title: 3 beta,13-dihydroxylated C20 gibberellins from inflorescences of Rumex acetosa L.
abstract: Using full scan GC-MS a wide range of gibberellins (GAs) was identified in the young inflorescences of the dioecious species Rumex acetosa L., consistent with the ubiquitous early 13-hydroxylation pathway in both male and female plants. In addition, R. acetosa is the first species in which all three 3beta,13-dihydroxylated C(20)-GAs-GA(18), GA(38) and GA(23)-have been identified in the same organism, suggesting an early 3beta,13-dihydroxylation biosynthesis pathway in this species. Authentic GA(18), GA(38) and GA(23) were synthesized and their effects and that of GA(1), a GA common to both pathways, on the time to inflorescence emergence was investigated. GA(1) accelerated the emergence of inflorescences in both male and female plants. In addition some evidence for biological activity per se of the C(20)-GA(38) was obtained.
authors.affiliation: Plant Sciences Division, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK. tania.stokes@nottingham.ac.uk
authors.forename: Tania S
authors.initials: TS
authors.lastname: Stokes
authors.forename: Lewis N
authors.initials: LN
authors.lastname: Mander
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Croker
authors.forename: Bruce
authors.initials: B
authors.lastname: Twitchin
authors.forename: David E
authors.initials: DE
authors.lastname: Hanke
mesh_terms: D035264:Flowers / Q000737:chemistry* / Q000187:drug effects / Q000254:growth & development; D005875:Gibberellins / Q000032:analysis* / Q000737:chemistry* / Q000494:pharmacology; D006900:Hydroxylation; D015394:Molecular Structure; D031804:Rumex / Q000737:chemistry* / Q000187:drug effects / Q000254:growth & development; D013997:Time Factors
chemical_list: D005875:Gibberellins