Abstract
The objective of this study was to develop a practical diagnosis method of indoor trees based on laser induced chlorophyll fluorescence. We have suggested that two parameters, MM-gradient and MM-distance, could be used to analyze induction kinetics curve. Induction kinetics data of trees with low-irradiance stress, water stress, long-darkness-stress and short-darkness-stress were used for analyses by the two parameters, and a criterion based on the two parameters for judging whether the tree was stressed or not, was derived. Though the judgment using the criterion we found was not perfectly correct, it reflected the stress imposed on trees with a high probability and can be used in practical situations.
