1Received for publication May 4, 1981.
The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.
2Present address: Department of Plant Science, University of Connecticut, Storrs, CT 06268.
3The authors acknowledge Yoder Brothers, Inc., Barberton, OH 44203 for providing the chrysanthemum cuttings used in these studies and Helen H. Kubis and Robert A. Spaulding for technical assistance.
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