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Ice Formation and the Affects of Cold Acclimation on Cold Hardiness in a Subtropical Fruit Species


Metadata FieldValueLanguage
dc.contributor.advisorEbel, Robert
dc.contributor.advisorFindley, Douglasen_US
dc.contributor.advisorHimelrick, Daviden_US
dc.contributor.advisorSibley, Jeffrey L.en_US
dc.contributor.authorCarter, Philipen_US
dc.date.accessioned2008-09-09T21:14:25Z
dc.date.available2008-09-09T21:14:25Z
dc.date.issued2007-12-15en_US
dc.identifier.urihttp://hdl.handle.net/10415/141
dc.description.abstractFruit production in the southeastern United States is highly vulnerable to freezes. Understanding the mechanism of damage in various fruit crops leads to methods for mitigation of damage through direct protection, cultural practices, and genetic modification to enhance cold hardiness. The current study was conducted to assess the pattern of ice formation in stems and/or leaf tissue of Satsuma mandarins (Citrus unshiu (Marc.) ‘Owari’) at various stages of acclimation. Plants, were subjected to subfreezing temperatures. Ice formation was measured in stems using differential thermal analysis. The first exotherm was bulk xylem water freezing, with secondary exotherms, when present, associated with tissue death. The temperature differential of the first exotherm varied with air temperature and acclimation treatment, indicating a differential rate and amount of ice formation. Watersoaking and electrolyte leakage of leaves usually corresponded with the peak of the first stem exotherm, with the rate of electrolyte leakage being a function of acclimation and temperature treatment. For some treatments, leaf electrolyte leakage leveled off at 50%, which was attributed to a differential response of leaf tissues to treatments. Leaf death occurred when electrolyte leakage was greater than 50%.en_US
dc.language.isoen_USen_US
dc.subjectHorticultureen_US
dc.titleIce Formation and the Affects of Cold Acclimation on Cold Hardiness in a Subtropical Fruit Speciesen_US
dc.typeThesisen_US
dc.embargo.lengthNO_RESTRICTIONen_US
dc.embargo.statusNOT_EMBARGOEDen_US

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