Summary
After application of D-glucose-6-T to small areas of leaf surfaces of Cucurbita, radioactivity — mainly sucrose-T — could exclusively be localized by histoautoradiography (“dry-technique”) within single sieve tubes of exporting bundles. The centre of activity corresponded to the “slime”-plugs (in crosssection-autoradiograms) of the sieve tubes and to the sieve plates (in longitudinal sections). It is concluded that only the sieve tubes are the conducting channels for the long-distance transport of those substances which are labeled with tritium in these experiments.
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Schmitz, K., Willenbrink, J. Zum Nachweis tritiierter Assimilate in den Siebröhren von Cucurbita . Planta 83, 111–114 (1968). https://doi.org/10.1007/BF00385139
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DOI: https://doi.org/10.1007/BF00385139