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Polar Movement of Ions in Barley Roots

Polar Movement of Ions in Barley Roots The movement of Na+, Rb+, Ca2+, Cl−, and THO was investigated in excised roots of six‐day‐old barley plants containing different initial salt contents. Ions applied at any point of a root segment, 12 cm long, moved strictly towards the base of the root. The polar movement was maintained even after removing different lengths of the apex and applying ions to the central zone of the remaining segment. Ions applied to either cut end also showed the same polar movement. The polar movement of ions was unaffected by the initial salt status. Tritiated water applied to the central zone of the segment moved in both the apical and basal direction. The ion movement was not correlated with the water movement. No current hypothesis of ion transport satisfactorily explains the observed polar movement. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physiologia Plantarum Wiley

Polar Movement of Ions in Barley Roots

SINGH, CHANCHAL; JACOBSON, LOUIS
Physiologia Plantarum , Volume 39 (1) – Jan 1, 1977
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References (21)

Publisher
Wiley
Copyright
1977 Physiologia Plantarum
ISSN
0031-9317
eISSN
1399-3054
DOI
10.1111/j.1399-3054.1977.tb09287.x
Publisher site
See Article on Publisher Site

Abstract

The movement of Na+, Rb+, Ca2+, Cl−, and THO was investigated in excised roots of six‐day‐old barley plants containing different initial salt contents. Ions applied at any point of a root segment, 12 cm long, moved strictly towards the base of the root. The polar movement was maintained even after removing different lengths of the apex and applying ions to the central zone of the remaining segment. Ions applied to either cut end also showed the same polar movement. The polar movement of ions was unaffected by the initial salt status. Tritiated water applied to the central zone of the segment moved in both the apical and basal direction. The ion movement was not correlated with the water movement. No current hypothesis of ion transport satisfactorily explains the observed polar movement.

Journal

Physiologia Plantarum – Wiley

Published: Jan 1, 1977

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