© 1996 Heron Publishing—Victoria, Canada
Comparing stem respiration and growth of jack pine provenances from northern and southern locations
M. B. Lavigne
Canadian Forest Service–Maritimes Region, Natural Resources Canada, P.O. Box 4000, Fredericton, NB E3B 5P7, Canada / Received February 28, 1995
Summary
Stem respiration rates of 31-year-old jack pine (Pinus banksiana Lamb.) trees from northern and southern provenances growing in a common garden were compared. At 15 °C, the seasonal course
of stem respiration rate of northern provenances was not statistically different from that of southern provenances. A relationship
existed between maintenance respiration rate and stem growth rate. Because relationships between sapwood relative growth rate
and annual growth and maintenance respiration rates were similar for northern and southern provenances, no clinal differences
in stem respiration rates were observed.
Keywords:
climate change, growth respiration, maintenance respiration.
