Summary
An autoradiographic study of the rooted shoots of Tradescantia viridis (=T. albiflora Kunth emend. Brueckn.) showed a high speed translocation of 86Rb applied to a leaf for short periods of time (5 to 2.5 min).
The speed of this translocation (between 840 and 1.440 cm h-1) speaks for the existence of a very rapid phloem component translocating ions to an active sink, represented here by the growing roots.
Pretreatment with cycloheximide (48 h, 50 mg l-1) decreases the quantity of this long distance transport but not the velocity.
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Abbreviations
- FD:
-
leuille donatrice
- CHM:
-
cycloheximide
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Penot, M. Mise en évidence de déplacements de 86Rb à grande vitesse, dans le phloème de Tradescantia viridis . Planta 132, 183–187 (1976). https://doi.org/10.1007/BF00388901
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DOI: https://doi.org/10.1007/BF00388901