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BINDING SITES FOR INORGANIC IONS AND UREA ON ISOLATED CUTICULAR MEMBRANE SURFACES
Author(s) -
Yamada Y.,
Rasmussen H. P.,
Bukovac M. J.,
Wittwer S. H.
Publication year - 1966
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1966.tb07317.x
Subject(s) - urea , calcium , cuticle (hair) , chloride , biophysics , membrane , biology , cell wall , ion , inorganic ions , binding site , botany , biochemistry , chemistry , anatomy , organic chemistry
Binding sites for calcium and chloride ions, and urea on cuticular membrane surfaces were identified by microautoradiography. There was no localization of binding on either the smooth outer or irregular inner surfaces of the astomatous tomato fruit cuticle, and urea was bound to a lesser degree than inorganic ions. Calcium and chloride binding sites on surfaces of green onion leaf cuticles were closely associated with stomatal pores and above the periclinal cell walls. Binding of calcium was more pronounced than of chloride. These results are discussed in light of possible sites of entry for foliar applied nutrients.