title: Gibberellins in mature apple seeds - contaminants?
abstract: Evidence is presented that gibberellins A4 and A7, previously identified (Sinska, I., Lewak, St., Gaskin, P., MacMillan, J., Planta 114, 359-364, 1973) in extracts of mature apple (Pyrus malus L.) seeds, were present primarily as contaminants. The facts supporting this conclusion are: a) the ratio of GA4 to GA7 was similar to that of a standard mixture; b) the concentrations were extremely high; and c) the ratio of GA4 to GA7 did not change during stratification, as had been reported when extracts were bioassayed (Sinska, I., and Lewak, St., Physiol. Vég. 8, 661-667, 1970).
authors: Department of Horticulture, Michigan State University, 48824, East Lansing, MI, USA.
authors: F G
authors: FG
authors: Dennis
authors: G C
authors: GC
authors: Martin
authors: P
authors: P
authors: Gaskin
authors: J
authors: J
authors: Macmillan