Petunia pp 92-110 | Cite as


  • P. D. Ascher
Part of the Monographs on Theoretical and Applied Genetics book series (GENETICS, volume 9)


Interactions between the pollen tube or pollen grain and the sporophytic tissue of the pistil control development of the male gametophyte in self-incompatible (SI) angiosperms. Matching specificities coded by alleles at the S (incompatibility) locus alter pollen germination or pollen tube growth such that fertilization does not occur. Numerous S alleles exist for most SI species and are identified by subscript numbers. An important feature of SI is that both male and female gametes are functional but inbreeding is prevented.


Sugar Sucrose Starch Hydrate Depression 


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Copyright information

© Springer-Verlag Berlin Heidelberg 1984

Authors and Affiliations

  • P. D. Ascher
    • 1
  1. 1.Dept. of Horticultural ScienceUniversity of MinnesotaSt. PaulUSA

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