76. ウキクサ類の花芽誘導物質によるキノコ(タモギタケ)の子実体誘導効果

抄録

The mycelium of Tamogitake (Pleurotus cornucopiae var. citrinopileatus) was inoculated into a bottle containing a medium of glass beads with cellulose and rice bran as a nutrient supplement. Then it was capped and cultured in darkness for seven days. The cap was then removed, and mycelia were exposed to light from daylight fluorescent tubes (about 1000 lux). Fruiting response was obtained under illumination on the second or third day after being transferred to light. However, when the culture was incubated in the medium containing glass beads, cellulose and soybean flour, instead of rice bran, the primordial formation of fruit-bodies was markedly suppressed. The addition of salicylic acid to the medium, however, remarkably promoted the formation of fruit-body in the fungus. The fruit-body was also produced with the addition of derivatives such as acetylsalicylic acid and benzoic acid. However, the addition of nicotinic acid or pipecolic acid to the medium could not induce the fruiting. Sodium copper chlorophyllin and sodium iron chlorophyllin also induced the fruiting of the fungus. Salicylic acid and the derivatives, as well as chlorophyllin, can induce flowering of Lemna paucicostata. These results suggest that common processes are involved in the primordial initiation of fruit-body in fungi and the floral induction of Lemna.