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Published on: October 4, 2019
Phytotoxic sesterterpene, 11-epiterpestacin, from Bipolaris sorokiniana NSDR-011
Yoichiro Nihashi1, Chi-Hwan Lim, Chihiro Tanaka
1Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Japan.
Abstract:
The structure of siccanol, a phytotoxic sesterterpene of fungal origin, was analyzed after chemical conversion by NMR spectroscopy. Siccanol was found to be an epimer of terpestacin that has been isolated from Arthrinium sp., and was thus renamed 11-epiterpestacin. Its stereochemistry was also identical with that of fusaproliferin, a structurally related mycotoxin from Fusarium proliferatum. Therefore, this sesterterpene may also be referred to as 24-deacetyl fusaproliferin. The phytotoxicity of 11-epiterpestacin was almost equal to that of terpestacin, but significantly higher than that of fusaproliferin.
