クロロフィル蛍光画像計測法によるハイゴケ (Hypnum plumaeforme) の光合成機能解析

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Moss plants have been generated much attention as a new greening material in recent years because of their lightweight, ease of maintenance, high tolerance to environmental stresses and high transpiration ability. In order to produce moss plant for greening efficiently, the growing conditions should be controlled to achieve its optimum growth. For the optimum growth, the optimal conditions for photosynthesis must be achieved, hence establishment of the appropriate method to assess the photosynthetic functions of moss plants have been required. In this study, we analyzed the photosynthetic functions of Hypnum plumaeforme Wilson by measuring photosynthetic light response curve using self-developed gas exchange system and capturing chlorophyll fluorescence parameter images using self-produced chlorophyll fluorescence imaging system. As a result, low light compensation point and low respiration rate were observed in the photosynthetic light response curve. The result showed that the characteristics of gas exchange of the Hypnum plumaeforme were acclimated to the low light condition under the plant canopy. Furthermore, heterogeneous distribution of photosynthetic abilities was observed in the chlorophyll fluorescence parameter images. At the tip sites of the individual moss bodies, the activities of photosynthetic electron transport and heat dissipation of excessive light energy were lower than the other sites. These results suggested that the tip sites of Hypnum plumaeforme are relatively less tolerant to high light stress.
2007-01-31

クロロフィル蛍光画像計測法によるハイゴケ (Hypnum plumaeforme) の光合成機能解析

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