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Cytokinin application to the shoot apical meristem of Sinapis alba enhances secondary plasmodesmata formation

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Abstract

A single application of cytokinin benzyladenine causes a threefold increase in the frequency of plasmodesmata in the vegetative shoot apical meristem (SAM) of Sinapis alba plants. This increase is observed 20 h after application within all cell layers (L1, L2, L3) as well as at the interfaces between these layers. Evidence is presented indicating that cytokinin promotes mainly the formation of new secondary plasmodesmata. A similar increase in the frequency of secondary plasmodesmata was observed in the Sinapis SAM during the floral transition induced by a single long day, suggesting that this effect of the long day is mediated by cytokinin.

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Abbreviations

BA:

Benzyladenine

LD:

Long day

SAM:

Shoot apical meristem

SD:

Short days

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Acknowledgments

The authors are grateful to Dr. A. Havelange and R. Deltour for helpful discussions, Dr. P. Tocquin for his computer facilities and N. Detry for technical assistance. This work was supported by the Interuniversity Attraction Poles Programme (Belgian State, Federal Office for Scientific, Technical and Cultural Affairs; P4/15).

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Authors and Affiliations

  1. Laboratory of Plant Physiology, Department of Life Sciences, University of Liège, B22 Sart Tilman, 4000, Liege, Belgium

    Sandra Ormenese, Georges Bernier & Claire Périlleux

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  1. Sandra Ormenese
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  2. Georges Bernier
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  3. Claire Périlleux
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Correspondence to Claire Périlleux.

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Ormenese, S., Bernier, G. & Périlleux, C. Cytokinin application to the shoot apical meristem of Sinapis alba enhances secondary plasmodesmata formation. Planta 224, 1481–1484 (2006). https://doi.org/10.1007/s00425-006-0317-x

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  • DOI: https://doi.org/10.1007/s00425-006-0317-x

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