Abstract
We report a simple measurement method of the dependence to photosynthetic activity of the light intensity. In the photosynthesis, plants convert light energy into chemical energy and the plants grow itself. In water plants, the pH of water increase by the absorption of carbon dioxide through photosynthetic process, the pH difference of the water reflects a degree of photosynthesis. We have previously reported on a measurement method of photosynthetic activity using an automated pH measurement system consisting of an ion-sensitive field-effect transistor (ISFET) sensor we developed earlier. In this paper, we succeeded to obtain the dependence to photosynthetic activity of the light intensity using Egeria densa by constructing a better measurement method.
