抄録
Sclerin, a colorless crystalline, C13H14O4 compound melting at 123°C was at first isolated as a lipase formation stimulating constituent of Sclerotinia libertiana, from its own mycelial extract, and infrared spectrum showed the presence a hydroxyl group and a lactone ring. Sclerin was found to promote also the enzyme formation and growth of various plant seedlings such as those of castor bean-, mung bean-, and rice seedlings. In the growth of the sclerin-treated plant, promotion of root formation and increase of dry weight per unit shoot length were noticed, and the combined use of sclerin and gibberellin brought about a synergistic effect on the growth of rice seedlings. The relationship between sclerin and some other plant growth regulators in the enzyme formation of germinating seeds was also described.
