Cell and Tissue Research

, Volume 159, Issue 3, pp 387–397

The dormant buds of Rhabdopleura compacta (Hemichordata)

  • P. N. Dilly
Article

Summary

Rhabdopleura has an overwintering stage that consists of two layers of cells surrounding a central yolk mass. This cellular part is surrounded by a thick electron dense capsule which is secreted by the bud itself. The capsule is probably impervious and protective to its contents.

Blood vessels join the buds to the zooids of the colony. They form the probable route of transfer of yolk from the zooids to the dormant bud.

The capsule of the dormant bud has some structural features in common with the black stolon of the adult zooids. The black stolon is probably formed in a manner similar to that which made the fusellar fabric of the periderm of fossil graptolities.

Key words

Dormant bud (RhabdopleuraCapsule Winter survival Yolk store Electron microscopy 

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Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • P. N. Dilly
    • 1
  1. 1.Department of AnatomyUniversity College LondonLondon
  2. 2.Dept. of Anatomy and EmbryologyUniversity College LondonLondonEngland

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