Allogeneic Distinction in Botryllus primigenus and in other Colonial Ascidians

  • Kunio Tanaka
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 64)


Certain species of colonial ascidians have colony specificity or the ability to distinguish self colonies from not-self colonies within the same species. In Botryllus primigenus, when a colony recognizes another as belonging to the self strain, both colonies fuse with each other to form one colony (designated as “fusion”). On the contrary, when colonies of a not-self strain come into contact, they do not fuse, and a necrotic zone occurs at the contact surface between the two colonies (designated as “nonfusion”).


Fusion Experiment Early Fusion Japan Acad Fusible Combination Colonial Ascidian 
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Copyright information

© Springer Science+Business Media New York 1975

Authors and Affiliations

  • Kunio Tanaka
    • 1
  1. 1.Department of PharmacologyKitasato University School of MedicineSagamihara, Kanagawa, 228Japan

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