Hydroxysulochrin, a tea pollen growth inhibitor from the fungus Aureobasidium sp.

Atsumi Shimada, Chisako Shiokawa, Miyako Kusano, Shozo Fujioka, Yasuo Kimura

Index: Biosci. Biotechnol. Biochem. 67(2) , 442-4, (2003)

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Abstract

A new plant growth regulator, hydroxysulochrin (1), together with sulochrin (2) was isolated from the culture filtrate of Aureobasidium sp. grown on a malt extract medium. The structures of 1 and 2 were established by spectroscopic methods. 1 and 2 inhibited tea pollen tube growth by 41% and 36% of the control value at a concentration of 100 mg/l, respectively. However, 1 and 2 showed no inhibitory effect on the growth of lettuce seedlings from 0.1 mg/l to 100 mg/l.