Uptake and translocation of calcium in cucumber |
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Authors: | Bengt Bengtsson |
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Affiliation: | B. Bengtsson, Dept. of Plant Phyhsiology Physiology, Univ. of Lund, Box 7007, S-220 07 Lund, Sweden. |
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Abstract: | Uptake and translocation of Ca2+(45Ca) were compared with water translocation in 12-day old intact plants and excised roots of cucumber ( Cucumis sativus L. var. Cilla), which had been cultivated in nutrient solution. No immediate reduction of Ca2+ uptake was found when water translocation was reduced by excision of the shoot. In the presence of 2,4-dinitrophenol Ca2+ translocation was reduced in the intact plants while water translocation was unchanged. It is suggested that regulation of Ca2+ uptake is primarily achieved in the root. The DNP-sensitive mechanism of Ca2+ uptake was associated with the root and probably represented transport through the endodermis into the stele. |
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Keywords: | Cucumis sativus dinitrophenol exudation water |
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