The effect of stratification on endogenous cytokinin levels in seeds of Acer saccharum.
Stratification of sugar maple seed resulted in high levels of cytokinins after 20 days. A further increase in the chilling period led to a decrease in cytokinins. Most of the cytokinin activity detected was due to compound(s) that co-chromatographed with zeatin.It is concluded that this increase in cytokinins may result in the breaking of dormancy, perhaps by overcoming the effect of endogenous inhibitors.
Botany Department, University College of Wales, Aberystwyth, UK.
J
J
van Staden
D P
DP
Webb
P F
PF
Wareing