Abstract
Aster tripolium and Spergularia maritima were cultivated at 340 ppm CO2 (Ambient) and 580 ppm CO2 (Elevated); salinity of the culture medium was varied at 10 mM NaCl and 250 mM NaCl. Culture solutions were flushed either with oxygen or nitrogen gas. In both species the mean relative growth rate was increased at elevated CO2, but in the present paper there was no significant interaction with the salinity treatment.
Flushing of the nutrient solution with nitrogen reduced the mean relative growth rate of both species under all conditions tested. Increased salinity reduced the mean relative growth rate of both species under all conditions tested. The rate of photosynthesis was increased with enriched CO2 in Spergularia maritima and to a lesser extent in Aster tripolium.
Transpiration rates of both species decreased with CO2 enrichment. The total water potential of the shoot (ΨT) was less negative at elevated CO2. As a result of an increased photosynthetical rate and decreased stomatal conductance the water use efficiency was significantly increased in Spergularia maritima and less pronounced so in Aster tripolium.
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Rozema, J., Lenssen, G.M., Broekman, R.A., Arp, W.P. (1990). Effects of Atmospheric Carbon Dioxide Enrichment on Salt-Marsh Plants. In: Beukema, J.J., Wolff, W.J., Brouns, J.J.W.M. (eds) Expected Effects of Climatic Change on Marine Coastal Ecosystems. Developments in Hydrobiology, vol 57. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2003-3_7
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DOI: https://doi.org/10.1007/978-94-009-2003-3_7
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