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STRUCTURAL CHANGES OCCURRING IN NUCLEI OF BARLEY ROOT CELLS IN RESPONSE TO A COMBINED EFFECT OF SALINITY AND AGEING
Author(s) -
Werker E.,
Weimberg Lerner R.,
PoljakoffMayber A.
Publication year - 1983
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.1537-2197.1983.tb07862.x
Subject(s) - hordeum vulgare , biology , biophysics , hordeum , ribosome , ageing , salinity , ultrastructure , mitochondrion , botany , prophase , chromatin , cytosol , electron microscope , microbiology and biotechnology , biochemistry , poaceae , meiosis , rna , genetics , dna , enzyme , ecology , gene , physics , optics
Electron microscopic observations of epidermal and cortical cells of the root tips of barley ( Hordeum vulgare L.) grown in 192 mm NaCl and aged in 192 mm NaCl + 0.2 mm CaSO 4 revealed marked condensation of chromatin in the nuclei which was not observed in freshly cut tissue grown in the presence of 192 mM NaCl. Other changes due to salinity were observed, such as the increase of the number of ribosomes and of mitochondria and the appearance of translucent areas in slightly swollen mitochondria. The mechanism by which the nuclear changes occurred or their meaning for cell function are not understood.