Open AccessPhytoactive Eremophilanes Produced by the Weed PathogenDrechslera gigantea
Author(s) -
Fumio Sugawara,
Yali F. Hallock,
Greg D. Bunkers,
Doug S. Kenfield,
Gary A. Strobel,
Shigeo Yoshida
Publication year - 1993
Publication title -
bioscience, biotechnology, and biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.509
H-Index - 116
eISSN - 1347-6947
pISSN - 0916-8451
DOI - 10.1271/bbb.57.236
Subject(s) - drechslera , gigantea , weed , fungus , biology , botany , pathogen , microbiology and biotechnology
Phytoactive substances were present in a culture broth of Drechslera gigantea, a pathogenic fungus of several grasses. Twelve eremophilane sesquiterpenes (1, 2, 3, 4, 6, 7, 10, 11, 12, 13, 14, and 15) were isolated and structurally characterized by a combination of single-crystal X-ray diffraction and spectroscopic analyses. Most of these sesquiterpenoids were phytotoxic; however, compounds 1 and 3 caused chlorophyll retention, an activity previously associated with phytohormones.