Triploid Watermelon Seed Orientation Affects Seedcoat Adherence on Emerged Cotyledons

in HortScience
Donald N. MaynardGulf Coast Research and Education Center, IFAS, University of Florida, Bradenton, FL 34203

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Seedcoat adherence to emerged cotyledons of seedless watermelons (Citrullus lanatus (Thunb.) Matsum & Naki) results in distortion of seedlings that effectively restricts the number of productive plants in a planting. Significantly fewer seedcoats adhered to cotyledons when seeds were oriented with the radicle end up at a 45° or 90° angle than when seeds were oriented horizontally or with the radicle end down at a 45° or 90° angle. Emergence was not affected by seed orientation.

Contributor Notes

Professor of Vegetable Crops.

Received for publication 14 Nov. 1988. Florida Agr. Expt. Sta. J. Ser. no. 9437. Helpful discussion with J.M. Crall on this problem is acknowledged. 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.

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