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The effect of decapitation on the levels of IAA and ABA in the lateral buds of Betula pendula roth

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Abstract

The level of IAA and ABA in lateral buds of birch shoots 24 h and 5 days after the decapitation of the apical bud was determined.

Twenty four hours after decapitation, when visible signs of outgrowth of lateral buds were not observed yet, an increase in the level of IAA and a decrease of ABA, as compared with the buds of non-decapitated shoots, was found.

Five days later, when lateral buds were in the period of intensive outgrowth, a decrease in the levels of IAA and ABA was observed.

It has been suggested that removing the source of auxin, by the decapitation of the apical bud makes possible the lateral buds to undertake the synthesis of their own auxin. It could lead to the decrease in the content of ABA. These all events could create suitable conditions for the outgrowth of lateral shoots.

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Authors and Affiliations

  1. Department of Plant Physiology and Morphogenesis, Institute of General and Molecular Biology, Nicholas Copernicus University, Gagarina 9 Street, 87-100, Toruń, Poland

    Elżbieta Galoch, Marlena Zielińska & Elżbieta Burkacka-Łaukajtys

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  1. Elżbieta Galoch
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  2. Marlena Zielińska
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  3. Elżbieta Burkacka-Łaukajtys
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Galoch, E., Zielińska, M. & Burkacka-Łaukajtys, E. The effect of decapitation on the levels of IAA and ABA in the lateral buds of Betula pendula roth. Acta Physiol Plant 20, 399–403 (1998). https://doi.org/10.1007/s11738-998-0026-0

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  • DOI: https://doi.org/10.1007/s11738-998-0026-0

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