CALCIUM-TRANSPORT AND ITS MICROAUTORADIOGRAPHIC LOCALIZATION IN THE TISSUE

The objective of the investigation was to localize in short-term experiments the pathway of Ca along its acropetal long distance transport, especially to the fruit. An easy lateral transfer from the conducting vessels to the adjacent tissues was demonstrated. After root uptake by strawberries, and even after pulse labeling by injection of 45Ca into the fruit stalk, a substantial amount of the radioactivity was always present in the phloem. Nevertheless, appropriate histoautoradiographs as well as auxiliary experiments indicated that the ascending of Ca primarily occurs in the xylem. © 1979, Taylor & Francis Group, LLC. All rights reserved.