Premium
Comparison of Compartmental Analysis for Rb+ and Na+ in Low‐ and High‐Salt Barley Roots
Author(s) -
BANGE G.
Publication year - 1979
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.1399-3054.1979.tb06554.x
Subject(s) - hordeum vulgare , salt (chemistry) , chemistry , hordeum , vacuole , kinetics , cytoplasm , flux (metallurgy) , phase (matter) , botany , poaceae , biophysics , biochemistry , biology , physics , organic chemistry , quantum mechanics
Abstract The size of the cytoplasmic pools of Rb + and Na + in roots of barley ( Hordeum vulgare L.) was estimated by two independent methods:1 . from the time curves of net Rb + and Na + uptake in low‐salt roots; 2 . from the kinetics of ion exchange in Rb + ‐and Na + ‐saturated roots.The results indicate that in low‐salt roots there is a lag‐phase in vacuolar accumulation of Rb + but probably not of Na + . At the same time part of the cytoplasmic Na + pool seems to be excluded from rapid exchange. Both for Rb + and Na + , flux reduction in saturated tissue appears to be more pronounced at the tonoplast than at the plasmalemma.