Bioelectric potential and purification capability of pothos under LED lights

It has been performing to use effective plant functions in order to reduce polluting substances and increase yields of foods. The plant functions have been making a significant contribution to the human society until now. In this paper, the plant bioelectric potential was examined to introduce the effective functions in real time. Namely, the potential characteristics as a function of irradiation light frequency were examined under an existence of air pollutant. Pothos was adopted as a subjective plant. The purification capabilities of the plant for gaseous ethyl alcohol and formaldehyde were investigated and the potential characteristics were measured. Several kinds of irradiation-light frequencies were used. As the result, it became obvious that the purification capability became larger as the frequency became lager and when the mixed light was irradiated to the subject. Especially, it takes the highest value under white daylight which includes various light frequencies. The capability becomes smaller and the fluctuating range of the potential in the air polluting chemicals also becomes smaller under darkness and green light. The range becomes larger under white daylight. It becomes obvious that the bioelectric potential becomes smaller under darkness compared with the one in the light irradiating condition. This result is confirmed regardless of the presence or absence of air polluting chemical. It is thought that a plant could have a sensing function according to investigate the plant bioelectric potential in detail.