title: Identification of endogenous gibberellins from sorghum.
abstract: Gibberellins (GA) A(1), A(19), and A(20) were identified in shoot cylinders containing the apical meristems from sorghum (Sorghum bicolor L.). Extracts were purified by sequential SiO(2) partition chromatography and reversed-phase C(18) high performance liquid chromatography and biologically active (dwarf rice cv Tan-ginbozu microdrop assay) fractions were subjected to gas chromatography-selected ion monitoring. Based on the use of [(3)H]GA and [(2)H](d(2))GA internal standards, amounts of GA(1), GA(19), and GA(20) were estimated to be 0.7, 8.8, and 1.5 namograms per gram dry weight of tissue, respectively.
authors: Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta T1K 3M4, Canada.
authors: S B
authors: SB
authors: Rood
authors: K M
authors: KM
authors: Larsen
authors: L N
authors: LN
authors: Mander
authors: H
authors: H
authors: Abe
authors: R P
authors: RP
authors: Pharis