Abstract
Photosynthetic gas exchange properties of leaves of the mangrove, Rhizophora stylosa Griff., were investigated in order to assess its productivity and gain some insight into the constraints set upon it by the saline habitat. Mature trees of this dominant species were studied in their natural, tidal-forest environment at Hinchinbrook Is., North Queensland for two periods during the dry season. Individual leaves were enclosed in a chamber wherein environmental conditions were varied. CO2 assimilation, transpiration and environmental parameters were monitored during daylight hours by instrumentation housed in a mobile laboratory mounted on a barge. Analysis of the daily course of leaf gas exchange revealed a CO2 assimilation capacity comparable with that of many glycophytic trees. Photosynthesis was strongly influenced by leaf temperature as well as photon flux density. There was a strong and steadily increasing inhibition of gas exchange as leaf temperatures and, consequently, the leaf to air VPD increased. CO2 assimilation rates and leaf conductances to water vapour diffusion were strongly correlated, resulting in nearly constant internal CO2 concentrations in the leaves under the full range of conditions. The effect of leaf orientation in minimizing the leaf-to-air temperature difference was striking. The close coordination between stomatal conductance and CO2 assimilation rate in this mangrove results in high water use efficiency. This sparing use of water may be an important factor underlying the high salinity tolerance of mangroves.
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Andrews TJ, Clough BF, Muller GJ (1984) Photosynthetic gas exchange and carbon isotope ratios of some mangroves in North Queensland. In: Teas HJ (ed) Physiology and Management of Mangroves. Tasks for Vegetation Science. Vol. 9 Junk, The Hague
Attiwill PM, Clough BF (1980) Carbon dioxide and water vapour exchange in the white mangrove Photosynthetica 14:40–47
Ball MC, Critchley C (1982) Photosynthetic responses to irradiance by the grey mangrove, Avicennia marina, grown under different light regimes. Plant Physiol 70:1101–1106
Bato KG, Wellington JT (1983) Phosphorus and nitrogen nutritional status of a northern Australian mangrove forest. Mar Ecol Prog Ser 11:63–69
Chapman VJ (1976) Mangrove vegetation. J Cramer, Vaduz
Clough BF (ed) (1982) Mangrove ecosystems in Australia. Structure, Function and Management. ANU Press, Canberra
Clough BF, Andrews TJ, Cowan IR (1982) Physiological processes in mangroves. In: Clough BF (ed) Mangrove Ecosystems in Australia. Structure, Function and Management. ANU Press, Canberra, pp 193–210
Fischer RA, Turner NC (1978) Plant productivity in arid and semiarid zones. Annu Rev Plant Physiol 29:277–317
Golley F, Odum HT, Wilson RF (1962) The structure and metabolism of a Puerto Rican red mangrove forest in May. Ecology 43:9–19
Hall AE, Schulze E-D, Lange OL (1976) Current perspectives of steadystate stomatal responses to environment. In: Lange OL, Kappen L, Schulze E-D (eds) Ecological Studies. Analysis and Synthesis, Vol. 19. Water and plant Life. Springer, Berlin, Heidelberg, New York, pp 169–188
Kaufmann MR (1982) Leaf conductance as a function of photosynthetic photon flux density and absolute humidity difference from leaf to air. Plant Physiol 69:1018–1022
Larcher W (1975) Physiological plant ecology. Springer-Verlag Berlin, Heidelberg, New York
Lösch R, Tenhunen JD (1981) Stomatal responses to humidityphenomenon] and mechanism: 137–161. In: Jarvis PG, Mansfield TA (eds) Stomatal Physiology. Cambridge University Press: New York
Ludlow MM, Wilson GL (1971) Photosynthesis of tropical pasture plants. I. Illuminance, carbon dioxide concentration, leaf temperature and leaf-air vapour pressure difference. Aust J Biol Sci 24:449–470
Lugo AE, Snedaker SC (1974) The ecology of mangroves. Annu Rev Ecol Syst 5:39–64
Macnae W (1968) A general account of the fauna and flora of mangrove swamps and forests in the Indo-West-Pacific region. Adv Mar Biol 6:73–270
Moore RT, Miller PC, Albright D, Tieszen LL (1972) Comparative gas exchange characteristics of three mangrove species in winter. Photosynthetica 6:387–393
Moore RT, Miller PC, Ehleringer J, Lawrence W (1973) Seasonal trends in gas exchange characteristics of three mangrove species. Photosynthetica 7:387–394
Rawson HM, Begg JE, Woodward RG (1977) The effect of atmospheric humidity on photosynthesis, transpiration and water use efficiency of leaves of several plant species. Planta 134:5–10
Schaedle M (1975) Tree photosynthesis. Annu Rev Plant Physiol 26:101–115
Selinger B (1978) Chemistry in the Market Place. ANU Press
Wong SC, Cowan IR, Farquhar GD (1979) Stomatal conductance correlates with photosynthetic capacity. Nature 282:424–426
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Contribution No. 254 from the Australian Institute of Marine Science
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Andrews, T.J., Muller, G.J. Photosynthetic gas exchange of the mangrove, Rhizophora stylosa Griff., in its natural environment. Oecologia 65, 449–455 (1985). https://doi.org/10.1007/BF00378922
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DOI: https://doi.org/10.1007/BF00378922