Abstract
A temporally closed-chamber system was developed to measure the photosynthesis and transpiration of whole ornamental plants in an indoor environment. The chamber system employs the closed-chamber method to measure the photosynthesis and transpiration of the experimental plant within the chamber. This is achieved by temporarily halting the ventilation fan. Subsequently, by activating the ventilation fan, the chamber's environment is restored to match the external conditions. Utilizing this chamber, the photosynthetic rate, transpiration rate, and total conductance of five Everfresh (Cojoba arborea var. angustifolia) plants under varying light-intensity conditions were assessed. The results revealed significant variability in the light response of photosynthesis, transpiration, and total conductance among the five ornamental plants, despite their common origin from the same grower. This variation in light responses is likely attributed to differences in growing conditions. The findings imply that specific management guidelines tailored to the light response of photosynthesis and transpiration should be established for each ornamental plant to ensure its well-being in an indoor environment.
