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Acidification stress of root environment as related to endogenous cytokinins and gibberellins in oak seedlings

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Biologia Plantarum

Abstract

Activity of endogenous cytokinins and gibberellins was determined in the shoots and roots of oak seedlings following the submersion of roots in water acidified with sulphuric add to pH 3.0, 2.5, 2.0, 1.7 and 5.6 (control) for 6 and 72 h. After 6 h the cytokinins increased in the shoots and in roots at pH 2.5 and 2.0, respectively. None of the tested pH values decreased the cytokinin activity. The acidification of solutions exhibited no remarkable influence on gibberellin activity. Only slight stimulation of the gibberellin activity was exhibited at pH 2.0. After 72 h a slight decrease in the activity of cytokinins was observed in the shoots at pH 2.5, remarkable decrease was revealed at pH 2.0 and 1.7. Nevertheless, in the roots stimulation of cytokinin activity appeared up to pH 2.0 (the highest at pH 2.5), and significant decrease was shown at pH 1.7. The activity of gibberellins in shoots showed similar dependence of changes as the activity of cytokinins in roots. Acidification stress exerted no influence on the gibberellin. activity in roots.

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Authors and Affiliations

  1. Institute of Systematic and Ecological Biology, Czechoslovak Academy of Sciences, Poríĉí 3b, 603 00, Brno, Czechoslovakia

    Radmila ĈĺŽková

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  1. Radmila ĈĺŽková
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ĈĺŽková, R. Acidification stress of root environment as related to endogenous cytokinins and gibberellins in oak seedlings. Biol Plant 32, 97–103 (1990). https://doi.org/10.1007/BF02897547

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  • DOI: https://doi.org/10.1007/BF02897547

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