title: 16-O-Demethyl Fusicoccin J and Its 3-Epimer from Fusicoccum amygdali, and Their Seed Germination-stimulating Activity in the Presence of Abscisic Acid.
abstract: Our search for new metabolites biosynthetically related to fusicoccin with potent plant growth-stimulating activity from the culture filtrate of Fusicoccum amygdali F6 resulted in the isolation of a new derivative of fusicoccin J, as well as fusicoccin J and 16-O-demethyl 3-epifusicoccin J. Its structure was analyzed by 600 MHz NMR spectrometry and identified as 16-O-demethyl fusicoccin J. The biosynthetic relationships among 16-O-demethyl fusicoccin J and its 3-epimer, and fusicoccin J are discussed in connection with the co-occurrence of both of the 3-epimers of 16-O-demethyl fusicoccin J. 16-O-Demethyl fusicoccin J and its 3-epimer showed only low germination-stimulating activity toward lettuce seeds in the presence of abscisic acid (20 μM), the latter being slightly more active than the former.
authors.affiliation: a Department of Bioresources, Faculty of Agriculture, Yamagata University.
authors.forename: T
authors.initials: T
authors.lastname: Sassa
authors.affiliation: b Institute of Advanced Material Study, Kyushu University.
authors.forename: C S
authors.initials: CS
authors.lastname: Zhang
authors.affiliation: a Department of Bioresources, Faculty of Agriculture, Yamagata University.
authors.forename: N
authors.initials: N
authors.lastname: Tajima
authors.affiliation: b Institute of Advanced Material Study, Kyushu University.
authors.forename: N
authors.initials: N
authors.lastname: Kato
keywords: 16-O-demethyl 3-epifusicoccin J; 16-O-demethyl fusicoccin J; Fusicoccum amygdali; abscisic acid; seed germination