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CL−-Fluxe, Akkumulation und Transport in abgeschnittenen Mais-Wurzeln

Fluxes, accumulation and transport of Cl- in excised corn roots

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Summary

Fluxes, accumulation and transport rates of Cl- in excised corn roots were investigated.

Flux equilibrium in 5×10-4M KCl was not reached within an experimental period of 28 hr.

Transport of Cl- (5×10-4M KCl) through the xylem of 4–6 cm long excised corn roots had a lag of 1–2 hr. From 6 to 28 hr rates of accumulation and transport were nearly constant (5×10-4M KCl). The velocity of volume-flow within the xylem was 1.5–2 cm hr-1 (5×10-4M KCl).

36Cl--efflux through the cut end of roots preloaded in K36Cl of low concentration exhibits a discontinuity which is explained by addition of two fluxes: efflux of ions concentrated in the xylem (and symplasm) plus efflux from the vacuoles through the xylem.

Accumulation of Cl- by excised roots approaches a maximum level (Jackson and Edwards, 1966). Influx rates remain constant while efflux rates increase with time. It is shown in this paper that the flux of Cl- through the xylem becomes a large proportion of the influx across the plasmalemma. Flux rates suggest that more than 50% of the Cl- ions transported to the xylem passed through a vacuole (5×10-4M KCl; 20–28 hr).

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Literatur

  • Evans, E. C., Vaughan, B. E.: Wounding response in relation to polar transport of radiocalcium in isolated root segments of Zea mays. Plant Physiol. 41, 1145–1151 (1966).

    Google Scholar 

  • Jackson, P. C., Edwards, D. G.: Cation effects on chloride fluxes and accumulation levels in Barley roots. J. gen. Physiol. 50, 225–241 (1966).

    Google Scholar 

  • Nissen, P.: Uptake of sulfate by roots and leaf slices of Barley: Mediated by single, multiphasic mechanisms. Physiol. Plantarum (Copenh.), 24, 315–324 (1971).

    Google Scholar 

  • Pallaghy, C. K., Lüttge, U., Willert, K. v.: Cytoplasmic compartmentation and parallel pathways of ion uptake in plant root cells. Z. Pflanzenphysiol. 62, 51–57 (1970).

    Google Scholar 

  • Pitman, M. G.: The determination of the salt relations of the cytoplasmic phase in cells of beet root tissue. Aust. J. biol. Sci. 16, 647–668 (1963).

    Google Scholar 

  • Pitman, M. G.: Persönliche Mittellung (1971).

  • Weigl, J.: Austausch-Mechanismus des Ionentransports in Pflanzen am Beispiel des Phosphat- und Chloridtransports bei Maiswurzeln. Planta (Berl.) 79, 197–207 (1968).

    Google Scholar 

  • —: Efflux und Transport von Cl- und Rb+ in Maiswurzeln. Planta (Berl.) 84, 311–323 (1969).

    Google Scholar 

  • —: Die Wirkung hoher Salzkonzentration auf die Permeabilität der pflanzlichen Zellmembran. Z. Naturforsch. 25b, 96–100 (1970).

    Google Scholar 

  • —: Diskontinuität des polaren Ionen-Efflux durch das Xylem abgeschnittener Maiswurzeln. Z. Pflanzenphysiol. 64, 77–79 (1971).

    Google Scholar 

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Authors and Affiliations

  1. Botanisches Institut der Technischen Hochschule Darmstadt, Darmstadt, Deutschland

    Josef Weigl

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  1. Josef Weigl
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Weigl, J. CL−-Fluxe, Akkumulation und Transport in abgeschnittenen Mais-Wurzeln. Planta 98, 315–322 (1971). https://doi.org/10.1007/BF00380232

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  • DOI: https://doi.org/10.1007/BF00380232

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