title: Isolation and identification of alectrol as (+)-orobanchyl acetate, a germination stimulant for root parasitic plants.
abstract: Alectrol, a germination stimulant for root parasitic plants, was purified from root exudates of red clover (Trifolium pratense L.) and identified as a strigolactone, (+)-orobanchyl acetate [(3aS,4S,8bS,E)-8,8-dimethyl-3-(((R)-4-methyl-5-oxo-2,5-dihydrofuran-2-yloxy)methylene)-2-oxo-3,3a,4,5,6,7,8,8b-octahydro-2H-indeno[1,2-b]furan-4-yl acetate], by 1D and 2D NMR spectroscopy and ESI- and EI-MS spectrometry. Orobanchyl acetate afforded an [M-42](+) ion in EI-MS and thus had been recognized as an isomer of strigol. Orobanchyl acetate was detected in root exudates of soybean (Glycine max L.) and cowpea (Vigina unguiculata L.) along with orobanchol.
authors.affiliation: Weed Science Center, Utsunomiya University, 350 Mine-machi, Utsunomiya 321-8505, Japan.
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Xie
authors.forename: Kaori
authors.initials: K
authors.lastname: Yoneyama
authors.forename: Dai
authors.initials: D
authors.lastname: Kusumoto
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Yamada
authors.forename: Takao
authors.initials: T
authors.lastname: Yokota
authors.forename: Yasutomo
authors.initials: Y
authors.lastname: Takeuchi
authors.forename: Koichi
authors.initials: K
authors.lastname: Yoneyama
mesh_terms: D018525:Germination / Q000187:drug effects*; D007783:Lactones / Q000737:chemistry* / Q000302:isolation & purification* / Q000378:metabolism; D031672:Orobanche / Q000187:drug effects* / Q000254:growth & development*; D018517:Plant Roots / Q000187:drug effects* / Q000254:growth & development*; D013237:Stereoisomerism