Photoinhibition in Thylakoids and Intact Chloroplasts of Codium fragile (Suringar) Hariot

  • Andrew H. Cobb
  • Rachel M. Hopkins
  • Michael L. Williams
  • Robert V. Sealey

Abstract

There is a general acceptance in the literature that photosystem II (PSII) is the primary site of photoinhibition and that prolonged exposure to excessive photosynthetic photon flux density (PPFD) results in pigment loss and lipid breakdown due to photooxidation (as reviewed in 1). However, growth of the marine alga C. fragile is adapted to low PPFD (2,3,4) even though its intertidal habitat is regularly exposed to wide extremes of PPFD on both a seasonal and daily basis. Therefore, this alga is especially at risk of photoinhibition and photooxidation at the higher PPFD’s occurring at low tide. Experiments described in this paper illustrate that chloroplasts and thylakoids isolated from this alga photoinhibit at irradiances supra-optimal for photosynthesis (PS). As with other photosynthetic organisms, the primary lesion appears to be associated with PSII and photooxidative damage occurs with prolonged exposure to light.

Keywords

Photosynthetic Photon Flux Density PSII Activity Intertidal Habitat Intact Chloroplast Photooxidative Damage 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Kyle, D.J., Osmond, C.B. and Arntzen, C.J. (1987). Topics in Photosynthesis. Vol.9. Photoinhibition. Elsevier.Google Scholar
  2. 2.
    Ramus, J. (1978). J. Phycol. 14, 352–362.CrossRefGoogle Scholar
  3. 3.
    Benson, E.E. and Cobb, A.H. (1983). New Phytol. 95, 581–594.CrossRefGoogle Scholar
  4. 4.
    Anderson, J.M. (1985). Biochim. Biophys. Acta. 806, 145–153.CrossRefGoogle Scholar
  5. 5.
    Williams, M.L. and Cobb, A.H. (1985). New Phytol. 101, 79–88.CrossRefGoogle Scholar
  6. 6.
    Cobb, A.H. and Rott, J. (1978). New Phytol. 81, 527–541.CrossRefGoogle Scholar
  7. 7.
    Cobb, A.H. (1977). Protoplasma. 92, 137–146.PubMedCrossRefGoogle Scholar
  8. 8.
    Delieu, T. and Walker, D.A. (1972). New Phytol. 71, 201–225.CrossRefGoogle Scholar
  9. 9.
    Hopkins, R.M., Sealey, R.V. and Cobb, A.H. In preparation.Google Scholar
  10. 10.
    Heath, R.L. and Packer, L. (1968). Arch. Biochem. Biophys. 125, 189–198.PubMedCrossRefGoogle Scholar
  11. 11.
    Herron, H.A. and Mauzerall, D. (1972). Plant Physiol. 50, 141–148PubMedCrossRefGoogle Scholar
  12. 12.
    Benson, E.E. (1983). Studies on the structure and function of Codium fragile chloroplasts. Ph.D. Thesis, Trent Polytechnic Nottingham.Google Scholar
  13. 13.
    Sealey, R.V., Williams, M.L. and Cobb, A.H. (1989). (This volume).Google Scholar

Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Andrew H. Cobb
    • 1
  • Rachel M. Hopkins
    • 2
  • Michael L. Williams
    • 3
  • Robert V. Sealey
    • 1
  1. 1.Department of Life Sciences, Faculty of ScienceNottingham PolytechnicNottinghamUK
  2. 2.Division of Biosphere Sciences, King’s CollegeUniversity of LondonUK
  3. 3.School of Plant BiologyUCNWBangorUK

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