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Rubidium and Potassium Absorption by Bean‐leaf Slices Compared to Sodium Absorption
Author(s) -
JACOBY B.,
ABAS S.,
STEINITZ B.
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.tb01177.x
Subject(s) - phaseolus , potassium , rubidium , absorption (acoustics) , sodium , chemistry , absorption capacity , salt (chemistry) , botany , horticulture , biology , materials science , organic chemistry , chemical engineering , engineering , composite material
At salt concentrations of 0.1 m M as well as of 5.0 m M , the 22 Na + absorption capacity of bean ( Phaseolus vulgaris L. cv. ‘Brittle Wax’) leaf tissue increased during the period of leaf expansion and decreased rapidly after leaf maturation. The absorption capacity for 86 Rb + and 42 K + was highest in very young leaves and decreased continuously in expanding and in mature leaves. The 86 Rb + absorption capacity of mature leaves was not increased by detopping the plants; this senescence‐retarding treatment more than doubled 2 Na + absorption. The absorption of 22 Na + by bean‐leaf slices was not enhanced by light, whereas 86 Rb + and 42 K + absorption was much affected. Previously absorbed 86 Rb + and 42 K + were more available for exchange than 22 Na + .