(1) Department of Biology, University of Waterloo, 200 University Ave, Waterloo, Ontario, N2L3G1, Canada;(2) Department of Biology, Trent University, 1600 West Bank Drive, Peterborough, Ontario, K9J7B8, Canada
Abstract:
Although it is well accepted that cytokinins (CKs) regulate processes such as leaf senescence and stomatal conductance, data on CKs in the canopy of mature trees are lacking in the literature. Here we report the first in situ sampling for determination of CKs in mature sugar maple (Acer saccharum) canopy layers. The upper canopy showed a distinct seasonal pattern in total CK content, while the lower canopy remained relatively unchanged.This project was supported by an NSERC Discovery Grant to RJNE.
