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The Effect of Histones and Other Basic Macromolecules on Cell Permeability and Elongation of Barley Roots
Author(s) -
Drew M. C.,
McLaren A. D.
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.tb06446.x
Subject(s) - elongation , divalent , biophysics , calcium , lysozyme , histone , chemistry , biochemistry , macromolecule , permeability (electromagnetism) , ultraviolet light , biology , photochemistry , organic chemistry , dna , materials science , membrane , metallurgy , ultimate tensile strength
Low exogenous concentrations of calf‐thymus histone, poly‐ l ‐lysine and lysozyme inhibit root elongation. These basic macromolecules (polycations) also affect cell permeability resulting in a leakage of ultraviolet light (UV)‐absorbing materials and chloride ion from cells. Adenosine 5′‐monophosphate was identified as one of the UV‐absorbing compounds in the root exudate, by thin layer chromatography. These deleterious effects of polycations on root growth and permeability are reduced in the presence of calcium and other divalent cations. Calcium ion‐histone interaction appears to exhibit competitive kinetics and suggests that both calcium and histone compete for attachment to negative sites on cell membrances.