/BF02850721 DOI：

摘要

Abstract

Calculation and comparative study of the chlorophyll fluorescence ratio F685/F735 in brown alage (Laminaria japonica

Underia pinnatifida andPadina crassa) excited by blue and green light showed that the fluorescence ratios were higher when the algae were excited by blue light (440 nm)

but reduced obviously under green light (540 nm) excitation. The values also reduced under dehydration but could recover during rehydration if the stress was not serious. The variation of the fluorescence ratio under dehydration was mainly because changes in fluorescence emission at 735 nm were always sharper than those at 685 nm. The ratio was sensitive to stress and has potential as a stress indicator in phycological research. Measurement of the fluorescence excitation spectra showed that the only peak at 540 nm changed apparently during dehydration. It meant that the function of the Ch1 a/Fucoxanthin protein complex for energy transfer was easily inhibited by water stress. However

no variation of the ratio was found in green algaUlva pertusa under dehydration. So it seemed to be something special for brown algae. The mechanism of this phenomenon is still unclear but may be related to the photosynthetic pigments and structural characteristics of brown algae.

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references

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Related Institution

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