The Effect of Temperature, Photoperiod, and Freeze Treatment on the Morphology of Chrysanthemum X morifolium Ramat. ‘Astrid’1

in Journal of the American Society for Horticultural Science
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  • 1 Department of Horticulture, University of Wisconsin-Madison, Madison, WI 53706


More rhizomes were initiated by plants of ‘Astrid’ chrysanthemum grown in short day and cool air temperature than in long day and warm air. Rhizome development was greatest, shoot growth was enhanced, and root length and dry weight increased with warm compared to cool soil temperature. Rhizomes grown at a cool soil temperature either in long or short days had the least cellular injury after exposure to –8°C.

Contributor Notes

Received for publication Dec. 7, 1981. Research supported by the College of Agricultural and Life Sciences, University of Wisconsin-Madison and by grants from the New York Florists’ Club. This research was conducted in partial fulfillment of the requirements of the PhD degree by the senior author, Department of Horticulture, University of Wisconsin-Madison.

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