title: Cytological events in explants of Arabidopsis thaliana during early callogenesis.
abstract: Leaf explants of diploid (2n = 2x = 10) and autotetraploid (2n = 4x = 20) plants of Arabidopsis thaliana ecotype Columbia were cytologically and cytogenetically analysed to determine the time and the mechanisms of the process of polyploidization. The first polyploid cells were observed after the third day of culture in both genotypes of explants. Polyploid cells were the result of pre-existing mixoploidy in explants of A. thaliana. Other factors such as endoreduplication, endomitosis, abnormal microtubules arrangement and DNA damage may have induced polyploidization during early stages of callogenesis.
authors.affiliation: Department of Plant Anatomy and Cytology, University of Silesia, Jagiellonska 28, 40-032 Katowice, Poland. alicja.fras@us.edu.pl
authors.forename: A
authors.initials: A
authors.lastname: Fras
authors.forename: J
authors.initials: J
authors.lastname: Juchimiuk
authors.forename: D
authors.initials: D
authors.lastname: Siwinska
authors.forename: J
authors.initials: J
authors.lastname: Maluszynska
mesh_terms: D017360:Arabidopsis / Q000166:cytology / Q000254:growth & development / Q000502:physiology*; D029681:Arabidopsis Proteins / Q000378:metabolism; D002478:Cells, Cultured; D032461:Chromosomes, Plant / Q000502:physiology; D004249:DNA Damage; D008870:Microtubules / Q000502:physiology; D018515:Plant Leaves / Q000166:cytology / Q000254:growth & development; D011123:Polyploidy
chemical_list: D029681:Arabidopsis Proteins