Summary
The honey dew of aphids feeding on the horizontally fixed stem of a Vicia faba plant was collected on a turning table. When the leaf below the pierced stem was provided with fluorescein, and the leaf above with a 14C-compound, the honey dew mostly contained both tracers. It could be shown that the attractive force of a single aphid is not strong enough to change the direction of transport. The tracers must have moved bidirectional in the same bundle and joined each other in the sieve tube before it was pierced by the aphid. There exists either a bidirectional movement in the single sieve tube, or the tracers move side by side in a “homodromous loop-path”.
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Literatur
Biddulph, O., and R. Cory: Demonstration of two translocation mechanisms in studies of bidirectional movement. Plant Physiol. 35, 689–695 (1960).
——: Translocation of 14C metabolites in the phloem of the bean plant. Plant Physiol. 40, 119–129 (1965).
—, and J. Markle: Translocation of radiophosphorus in the phloem of the cotton plant. Amer. J. Bot. 31, 65–70 (1944).
Chen, S. L.: Simultaneous movement of 32P and 14C in opposite directions in phloem tissue. Amer. J. Bot. 38, 203–211 (1951).
Eschrich, W.: Translokation 14C-markierter Assimilate im Licht und im Dunkeln bei Vicia faba. Planta (Berl.) 70, 99–124 (1966).
— H. B. Currier, S. Yamaguchi u. R. B. McNairn: Der Einfluß verstärkter Callosebildung auf den Stofftransport in Siebröhren. Planta (Berl.) 65, 49–64 (1965).
Mason, T. G., E. J. Maskell, and E. Phillis: Further studies on transport in the cotton plant. III. Concerning the independence of solute movement in the phloem. Ann. Bot. 50, 23–58 (1936).
—, and E. Phillis: The migration of solutes. Bot. Review 3, 47–71 (1937).
Resch, A.: Über Leptombündel und isolierte Siebröhren sowie deren Korrelationen zu den übrigen Leitungsbahnen in der Sproßachse. I. Teil. Planta (Berl.) 52, 467–489 (1959)
Schumacher, W.: Untersuchungen über die Wanderung des Fluoresceins in den Siebröhren. Jb. wiss. Bot. 77, 685–732 (1933).
Willenbrink, J.: Über die Hemmung des Stofftransports in den Siebröhren durch lokale Inaktivierung verschiedener Atmungsenzyme. Planta (Berl.) 48, 269–342 (1957)
—: Zur lokalen Hemmung des Assimilattransports durch Blausäure. Z. Pflanzenphysiol. 55, 119–130 (1966).
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Mit Unterstützung der Deutschen Forschungsgemeinschaft.
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Eschrich, W. Bidirektionelle Translokation in Siebröhren. Planta 73, 37–49 (1967). https://doi.org/10.1007/BF00419839
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DOI: https://doi.org/10.1007/BF00419839