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Selectivity and Ion Transport in Excised Bean Hypocotyls
Author(s) -
Waisel Y.,
Neumann Ruth,
Kuller Z.
Publication year - 1970
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1970.tb06493.x
Subject(s) - hypocotyl , selectivity , chemistry , biophysics , adsorption , ion transporter , ion , diffusion , biochemistry , botany , biology , organic chemistry , catalysis , physics , thermodynamics
Ion transport and ion selectivity in bean hypocotyl slices were investigated. The transport mechanism is practically independent of temperature and in short term experiments appears to be non‐metabolic. Selectivity may be attributed either to specific adsorption sites or to the properties of the diffusion barrier. The fact that with a physical transport mechanism selectivity is observed only under physiological temperature conditions hints that a flexible barrier (plasmalemma?) rather than fixed adsorption sites should be regarded as governing the process.