Electro-Osmotic and Biopotential Measurements on Phloem Strands of Nymphoides

Electro-Osmotic and Biopotential Measurements on Phloem Strands of Nymphoides

Electroosmotic measurements on the excised vascular strand from the petiole of the water plant Nymphoides peltatum have been carried out, and the Onsager coefficients obtained. About 120 water molecules per ion are carried electroosmotically when the strand is in 10-4 M KCl, about 30 in 10-1 M KCl....

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Veröffentlicht in:Planta 1969-12, Vol.88 (4), p.321-331
Hauptverfasser: Fensom, D. S., Spanner, Douglas C.
Format: Artikel
Sprache:eng
Schlagworte:
Coefficients
Electrodes
Flow velocity
Ions
Petioles
Phloem
Sieve plates
Sieve tubes
Solar fibrils
Xylem
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Zusammenfassung:Electroosmotic measurements on the excised vascular strand from the petiole of the water plant Nymphoides peltatum have been carried out, and the Onsager coefficients obtained. About 120 water molecules per ion are carried electroosmotically when the strand is in 10-4 M KCl, about 30 in 10-1 M KCl. Potential measurements made on an intact and functioning petiole are discussed in the light of the pressure-flow and electroosmotic theories of translocation.
ISSN:0032-0935
1432-2048
DOI:10.1007/BF00387460