, Volume 58, Issue 3, pp 314–319 | Cite as

Effects of light regime on the growth, leaf morphology, and water relations of seedlings of two species of tropical trees

  • Ned Fetcher
  • Boyd R. Strain
  • Steven F. Oberbauer
Original Papers


An experiment was conducted with Heliocarpus appendiculatus, a pioneer or large gap species of tropical moist forest in Costa Rica, and Dipteryx panamensis, a small gap species. Seedlings were grown in full sun, partial (80%) shade, and full (98%) shade. After one month of growth they were switched between environments and grown for two more months.

Growth in height of Heliocarpus was greatly affected by irradiance, being increased in response to full shade and decreased in full sun. Height of Dipteryx was unaffected by irradiance level. Survival of Heliocarpus seedlings was only 49% in full shade, whereas Dipteryx had 100% survival. Biomass of Heliocarpus was not significantly greater in full sun than in partial shade whereas it was for Dipteryx. The response of root: shoot ratio was similar for both species. They were lowest in full shade and highest in full sun. Heliocarpus exhibited greater changes in leaf thickness, specific leaf weight, and stomatal density than did Dipteryx. Stomatal conductance of both species was lower in full shade and full sun than in partial shade.

The results of the experiment indicate that growth of Heliocarpus is more plastic than that of Dipteryx in response to changes in irradiance. Previous environment did not affect the response to the present environment in either species. Both species responded positively to increases in irradiance.


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  1. Bazzaz FA (1979) The physiological ecology of plant succession. Ann Rev Ecol Sys 10:351–371CrossRefGoogle Scholar
  2. Bazzaz FA, Carlson RW (1982) Photosynthetic acclimation to variability in the light environment of early and late successional plants. Oecologia 54:313–316Google Scholar
  3. Bazzaz FA, Pickett STA (1980) Physiological ecology of tropical succession: A comparative review. Ann Rev Ecol Sys 11:287–310CrossRefGoogle Scholar
  4. Biggs WW, Edison AR, Eastin JD, Brown KW, Maranville JW, Clegg MD (1971) Photosynthesis light sensor and meter. Ecology 52:125–131Google Scholar
  5. Bourdeau PF, Laverick ML (1958) Tolerance and photosynthetic adaptability to light intensity in white pine, red pine, hemlock, and Ailanthus seedlings. Forest Sci 4:196–207Google Scholar
  6. Grime JP (1966) Shade avoidance and shade tolerance in flowering plants. In: Bainbridge R, Evans GC, Rackman O (eds) Light as an ecological factor, Blackwell, Oxford, p 187–207Google Scholar
  7. Grime JP (1979) Plant strategies and vegetation processes. John Wiley, New YorkGoogle Scholar
  8. Hartshorn GS (1978) Tree falls and tropical forest dynamics. In: Tomlinson PB, Zimmermann MH (eds) Tropical trees as living systems, Cambridge University Press, New York, p 617–638Google Scholar
  9. Hartshorn GS (1980) Neotropical forest dynamics. Biotropica 12 (suppl):23–30Google Scholar
  10. Kanemasu ET, Thurtell GW, Tanner CB (1969) Design, calibration, and field use of a stomatal diffusion porometer. Plant Physiol 44:881–885Google Scholar
  11. Loach K (1967) Shade tolerance in tree seedlings I: Leaf photosynthesis and respiration in plants raised under artificial shade. New Phytol 66:607–621Google Scholar
  12. Loach K (1970) Shade tolerance in tree seedlings II: Growth analysis of plants raised under artificial shade. New Phytol 69:273–286Google Scholar
  13. McNeil DR (1977) Interactive data analysis. John Wiley and Sons, New YorkGoogle Scholar
  14. Mooney HA, Bjorkman O, Hall AE, Medina E, Tomlinson PB (1980) The study of the physiological ecology of tropical plants — Current status and needs. BioScience 30:22–26Google Scholar
  15. Oldeman RAA (1978) Architecture and energy exchange of dicotyledonous trees in the forest. In: Tomlinson PB, Zimmerman MH (eds) Tropical trees as living systems, Cambridge University Press, New York, p 535–560Google Scholar
  16. Parkhurst DF (1978) The adaptive significance of stomatal occurrence on one or both surfaces of leaves. Journal of Ecology 66:367–383Google Scholar
  17. Schulze ED, Lange OL, Evenari M, Kappen L, Buschbom U (1974) The role of air humidity and leaf temperature in controlling stomatal resistance of Prunus armeniaca L. under desert conditions: I. A simulation of the daily course of stomatal resistance. Oecologia 17:159–170Google Scholar
  18. Tukey JW (1977) Exploratory data analysis. Addison-Wesley, Reading, MassachusettsGoogle Scholar
  19. Wallace LL, Dunn EL (1980) Comparative photosynthesis of three gap phase successional tree species. Oecologia 45:331–340Google Scholar
  20. Whitmore TC (1975) Tropical rain forests of the far east. Clarendon Press, OxfordGoogle Scholar
  21. Whitmore TC (1978) Gaps in the forest canopy. In: Tomlinson PB, Zimmerman MH (eds) Tropical trees as living systems, Cambridge University Press, New York, p 639–655Google Scholar
  22. Whitmore TC (1982) On pattern and process in forests. In: Newman EI (ed) The plant community as a working mechanism. Blackwell Scientific Publications, Oxford, p 45–59Google Scholar
  23. Woodward FI, Yaqub M (1979) Integrator and sensors for measuring photosynthetically active radiation and temperature in the field. J Appl Ecol 16:545–552Google Scholar

Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • Ned Fetcher
    • 1
  • Boyd R. Strain
    • 1
  • Steven F. Oberbauer
    • 1
  1. 1.Duke Phytotron, Department of BotanyDuke UniversityDurhamUSA

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