Formaldehyde Gas Removal Effects and Physiological Responses of Fatsia japonica and Epipremnum aureum according to Various Light Intensity
2008
Kil, M.J. (National Horticultural Research Institute, RDA, Suwon, Republic of Korea) | Kim, K.J. (National Horticultural Research Institute, RDA, Suwon, Republic of Korea), E-mail: [email protected] | Cho, J.K. (National Horticultural Research Institute, RDA, Suwon, Republic of Korea) | Park, C.H. (Korea University, Seoul, Republic of Korea)
The amount of formaldehyde removal was assessed according to various light intensity, and correlations between formaldehyde removal and photosynthesis factors were determined by potted Fatsia japonica and Epipremnum aureum. The amount of formaldehyde removal by potted F. japonica and E. aureum did not significantly increase with light intensity, whereas it had considerable differences between the light and the dark (0 μmolㆍm-²ㆍs-¹). The amount of formaldehyde removal by F. japonica and E. aureum was positively correlated with photosynthesis rate, but negatively correlated with intercellular CO₂ at 2 and 5 h after exposure. In addition, photosynthesis rate tended to decrease with time at high light intensity, which was attributable to the reduction of CO₂ concentration in a chamber. Stomatal conductance and transpiration rate increased with light intensity during exposure of gaseous formaldehyde in a chamber, whereas intercellular CO₂ decreased. As a result, we considered that formaldehyde removal by potted plants was little affected by indoor light intensity (20-60 μmolㆍm-²ㆍs-¹).
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