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The Delivery of Salts to the Xylem. Three Types of Anion Conductance in the Plasmalemma of the Xylem Parenchyma of Roots of Barley1

Authors
Publisher
American Society of Plant Physiologists
Publication Date
Source
PMC
Keywords
  • Research Article
Disciplines
  • Biology

Abstract

The Delivery of Salts to the Xylem. Three Types of Anion Conductance in the Plasmalemma of the Xylem Parenchyma of Roots of Barley by Barbara Köhler, and Klaus Raschke Plantphysiol Volume 122(1):243-254 January 1, 2000 ©2000 by American Society of Plant Biologists Example of single-channel recordings of X-IRAC in the whole-cell configuration (from one protoplast out of seven). Köhler B, Raschke K. Plantphysiol 2000;122:243-254 ©2000 by American Society of Plant Biologists Current-voltage relationship of X-IRAC. Köhler B, Raschke K. Plantphysiol 2000;122:243-254 ©2000 by American Society of Plant Biologists Channel activity (nP) per unit membrane area (A) of X-IRAC with low-Ca2+solution (0.15μm) (A) and high-Ca2+ solution (5 μm) (B) in the pipette.; in the bath was the standard solution (see “Materials and Methods”). Köhler B, Raschke K. Plantphysiol 2000;122:243-254 ©2000 by American Society of Plant Biologists Current responses of X-IRAC to voltage ramps of 50-ms duration (inset), showing that replacement of external Cl− by NO3 − had no effect. Köhler B, Raschke K. Plantphysiol 2000;122:243-254 ©2000 by American Society of Plant Biologists Activation and current-voltage relationship of X-QUAC. Köhler B, Raschke K. Plantphysiol 2000;122:243-254 ©2000 by American Society of Plant Biologists X-QUAC, tail-current experiments. Köhler B, Raschke K. Plantphysiol 2000;122:243-254 ©2000 by American Society of Plant Biologists A, Current-voltage relationships of X-QUAC for three different anions in the external solution, Cl−(▪), NO3 − (●), and malate2−(○). Köhler B, Raschke K. Plantphysiol 2000;122:243-254 ©2000 by American Society of Plant Biologists A, Deactivation of X-SLAC recorded while running the voltage protocol shown in the inset; between pulses, the voltage was clamped to 37 mV for 60 s each. Köhler B, Raschke K. Plantphysiol 2000;122:243-254 ©2000 by American Society of Plant Biologists No activation of X-SLAC at hyperpolarization. Köhler B, Raschke K. Plantphy

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