Growth potential of Lemna gibba: Effect of CO2 enrichment at high photon flux rate |
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Authors: | Gunnar Björndahl Stein Nilsen |
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Institution: | The Phytotron, University of Oslo, P.O. Box 1066, Blindern, Oslo 3 Norway |
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Abstract: | Lemna gibba L. was cultivated in continuous light (800–1200 μmol quanta m?2s?1, 320–400 W m?2) and normal or CO2-enriched air (1500 μl CO2 l?1), with a continuous nutrient supply. Increased CO2 concentration increased the unit leaf rate (ULR) or net assimilation rate and decreased the leaf area ratio (LAR) (photosynthetic area per unit dry weight), but the relative growth rate was unchanged (0.43 g g?1 day?1). The changes in ULR and LAR indicate that organic matter production can be increased with CO2 enrichment at high photon flux rate (PFR). |
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