title: Effects of ozone on meiotic chromosomes of Vicia faba.
abstract: All of the levels of ozone used in these experiments caused morphological damage to plants of Vicia faba L., but only the dose of 200 parts per hundred million for 4 h or 8 h caused chromosomal damage in the microsporocytes. Significant chromosomal damage appeared 24 h after fumigation in metaphase I and anaphase I - telophase I but no significant damage was found in anaphase II - telophase II. This observation suggests that chromosomes are more susceptible to ozone during early stages of meiosis than at later stages. Chromosomal damage was of two types: physiological, as suggested by chromosome stickiness and physical, as indicated by bridges, fragments, and micronuclei.
mesh_terms: D000393:Air Pollutants / Q000494:pharmacology*; D002869:Chromosome Aberrations; D002875:Chromosomes / Q000187:drug effects*; D008540:Meiosis / Q000187:drug effects; D010126:Ozone / Q000494:pharmacology*; D010944:Plants / Q000187:drug effects* / Q000648:ultrastructure
chemical_list: D000393:Air Pollutants; D010126:Ozone