title: Strigolactones, host recognition signals for root parasitic plants and arbuscular mycorrhizal fungi, from Fabaceae plants.
abstract: Both root parasitic plants and arbuscular mycorrhizal (AM) fungi take advantage of strigolactones, released from plant roots as signal molecules in the initial communication with host plants, in order to commence parasitism and mutualism, respectively. In this study, strigolactones in root exudates from 12 Fabaceae plants, including hydroponically grown white lupin (Lupinus albus), a nonhost of AM fungi, were characterized by comparing retention times of germination stimulants on reverse-phase high-performance liquid chromatography (HPLC) with those of standards and by using tandem mass spectrometry (LC/MS/MS). All the plant species examined were found to exude known strigolactones, such as orobanchol, orobanchyl acetate, and 5-deoxystrigol, suggesting that these strigolactones are widely distributed in the Fabaceae. It should be noted that even the nonmycotrophic L. albus exuded orobanchol, orobanchyl acetate, 5-deoxystrigol, and novel germination stimulants. By contrast to the mycotrophic Fabaceae plant Trifolium pratense, in which phosphorus deficiency promoted strigolactone exudation, neither phosphorus nor nitrogen deficiency increased exudation of these strigolactones in L. albus. Therefore, the regulation of strigolactone production and/or exudation seems to be closely related to the nutrient acquisition strategy of the plants.
authors.affiliation: Weed Science Center, Utsunomiya University, 350 Mine-machi, Utsunomiya 321-8505, Japan.
authors.forename: Kaori
authors.initials: K
authors.lastname: Yoneyama
authors.affiliation: Weed Science Center, Utsunomiya University, 350 Mine-machi, Utsunomiya 321-8505, Japan.
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Xie
authors.affiliation: Faculty of Agriculture, Utsunomiya University, 350 Mine-machi, Utsunomiya 321-8505, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Sekimoto
authors.affiliation: Weed Science Center, Utsunomiya University, 350 Mine-machi, Utsunomiya 321-8505, Japan.
authors.forename: Yasutomo
authors.initials: Y
authors.lastname: Takeuchi
authors.affiliation: Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuencho, Naka-ku, Sakai, Osaka 599-8531, Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Ogasawara
authors.affiliation: Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuencho, Naka-ku, Sakai, Osaka 599-8531, Japan.
authors.forename: Kohki
authors.initials: K
authors.lastname: Akiyama
authors.affiliation: Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuencho, Naka-ku, Sakai, Osaka 599-8531, Japan.
authors.forename: Hideo
authors.initials: H
authors.lastname: Hayashi
authors.affiliation: Weed Science Center, Utsunomiya University, 350 Mine-machi, Utsunomiya 321-8505, Japan.
authors.forename: Koichi
authors.initials: K
authors.lastname: Yoneyama
mesh_terms: D007887:Fabaceae / Q000737:chemistry* / Q000378:metabolism*; D007783:Lactones / Q000737:chemistry* / Q000378:metabolism*; D015394:Molecular Structure; D038821:Mycorrhizae / Q000378:metabolism*; D009584:Nitrogen / Q000737:chemistry / Q000378:metabolism; D010758:Phosphorus / Q000737:chemistry / Q000378:metabolism; D018517:Plant Roots / Q000737:chemistry / Q000378:metabolism*; D015398:Signal Transduction
chemical_list: D007783:Lactones; D010758:Phosphorus; D009584:Nitrogen