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KMID : 0903619990400050627
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Journal of the Korean Society for Horticultural Science
1999 Volume.40 No. 5 p.627 ~ p.630
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Photosynthetic Characteristics and Chlorophyll Content of Hedera canariensis , Pachira aquatica , and Ficus benjamina in Response to Photosynthetic Photon Fluxes and CO2 Concentrations
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최종인/Choi, Jong In
백기엽/한은주/Paek, Kee Yoeup/Han, Eun Joo
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Abstract
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Hedera canariensis, Pachira aquatics, and Ficus benjamina were grown in growth chambers where photosynthetic photon flux (PPF) and CO₂ gas were supplied to observe photosynthetic characteristics of the foliage plants under various PPFs and CO₂ concentrations. H. canariensis under PPFs of 100 and 300 μ㏖·m^(-2)·s^(-1) resulted in higher CO₂ assimilation rate as compared to a PPF of 35 μ㏖·m^(-2)·s^(-1) but CO₂ assimilation rate and transpiration rate decreased under the combination of a high CO₂ concentration (1500μ㏖·㏖^(-1)) and high PPFs (100 and 300 μ㏖·m^(-2)·s^(-1)). In P. aquatics, CO₂ assimilation rate reached highest at a 100 μ㏖·m^(-2)·s^(-1) PPF and a 1000 μ㏖·㏖^(-1) CO₂ concentration. Under a PPF of 35 μ㏖·m^(-2)·s^(-1), increasing CO₂ concentration leaded to increased stomatal conductance and transpiration rate. CO₂ assimilation rate of F. benjamina was significantly higher at a 100 μ㏖·m^(-2)·s^(-1) PPF as compared to PPFs of 35 and 300 μ㏖·m^(-2)·s^(-1) regardless of CO₂ concentration. PPF affected chlorophyll contents of the plants, showing highest content under a 35 μ㏖·m^(-2)·s^(-1) PPF at all CO₂ concentrations. These results indicated that PPF and CO₂ can be manipulated to optimize growth of three foliage plants.
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KEYWORD
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