Polar Biology

, Volume 10, Issue 5, pp 337–341 | Cite as

Morphology and photosynthetic physiology of Grimmia antarctici from wet and dry habitats

  • M. E. Wilson
Article

Summary

Photosynthetic capacity, chlorophyll content and leaf and cell morphology were compared in Grimmia antarctici from wet and dry sites in the Bailey Peninsula SSSI, near Casey Station, East Antarctica. In wet sites G. antarctici grew as a turf with tall shoots of loosely packed long leaves: in very dry sites it formed small cushions with short shoots of small tightly packed leaves. Intermediate forms (large cushions) were also frequently observed in less extreme situations. Cell size and number were greater in drier sites. The chlorophyll content, chlorophyll a/b ratio and the light saturated photosynthetic and dark respiration rates at full turgor and under enhanced conditions of CO2 were the same. This rules out a direct effect of water stress on the integrity of the photosynthetic apparatus and implies that the cushion form is a product of direct effects of water availability on cell division and differentiation and CO2 assimilation under field conditions.

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References

  1. Adamson H, Wilson M, Selkirk P, Seppelt R (1988) Photoinhibition in Antarctic mosses. Polarforschung 58:103–111Google Scholar
  2. Anderson JM, Boardman NK (1964) Studies on the greening of dark-grown bean plants. Aust J Biol Sci 17:93–101Google Scholar
  3. Brouers M, Michel-Wolwertz M-R (1983) Estimation of protochlorophyll(ide) contents in plant extracts; re-evaluation of the molar absorption coefficient of protochlorophyll(ide). Photosynth Res 4:265–270Google Scholar
  4. Henry LK (1929) The effect of environment on mosses. Bryologist 32:84–87Google Scholar
  5. Kaiser WM (1987) Effects of water deficit on photosynthetic capacity. Physiol Plant 71:142–149Google Scholar
  6. Kallio P, Karenlampi L (1975) Photosynthesis in mosses and lichens. In: Cooper JP (ed) Photosynthesis and productivity in different environments. International Biological Programme 3. Cambridge University Press, Cambridge London New York Melbourne, pp 393–423Google Scholar
  7. Kappen L, Lewis Smith RI, Meyer M (1989) Carbon dioxide exchange of two ecodemes of Schistidium antarctici in continental Antarctica. Polar Biol 9:415–422Google Scholar
  8. Lewis Smith RI (1986) Report on Antarctic fieldwork. Plant ecological studies in the fellfield ecosystem near Casey Station, Australian Antarctic Territory, 1985–86. BAS Bull 72:81–91Google Scholar
  9. Martin CE (1980) Chlorophyll a/b ratios of eleven North Carolina mosses. Bryologist 83:84–87Google Scholar
  10. Proctor MFC (1984) Structure and ecological adaptation. In: Dyer AF, Duckett JG (eds) The experimental biology of bryophytes. Academic Press, London, pp 9–37Google Scholar
  11. Reid DM, Wample RL (1985) Water relations and plant hormones. In: Pharis RP, Reid DM (eds) Hormonal regulation of development, III. Role of environmental factors. Encyclopedia of plant physiology, new ser, vol 11. Springer, Berlin Heidelberg New York Toronto, pp 513–578Google Scholar
  12. Schofield WB (1981) Ecological significance of morphological characters in the moss gametophyte. Proc. IAB/ABLS Symp Biol Signif Morphol Characters in Bryophytes. Bryologist 84:149–165Google Scholar
  13. Selkirk PM, Seppelt RD (1987) Species distribution within a moss bed in greater Antarctica. Symp Biol Hung 35:279–284Google Scholar
  14. Shimuzu H, Takeuchi Y, Sataki K, Totsuka T (1984) Growth and photosynthesis of a moss Plagiomnium maxinoviczii. I. Effects of light intensity. J Hatt Bot Lab 56:159–166Google Scholar
  15. Valanne N (1984) Photosynthesis and photosynthetic products in mosses. In: Dyer AF, Duckett JG (eds) The experimental biology of bryophytes. Academic Press, London, pp 257–273Google Scholar
  16. Yegappan TM, Paton DM, Gates CT, Muller WJ (1982) Water stress in sunflower (Helianthus annuus L.). 2. Effects on leaf cells and leaf area. Ann Bot 49:63–68Google Scholar

Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • M. E. Wilson
    • 1
  1. 1.School of Biological SciencesMacquarie UniversityAustralia

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