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Kinetics of Ion Uptake in Higher Plants
Author(s) -
NISSEN PER
Publication year - 1973
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.1399-3054.1973.tb01160.x
Subject(s) - vacuole , limiting , biophysics , diffusion , salt (chemistry) , kinetics , chemistry , ion , botany , biochemistry , biology , cytoplasm , physics , thermodynamics , mechanical engineering , organic chemistry , quantum mechanics , engineering
Single, multiphasic mechanisms located in the plasmalemma and the tonoplast are proposed to mediate ion uptake in cells of higher plants. There are no parallel uptake mechanisms and, normally, little or no free diffusion across the plasmalemma. The plasmalemma controls the rate of uptake at low external salt concentrations, while the tonoplast may become rate‐limiting at high concentrations.