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Cycles of hyperactivity in tapetal cells

  • Conference paper
The Tapetum

Part of the book series: Plant Systematics and Evolution ((SYSTEMATICS,volume 7))

Abstract

The tapetum is an exceptional plant tissue. As part of differentiation of tapetal cells their walls and plasmodesmata lyse, and then the cells become free to move, to extents specific for taxa. As differentiation continues organelles of tapetal cells show structural changes characteristic of secretory cells, and cell activities are not synchronized. The dedifferentiation and redifferentiation that takes place in tapetal cells is probably rather unusual for plant cells. The highly modified cells become again undifferentiated, plasmodesmata form, and the entire tapetum becomes synchronized. The tapetal cells undergo mitosis without a subsequent cytoplasmic division. A function of the mitoses could be to clean up the genetic code. Plasmodesmata of tapetal cells can be formed without a centrifugally expanding cell plate. It seems that coordination between cells does not occur without plasmodesmata. Tapetal cells together with plasmodesmata form a symplast, as in most plant cells having synchronization of activities.

Those tapetal systems I have studied show a number of cycles of differentiation followed by insertion of plasmodesmata, mitosis, and redifferentiation: Pinus sylvestris L. (Pinaceae),Echinodorus cordifolius (L.) GRISEB. (Alismataceae), Nymphaea colorata PETER (Nymphaeaceae),and Quercus robur L. (Fagaceae).

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Author information

Authors and Affiliations

  1. Botany Department, University of Stockholm, S-106 91, Stockholm, Sweden

    John R. Rowley

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  1. John R. Rowley
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Editors and Affiliations

  1. Institut für Botanik und Botanischer Garten, Universität Wien, Austria

    M. Hesse

  2. Dipartimento di Biologia Ambientale, Universitá degli Studi di Siena, Italy

    E. Pacini

  3. Department of Plant Cytology and Morphology, Agricultural University Wageningen, The Netherlands

    M. Willemse

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© 1993 Springer-Verlag Wien

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Rowley, J.R. (1993). Cycles of hyperactivity in tapetal cells. In: Hesse, M., Pacini, E., Willemse, M. (eds) The Tapetum. Plant Systematics and Evolution, vol 7. Springer, Vienna. https://doi.org/10.1007/978-3-7091-6661-1_3

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  • DOI: https://doi.org/10.1007/978-3-7091-6661-1_3

  • Publisher Name: Springer, Vienna

  • Print ISBN: 978-3-7091-7373-2

  • Online ISBN: 978-3-7091-6661-1

  • eBook Packages: Springer Book Archive

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