Summary
Longitudinal strips from leaf blades of Zea mays L., with veins continuous along their whole length, proved to be a very uniform and convenient material for translocation experiments. Under normal photosynthetic conditions a very strong basipetal assimilate movement was shown. In the dark this movement persisted as long as starch reserves were available. Parts of the strips exposed to darkness or to CO2-free air, i.e. nonphotosynthetic conditions, became strong sinks which attracted assimilates, darkness having the strongest effect. Microradioautographs showed that transport of assimilates took place in the sieve tubes of the phloem.
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References
Crafts, A. S., Crisp, C. E.: Phloem transport in plants. San Francisco: Freeman 1971
Eschrich, W.: Translokation 14C-markierter Assimilate im Licht und im Dunkeln bei Vicia faba. Planta (Berl.) 70, 99–124 (1966)
Eschrich, W., Evert, R. F., Young, J. H.: Solution flow in tubular semipermeable membranes. Planta (Berl.) 107, 279–300 (1972)
Eschrich, W., Fritz, E.: Microautoradiography of water-soluble organic compounds. In: Microautoradiography and electron probe analysis: Their application to plant physiology, p. 100–122, U. Lüttge, ed. Berlin-Heidelberg-New York: Springer 1972
Fritz, E., Eschrich, W.: 14C-Mikroautoradiographie, wasserlöslicher Substanzen im Phloem. Planta (Berl.) 92, 267–281 (1970)
Hartt, C. E., Kortschak, H. P.: Sugar gradients and translocation of sucrose in detached blades of sugarcane. Plant Physiol. 39, 460–474 (1964)
Hartt, C. E.: Translocation in colored light. Plant Physiol. 41, 369–372 (1966)
Hartt, C. E.: Mechanism of translocation in sugarcane. Harold L. Lyon Arboret. Lect. No. 4, Univ. of Hawaii, Honululu 1973
Lüttge, U.: Stofftransport der Pflanzen. Berlin-Heidelberg-New York: Springer 1973
Plaut, Z., Reinhold, L.: Concomitant photosynthesis implicated in the light effect on translocation in bean plants. Aust. J. biol. Sci. 22, 1105–1111 (1969)
Vieweg, G. G., de Fekete, M. A. R.: Regulation des Stoffwechsels der Stärke in Blättern von Zea mays. Ber. dtsch. bot. Ges. 86, 233–239 (1973)
Young, J. H., Evert, R. F., Eschrich, W.: On the volume-flow mechanism of phloem transprot. Planta (Berl.) 113, 355–366 (1973)
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Heyser, W., Leonard, O., Heyser, R. et al. The influence of light, darkness, and lack of CO2 on phloem translocation in detached maize leaves. Planta 122, 143–154 (1975). https://doi.org/10.1007/BF00388654
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DOI: https://doi.org/10.1007/BF00388654