Photosynthetica 1999, 36(1):41 | DOI: 10.1023/A:1007010502269

Seasonal Patterns of Photosystem 2 Photochemical Efficiency in Evergreen Sclerophylls and Drought Semi-Deciduous Shrubs under Mediterranean Field Conditions

S. Karavatas1, Y. Manetas1
1 Laboratory of Plant Physiology, Department of Biology, University of Patras, Patras, Greece

Photochemical efficiency of photosystem 2 (PS2), assessed from in situ chlorophyll (Chl) fluorescence measurements, was seasonally monitored in five evergreen sclerophyll and five malacophyllous drought semi-deciduous species, co-occurring in the same Mediterranean field site. In evergreen sclerophylls, a considerable drop in the variable (Fv) to maximum (Fm) Chl fluorescence ratio coincided with the lowest winter temperatures, indicating low PS2 efficiency during this period. Summer drought caused a comparatively slight decrease in Fv/Fm and only in three of the five evergreen sclerophyll species tested. In drought semi-deciduous shrubs, the winter drop in Fv/Fm was much less conspicuous. During the summer, and in spite of the severe and prolonged desiccation of their malacophyllous leaves, Fv/Fm was maintained high and only in one species the PS2 efficiency was transiently suppressed, when the leaf relative water content became lower than 30 %. Thus evergreen sclerophylls are more prone to photoinhibition by low winter temperatures, while the sensitivity of drought semi-deciduals depends on the extent and duration of summer drought.

Additional key words: Arbutus; chlorophyll fluorescence kinetics; Cistus; Genista; Nerium; Phillyrea; Phlomis; Pistacia; relative water content; Sarcopoterium

Published: June 1, 1999  Show citation

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Karavatas, S., & Manetas, Y. (1999). Seasonal Patterns of Photosystem 2 Photochemical Efficiency in Evergreen Sclerophylls and Drought Semi-Deciduous Shrubs under Mediterranean Field Conditions. Photosynthetica, 36(1-2), 41. doi: 10.1023/A:1007010502269
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    References

    1. Adams, W.W., III, Demmig-Adams, B.: Carotenoid composition and down regulation of photosystem II in three conifer species during the winter.-Physiol. Plant. 92: 451-458, 1994. Go to original source...
    2. Adams, W.W., III, Demmig-Adams, B., Verhoeven, A.S., Barker, D.H.: "Photoinhibition" during winter stress: involvement of sustained xanthophyll cycle-dependent energy dissipation.-Aust. J. Plant Physiol. 22: 261-276, 1995. Go to original source...
    3. Adams, W.W., III, Demmig-Adams, B., Winter, K., Schreiber, U.: The ratio of variable to maximum chlorophyll fluorescence from photosystem II, measured in leaves at ambient temperature and at 77 K, as an indicator of the photon yield of photosynthesis.-Planta 180: 166-174, 1990. Go to original source...
    4. Beyschlag, W., Lange, O.L., Tenhunen, J.D.: Photosynthese und Wasserhaushalt der immergrünen Mediterranen Hartlaubpflanze Arbutus unedo L. im Jahresverlauf am Freilandstandort in Portugal. I. Tagesläufe von CO2-Gaswechsel und Transpiration unter natürlichen Bedingungen.-Flora 178: 409-444, 1986. Go to original source...
    5. Beyschlag, W., Lange, O.L., Tenhunen, J.D.: Photosynthese und Wasserhaushalt der immergrünen Mediterranen Hartlaubpflanze Arbutus unedo L. im Jahresverlauf am Freilandstandort in Portugal. III. Einzelfaktorenanalyse zur Licht-, Temperature-und CO2-Abhängigkeit der Nettophotosynthese.-Flora 184: 271-289, 1990. Go to original source...
    6. Björkman, O., Powles, S.B.: Inhibition of photosynthetic reactions under water stress: interaction with light level.-Planta 161: 490-504, 1984. Go to original source...
    7. Butler, W.L., Kitajima, M.: Fluorescence quenching in photosystem II of chloroplasts.-Biochim. biophys. Acta 376: 116-125, 1975. Go to original source...
    8. Demmig-Adams, B., Adams, W.W., III: Photoprotection and other responses of plants to high light stress.-Annu. Rev. Plant Physiol. Plant mol. Biol. 43: 599-626, 1992. Go to original source...
    9. Demmig-Adams, B., Adams, W.W., III, Winter, K., Meyer, A., Schreiber, U., Pereira, J.S., Kruger, A., Czygan, F.-C., Lange, O.L.: Photochemical efficiency of photosystem II, photon yield of O2 evolution, photosynthetic capacity, and carotenoid composition during the midday depression of net CO2 uptake in Arbutus unedo growing in Portugal.-Planta 177: 377-387, 1989. Go to original source...
    10. Eckardt, F.E., Heim, G., Methy, M., Sauvezon, R.: Interception de l'énergie rayonnante, échanges gazeux et croissance dans une fôret méditerrannéenne à feuillage persistant (Quercetum ilicis).-Photosynthetica 9: 145-156, 1975.
    11. Garcia-Plazaola, J.I., Faria, T., Abadia, D., Chaves, M.M., Pereira, J.S.: Seasonal changes in xanthophyll composition and photosynthesis of cork oak (Quercus suber L.) leaves under mediterranean climate.-J. exp. Bot. 48: 1667-1674, 1997. Go to original source...
    12. Grammatikopoulos, G., Kyparissis, A., Manetas, Y.: Seasonal and diurnal gas exchange characteristics and water relations of the drought semi-deciduous shrub Phlomis fruticosa L. under Mediterranean field conditions.-Flora 190: 71-78, 1995. Go to original source...
    13. Gratani, L.: Canopy structure, vertical radiation profile and photosynthetic function in a Quercus ilex evergreen forest.-Photosynthetica 33: 139-149, 1997. Go to original source...
    14. Harley, P.C., Tenhunen, J.D., Beyschlag, W., Lange, O.L.: Seasonal changes in net photosynthesis rates and photosynthetic capacity in leaves of Cistus salvifolius, a European Mediterranean semi-deciduous shrub.-Oecologia 74: 380-388, 1987. Go to original source...
    15. Kyparissis, A., Manetas, Y.: Autumn revival of summer leaves in the seasonal dimorphic, drought semi-deciduous Mediterranean shrub Phlomis fruticosa L.-Acta oecol. 14: 725-737, 1993.
    16. Lange, O.L.: Ecophysiology of photosynthesis: performance of poikilohydric lichens and homoiohydric Mediterranean sclerophylls.-J. Ecol. 76: 915-937, 1988. Go to original source...
    17. Larcher, W.: Jahresgang des Assimilations-und Respirationsvermögens von Olea europaea L. ssp. sativa Hoff. et Link., Quercus ilex L. and Quercus pubescens Willd. aus dem nordlichen Gardaseegebiet.-Planta 56: 575-606, 1961. Go to original source...
    18. Larcher, W.: Low temperature effects on Mediterranean sclerophylls: an unconventional viewpoint.-In: Margaris, N.S., Mooney, H.A. (ed.): Components of Productivity of Mediterranean-Climate Regions. Basic and Applied Aspects. Pp. 259-265. Dr W. Junk Publ., The Hague-Boston-London 1981. Go to original source...
    19. Larcher, W.: Physiological Plant Ecology. 3rd Ed.-Springer-Verlag, Berlin 1995. Go to original source...
    20. Leverenz, J.W., Oquist, G.: Quantum yields of photosynthesis at temperatures between -2°C and 35°C in a cold-tolerant C3 plant (Pinus sylvestris) during the course of one year.-Plant Cell Environ. 10: 287-295, 1987. Go to original source...
    21. Long, S.P., Humphries, S., Falkowski, P.G.: Photoinhibition of photosynthesis in nature.-Annu. Rev. Plant Physiol. Plant mol. Biol. 45: 633-662, 1994. Go to original source...
    22. Mitrakos, K.: A theory for Mediterranean plant life.-Acta oecol. 1: 245-252, 1980.
    23. Mohammed, G.H., Binder, W.D., Gillies, S.L.: Chlorophyll fluorescence: A review of its practical forestry applications and instrumentation.-Scand. J. Forest Res. 10: 383-410, 1995. Go to original source...
    24. Mooney, H.A.: The impact of environmental stress on plant performance in Mediterranean climate ecosystems.-In: Tenhunen, J.D., Catarino, F.M., Lange, O.L., Oechel, W.C. (ed.): Plant Response to Stress. Functional Analysis in Mediterranean Ecosystems. Pp. 661-668. Springer-Verlag, Berlin 1987. Go to original source...
    25. Ögren, E., Sjöström, M.: Estimation of the effect of photoinhibition on the carbon gain in leaves of a willow canopy.-Planta 181: 560-567, 1990. Go to original source...
    26. Orshan, G., Floret, C., Le Floch, E., Le Roux, A., Montenegro, G., Romane, F.: General synthesis.-In: Orshan, G. (ed.): Plant Phenomorphological Studies in Mediterranean Type Ecosystems. Pp. 389-399. Kluwer Academic Publishers, Dordrecht 1989. Go to original source...
    27. Turner, N.C.: Techniques and experimental approaches for the measurement of plant water status.-Plant Soil 58: 339-366, 1981. Go to original source...
    28. Young, A.J.: The photoprotective role of carotenoids in higher plants.-Physiol. Plant. 83: 702-708, 1991. Go to original source...

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