✦ LIBER ✦

Sodium-coupled solute transport in charophyte algae: A general mechanism for transport energization in plant cells?

✍ Scribed by N. Alan Walker; Dale Sanders

Book ID: 104660895
Publisher: Springer-Verlag
Year: 1991
Tongue: English
Weight: 306 KB
Volume: 185
Category: Article
ISSN: 0032-0935
DOI: 10.1007/bf00201070

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✦ Synopsis

Ion-gradient-coupled transport systems in plants are normally electrophoretic and carry inward current. Rapid inward electrical currents elicited by K +, by urea and by lysine in the freshwater acidophilic alga Nitella translucens Agh. are all very strongly dependent on the presence ofNa + or (except in the case of K +) Li +. These results indicate that Na +-coupled solute transport in plants, which had previously been demonstrated only in an alkalophilic species (Chara australis), did not evolve recently as an alternative to H +-coupled transport in high-pH environments, and might therefore be more widely distributed than has hitherto been recognised.

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