Effects of Light Intensity on the Bio-Electric Potential and the Morphogenetic Properties of Pholiota nameko

Abstract

In this study, the effects of light intensity on the bio-electric potential and the morphogenetic properties of Pholiota nameko have been examined. The experimental results indicated that the bio-electric potential response was in proportion to light intensity from 2 W m ^-2 to 6 W m ^-2 and the effects were retained after irradiation. The morphogenesis consisting of a wide and deep colored pileus was obtained under light intensities where the bio-electric potential response was large. Similar results have been obtained under various farming conditions in previous experiments; it was considered that it is possible to predict to extent the morphogenesis, using the bio-electric potential an index. In addition, the effects have been examined of extremely intense light pulse stimuli from strobe illumination of the order of milli- second duration on the bio-electric potential and the morphogenetic properties. Observations indicated that the bio-electric potential response to the strobe light occurred within several seconds, and it was confirmed that this strobe illumination strongly promoted growth as a result of the increase in the bio-electric potential of the mushrooms.