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As a preliminary study to predict indoor gas exchange through the transpiration of plant, photosynthetic activity of ten kinds of foliage plants introduced after light acclimatization was investigated. Light compensation point and dark respiration rate decreased in most of plants light acclimatized, particularly plants grown under low light intensity (80% shade) showed high photosynthetic rate at 200 μ㏖·m^(-2)·s^(-1) or less. Plants grown under high light intensity (40% shade) showed high photosynthetic rates at 300μ㏖·m^(-2)·s^(-1) or more. Spathiphyllum patinii, Monstera deliciosa, Ficus benjamina, and Syngonium podophyllurn showed relatively high photosynthetic rate under low photon flux density regardless of leaf temperature and shade levels. In case of 50 μ㏖·m^(-2)·s^(-1) of light intensity and 22℃ of leaf temperature, similar to indoor environment, plants grown under 80% shade showed higher photosynthetic rates than those grown under 40% shade except Pachira aquatica. Considering the result, we have concluded that plants should be fully acclimatized by light for indoor gas exchange in the indoor of houses and buildings whose light intensity is 50 μ㏖·m^(-2)·s^(-1) or less. When indoor gardens are made in atrium where higher light intensity (200 μ㏖·m^(-2)·s^(-1)) can be provided than indoors, plants acclimatized inside the green houses (40% shade) were thought to fully function.
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