RT Journal Article
SR Electronic
T1 An Analysis of the Gibberellic and Abscisic Acid Content of White Ash Seeds
JF Arboriculture & Urban Forestry (AUF)
FD International Society of Arboriculture
SP 283
OP 285
DO 10.48044/jauf.1984.060
VO 10
IS 10
A1 C.L. Stinemetz
A1 B.R. Roberts
YR 1984
UL http://auf.isa-arbor.com/content/10/10/283.abstract
AB Using high performance liquid chromatography, the content of gibberellic acid (GA) and abscisic acid (ABA) was examined in white ash seeds (Fraxinus americana) ranging in age from 1 to 10 years. The youngest seeds exhibited the highest level of GA, after which the GA content decreased rapidly. The greatest concentration of ABA was found in 4-yr-old seed. Germination tests showed that germination rate could be enhanced in older seeds with lower concentrations of exogenous GA. Furthermore, the germination of seeds receiving no exogenous GA showed a high positive correlation to fluctuations in the endogenous GA:ABA ratio. Thus, the initiation of germination in white ash seeds appears to be affected by the relative concentrations of these two hormones.