title: Effects of 17-alkyl-16,17-dihydrogibberellin A(5) derivatives on growth and flowering in Lolium temulentum.
abstract: Several gibberellins in which the 16-methyl group of the 16-epimers of dihydro-GA(5) had been replaced by ethyl, n-propyl and n-butyl were prepared and tested at doses of 1, 5 or 25&mgr;g per plant for their effects on stem growth and flowering of the grass Lolium temulentum. The ethyl and n-propyl derivatives were most inhibitory of elongation, the exo-isomers being more active than the endo-forms. While both isomers of dihydro-GA(5) promoted flowering, among the 17-alkyl analogues, only the exo-ethyl derivative showed significant activity.
authors.affiliation: Research School of Chemistry, Australian National University, A.C.T. 2601, Canberra, Australia
authors.forename: Lewis
authors.initials: L
authors.lastname: N Mander
authors.forename: George
authors.initials: G
authors.lastname: Adamson
authors.forename: Vijaya K.
authors.initials: VK
authors.lastname: Bhaskar
authors.lastname: Bruce Twitchin
authors.forename: David
authors.initials: D
authors.lastname: Camp
authors.forename: Rod W.
authors.initials: RW
authors.lastname: King
authors.forename: Lloyd T.
authors.initials: LT
authors.lastname: Evans