Cold Hardiness and Deep Supercooling of Hardwoods: Its Occurrence in Provenance Collections of Red Oak, Yellow Birch, Black Walnut, and Black Cherry

Fully cold-acclimated dormant twigs from provenance collections of red oak (Quercus rubra L.), yellow birch (Betula lutea Michx. F.), black walnut (Juglans nigra L.), and wild black cherry (Prunus serotina Ehrh.) were collected in winter 1975. Stem sections from latest season's growth were evaluated... Ausführliche Beschreibung

1. Person: George, Milon F.
Weitere Personen: Hong, Sung Gak verfasserin; Burke, Michael J. verfasserin
Quelle: in Ecology : a publication of the Ecological Society of America Vol. 58, No. 3 (1977), p. 674-680
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Format: Online-Artikel
Sprache: English
Veröffentlicht: 1977
Beschreibung: Online-Ressource
Schlagworte: research-article
Cold hardiness
deep supercooling
exotherm
hardwoods
homogeneous nucleation temperature
provenance collection
xylem
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Anmerkung: Copyright: Copyright 1977 The Ecological Society of America
Zusammenfassung: Fully cold-acclimated dormant twigs from provenance collections of red oak (Quercus rubra L.), yellow birch (Betula lutea Michx. F.), black walnut (Juglans nigra L.), and wild black cherry (Prunus serotina Ehrh.) were collected in winter 1975. Stem sections from latest season's growth were evaluated for freezing of a deep supercooled fraction of their stem H"2O which froze anomalously at their killing temperature. Results show that all trees within each provenance collection have low temperature freezing points for stem H"2O between -38@? and -@/C. Generally no correlations were found in simple linear regression analyses comparing the low temperature freezing points with average annual minimum temperature or latitude for each geographic seed source. All trees throughout the natural ranges of the species investigated are capable of attaining a freezing resistance in the vicinity of -40@?C. Additional analysis on red oak demonstrated a 25% decrease in the amount of deep supercooling H"2O for northern versus southern samples.
ISSN: 1939-9170

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