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Variation in Cold‐Hardiness of Fraxinus Americana Stem Tissue According to Geographic Origin
Author(s) -
Alexander Nancy L.,
Flint Harrison L.,
Hammer P. Allen
Publication year - 1984
Publication title -
ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.144
H-Index - 294
eISSN - 1939-9170
pISSN - 0012-9658
DOI - 10.2307/1938316
Subject(s) - hardiness (plants) , frost (temperature) , latitude , provenance , fraxinus , biology , longitude , phenology , sowing , ecology , geography , botany , forestry , meteorology , cultivar , paleontology , geodesy
Cold—hardiness of stem sections of white ash (Fraxinus americana L.) from 10 geographic origins in eastern North America, growth in a provenance planting in south Michigan, was determined by controlled freezing. Northern plants were more cold—hardy than southern plants in early and midwinter, but differences disappeared by early spring. Substantial variation in cold—hardiness was found among trees within each origin. Multiple regression of killing temperatures on latitude, longitude, elevation, average annual minimum temperature, and annual frost—free period proved useful in predicting cold—hardiness, and may be useful in forecasting performance of trees in locations removed from their sites of origin.