title: Studies on the biological effect of fast neutrons. II. Variation of total nucleic acid content and ultrastructure in barley leaves vs. dose.
abstract: The effect of fast neutrons on the ultrastructure and nucleic acid content of leaves of barley seedlings was studied. Irradiation led to chloroplast degeneration. The walls of the cells containing degenerated plastides were abnormally thickened. Irradiation reduced the water content of the leaves. Variations in the RNA and DNA content of the leaves, expressed on a dry weight basis, could not be written as a simple function of the dose. Their content have a minimum at the semi-lethal dose.
mesh_terms: D002736:Chloroplasts / Q000528:radiation effects / Q000648:ultrastructure; D004247:DNA / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D005214:Fast Neutrons; D001467:Hordeum / Q000528:radiation effects / Q000648:ultrastructure; D009502:Neutrons; D010944:Plants / Q000528:radiation effects* / Q000648:ultrastructure; D012313:RNA / Q000528:radiation effects*
chemical_list: D012313:RNA; D004247:DNA