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Novel Potato Micro-Tuber-Inducing Compound, (3R,6S)-6-Hydroxylasiodiplodin, from a Strain of Lasiodiplodia theobromae

A novel potato micro-tuber-inducing compound was isolated from the culture broth of Lasiodiplodia theobromae Shimokita 2. The structure of the isolated compound was determined as (3R,6S)-6-hydroxylasiodiplodin by means of spectroscopic analyses, the modified Mosher method, and chemical conversion. The compound showed potato micro-tuber-inducing activity at a concentration of 10−4 M, using the culture of single-node segments of potato stems in vitro.