Evidence for Non-Random Fertilization in the Common Zucchini, Cucurbita pepo

  • A. G. Stephenson
  • J. A. Winsor
  • C. D. Schlichting


Over the last 15 years, several studies have shown that the progeny produced under conditions of intense pollen tube competition are more vigorous than progeny produced under conditions of little or no pollen tube competition (see review by Mulcahy and Mulcahy 1987). Recent studies from our lab have shown that zucchini (Cucurbita pepo L., Cucurbitaceae) seeds resulting from large pollen loads (intense pollen competition) germinate more rapidly, exhibit greater growth as seedlings and have greater reproductive output as adult plants than seeds resulting from low pollen loads (Stephenson et al. 1986; Davis et al. 1987; Winsor et al. 1987).


Pollen Tube Pollen Tube Growth Mature Fruit Pollen Load Staminate Flower 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • A. G. Stephenson
    • 1
  • J. A. Winsor
    • 1
  • C. D. Schlichting
    • 1
  1. 1.Department of BiologyThe Pennsylvania State UniversityUniversity ParkUSA

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