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KMID : 0903619980390020197
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Journal of the Korean Society for Horticultural Science
1998 Volume.39 No. 2 p.197 ~ p.202
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Photosynthesis and Stomatal Conductance of Eight Foliage Plant Species as Affected by Photosynthetic Photon Flux Density and Temperature
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Abstract
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CO₂ assimilation rate, intercellular CO₂ concentration, stomatal conductance and transpiration rate as affected by photosynthetic photon flux density (PPFD) and temperature were determined for eight folige plants. Chlorophyll contents of most plants tended to increase by the low PPFD (35-100 μ㏖·m^(-2)·s^(-1)) and temperature compared to high PPFD (300 μ㏖·m^(-2)·s^(-1)) and temperature. Seven foliage plants exihibited increased rate of CO₂ assimilation at 25℃ under 100 to 300 μ㏖·m^(-2)·s^(-1) PPFD, but Diffenbachia had a photosynthetic advantage at level of 35 μ㏖·m^(-2)·s^(-1) PPFD. Intercellular CO₂ concentration was increased at 15℃ under 35 μ㏖·m^(-2)·s^(-1) PPFD, but Ficus benjamina attained high level of CO₂ concentration under 300 μ㏖·m^(-2)·s^(-1) PPFD. Hedera helix maintained a consistent level of intercellular CO₂ without regard to temperature and level of PPFD. Stomatal conductance and transpiration rate in experimented plants except Hederct helix increased at 25℃ under level of 35 μ㏖·m^(-2)·s^(-1) PPFD. But Apenlandra, Ficus elastica and F. benjamina showed increased stomatal conductance and transpiration rate under the level of 100 to 300 μ㏖·m^(-2)·s^(-1) PPFD. Experimented foliage plants had no consistent relationship among CO₂ assimilation, intercellular CO₂ concentraion, stomatal conductance and transpiration rate.
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KEYWORD
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