環境ストレス因子がポトスの生体電位に及ぼす効果  [in Japanese] Influence of environmental stress on the bioelectrical potential of Pothos (Epipremnum aureum)  [in Japanese]

The bioelectrical potential of the leaves of a plant, Pothos (Epipremnum aureum ), was monitoredwith a potentiometer to detect environmental changes and air pollution. The bioelectrical potentialwas converted to log-log plots of power spectra of a time scale using the Fast Fourier Transform. Thedeclination of the power spectra of Pothos shifted to the high-frequency side more significantly underthe light irradiation condition than under dark conditions. The shift toward the lower level for thepower of the spectra was also confirmed under a saturated benzene atmosphere. These results areconsistent with those reported by Hasegawa et al. for Shefflera and Boston fern. Various foliage plantsmay be candidates as natural biosensors for many toxic substances.