Abstract:
Leaves from seedlings of Pinus taeda and Pinus palustris were tested for resistance to low temperature from summer into mid-winter in Southern Connecticut. Pinus palustris was capable of hardening from - 10 to - 15C., but greenhouse seedling did as well as field seedlings in this regard, suggesting the lack of a temperature induction mechanism for hardiness development. Pinus taeda was capable of hardening from about - 12 to - 14C., but only in the case of field-kept seedlings. The general weakness of the hardening mechanism in these two species helps to support the idea that low temperatures limit their northern geographical range.
Page(s):
156-160
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Forestry, Volume: 15, Issue: 2, Year: 1965