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Biosci Biotechnol Biochem. 2003 Jul;67(7):1597-600.

New plant growth promoters, repraesentins A, B and C, from Lactarius repraesentaneus.

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  • 1Department of Bioscience and Biotechnology, Faculty of Agriculture, Shinshu University, Kami-ina, Nagano, Japan.


Three new plant growth regulatory sesquiterpenoids were isolated from the Lactarius repraesentaneus fungus. Their structures were elucidated to be a protoilludene sesquiterpene, namely repraesentin A (1), and two related sesquiterpenes, namely repraesentins B (2) and C (3). Compounds 1-3 showed promotion activities toward the radicle elongation of lettuce seedlings by 136%, 118% and 184% at 67 ppm, respectively.

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