Cytoplasmic streaming in the root cortex and its role in the delivery of potassium to the shoot |
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Authors: | Anthony D M Glass James E Perley |
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Institution: | (1) Department of Botany, University of Britisy Columbia, V6T 1W5 Vancouver, B.C., Canada;(2) Department of Biology, College of Wooster, 44691 Wooster, OH, USA |
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Abstract: | The influence of cytochalasin B (CB), a potent inhibitor of cytoplasmic streaming, on 86Rb-labelled K+ translocation by detopped Lycopersicon esculentum Mill., Cucumis sativus L. and Zea mays L. plants was examined by measuring the radioactivity in xylem exudate before and after the addition of CB to the medium bathing the roots. CB caused complete cessation of cytoplasmic streaming in root segments within 15 min but was without effect on either total 86Rb uptake or exudation. Thus factors other than cytoplasmic streaming limit the movement of K+ across the symplast of the root of higher plants. |
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Keywords: | Cytochalasin B Cytoplasmic streaming Potassium translocation Koots (K+ translocation) Translocation (K+) |
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