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Developmental studies on regenerates ofCallithamnion roseum Harvey

Part I. The development of a typical regenerate

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Summary

Diploid regenerates ofCallithamnion roseum were grown in bacterized, enriched sea water media. Their development from single cells or cell filaments was followed by photomicrography and microcinematography. The apical growth pattern of the regenerates consists of a recurring alternation of oblique unequal apical divisions and subsequent segment cell elongations, with the formation of protrusions which gradually develop into branches. The regular alternation of oblique mitotic spindles as an underlying factor of basic cell structure is discussed. A definite correlation was found between the formation of oblique crosswalls and branching.

The author wishes to express her gratitude to professor Ralph O. Ericks on for his valuable help and advice during the course of this study, and the preparation of the manuscript. The helpful suggestions of Dr. Paul B. Green and Dr. Luigi Provasoli are also gratefully acknowledged.

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Authors and Affiliations

  1. Department of Biological Sciences, University of Delaware, USA

    Eva Konrad-Hawkins

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  1. Eva Konrad-Hawkins
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Submitted to the Faculty of the Graduate School of Arts and Sciences of the University of Pennsylvania (Philadelphia) with Part II, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.

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Konrad-Hawkins, E. Developmental studies on regenerates ofCallithamnion roseum Harvey. Protoplasma 58, 42–59 (1964). https://doi.org/10.1007/BF01252618

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  • DOI: https://doi.org/10.1007/BF01252618

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