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Long-Distance Transport of Alkali Metals in Maturing Wheat

Zeller, S. ; Feller, U.

In: Biologia Plantarum, 2000, vol. 43, no. 4, p. 523-528

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    Titre
    • Long-Distance Transport of Alkali Metals in Maturing Wheat
    Auteur
    • Zeller, S.. Institute of Plant Sciences, University of Berne, Altenbergrain 21, CH-3013, Berne, Switzerland
    • Feller, U.. Institute of Plant Sciences, University of Berne, Altenbergrain 21, CH-3013, Berne, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Biologia Plantarum, 2000, vol. 43, no. 4, p. 523-528. Kluwer Academic Publishers
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:319359
    Summary
    The alkali metals cesium, rubidium, lithium and sodium were introduced together with strontium via flaps into leaf laminas or into the stem of maturing, intact winter wheat (Triticum aestivum L. cv. Arina) grown in a field. Long-distance transport of these elements and the influence of the application date and of different application positions were investigated. The phloem-immobile Sr served as a marker for the distribution of the xylem sap in the plants. Dry matter accumulation in the grains and the transpiration per shoot were not markedly affected by the treatments as compared to control plants. The phloem mobility was rather high for Cs and Rb. Li was almost immobile in the phloem (similarly to Sr). An application into the cut stem xylem below the second leaf node contributed more to the contents in the grains than an application into the flag leaf. An earlier feeding date led to a higher accumulation in the grains. The marked losses of the elements applied during maturation (most pronounced for Li) can be explained by leakage in the rain