title: Myxostiolide, myxostiol, and clavatoic acid, plant growth regulators from the fungus Myxotrichum stipitatum.
abstract: New plant growth regulators, named myxostiolide (1), myxostiol (2), and clavatoic acid (3), have been isolated from Myxotrichum stipitatum, and their structures have been established by spectroscopic methods including 2D NMR. The biological activities of 1, 2, and 3 have been examined using tea pollen and lettuce seedling bioassay methods. With tea pollen, compound 1 inhibited the pollen tube growth to 14% of control at a concentration of 100 mg/L. With lettuce seedlings, compound 2 accelerated the root growth from 1 mg/L to 100 mg/L and compound 3 inhibited the root growth, to 52% of control, at a concentration of 100 mg/L.
authors.affiliation: Department of Biological and Environmental Chemistry, Faculty of Agriculture, Tottori University, Koyama, Tottori-shi 680-8553, Japan.
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Kimura
authors.forename: Atsumi
authors.initials: A
authors.lastname: Shimada
authors.forename: Miyako
authors.initials: M
authors.lastname: Kusano
authors.forename: Katsunobu
authors.initials: K
authors.lastname: Yoshii
authors.forename: Akiko
authors.initials: A
authors.lastname: Morita
authors.forename: Masahiko
authors.initials: M
authors.lastname: Nishibe
authors.forename: Shozo
authors.initials: S
authors.lastname: Fujioka
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Kawano
mesh_terms: D001565:Benzoates / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002855:Chromatography, Thin Layer; D004305:Dose-Response Relationship, Drug; D005658:Fungi / Q000737:chemistry*; D018545:Lactuca / Q000187:drug effects / Q000254:growth & development; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010937:Plant Growth Regulators / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development; D011058:Pollen / Q000187:drug effects; D011714:Pyrans / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D017550:Spectroscopy, Fourier Transform Infrared; D013237:Stereoisomerism
chemical_list: D001565:Benzoates; D010937:Plant Growth Regulators; D011714:Pyrans; C457255:clavatoic acid; C457254:myxostiol; C457253:myxostiolide