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In Broadleaved Evergreens Variations in Fv/Fm Induced by Photoinhibition are Coupled to Reductions in PSII RC Unit Size

  • Guido Bongi
  • Francesco Loreto
Part of the NATO ASI Series book series (NSSA, volume 168)

Abstract

Different sources of stress, when coupled to high light fluence, produce photoinhibitive damage on broadleaved evergreens at irradiations which are 4–5 times higher than reported on annual leaves. Quantum yield of PSII photochemistry Qy(p) as indicated by the ratio Fv/Fm at 692nm (Kitajima and Butler) was found to be quite a convenient probe of photoinhibitive damage; Bjorkman3 on Hedera canariensis, and same other authors on different species found highly signifiant relationship between quantum yield for oxygen evolution, Qy(ox) and Qy (p). The same procedure when applied to our plants resulted however in a trend lowered by a constant factor in respect to those experiences (fig.1).

Keywords

Quantum Yield Nitrogen Starvation PSII Photochemistry Primary Photochemistry Annual Leaf 
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).
    S.P. Long, A. Nugawela, G. Bongi, and P.K. Farage. Chilling dependent photoinhibition of photosynthetic C02 uptake, in Progress in Photosynt. Res. vol IV, J. Biggins ed., M. Nijhoff Publ. Dordrecht (1987).Google Scholar
  2. 2).
    M. Kitajima and W.L. Butler. Quenching of chlorophyll fluorescence and primary photochemistry in chloroplasts by dibromothymoquinone. Bioch.Biophys.Acta 376: 105–115 (1975).CrossRefGoogle Scholar
  3. 3).
    O. Bjorkman. High irradiance stress in higher plants and interaction with other stress factors, in Progress in Photosynt. Res. vol IV, J. Biggins ed. M. Nijhoff Publ. Dordrecht (1987).Google Scholar
  4. 4).
    B. Demming and O. Björkman. Comparison of the effect of excessive light on chlorophyll fluorescence (77K) and photon yield of O2 evolution in leaves of higher plants. Planta 171: 171–184 (1987).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • Guido Bongi
    • 1
  • Francesco Loreto
    • 1
  1. 1.C.N.R. OlivicolturaPerugiaItaly

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