Gibberellins in mature apple seeds — contaminants?

摘要

Evidence is presented that gibberellins A4and A7, previously identified (Sinska, I., Lewak, St., Gaskin, P., MacMillan, J., Planta 114, 359–364, 1973) in extracts of mature apple (Pyrus malusL.) seeds, were present primarily as contaminants. The facts supporting this conclusion are: a) the ratio of GA4to GA7was similar to that of a standard mixture; b) the concentrations were extremely high; and c) the ratio of GA4to GA7did not change during stratification, as had been reported when extracts were bioassayed (Sinska, I., and Lewak, St., Physiol. Vég. 8, 661–667, 1