The three-dimensional (3D) organization of chromosomes of Crepis capillaris (2n = 6) has been investigated. Root tips were fixed, macerated with enzymes and gently separated without squashing. The cells were then stained with DAPI and optically sectioned under computer control. Sections were stored as video images and processed to remove noise and out-of-focus information. Computer modelling wa...

EVERAL studies have now demonstrated that postirradiation oxygen treatS ments can markedly increase the initial X-ray damage in barley seeds (ADAMS, NILAN AND GUNTHARDT 1955; NILAN 1955; ADAMS AND NILAN 1958; CALDECOTT et al. 1957; CURTIS, CALDECOTT AND KONZAK 1957). One of the more striking of these after effects is the marked increase in the frequencies of chromosome aberrations (ADAMS, NILAN...

By JASON A. DUAN Institute of Statistics and Decision Sciences at Duke University, Durham, North Carolina, 27708-0251, U.S.A. [email protected] MICHELE GUINDANI Istituto di Metodi Quantitativi, Università Bocconi, 20136, Milano, Italy [email protected] and ALAN E. GELFAND Institute of Statistics and Decision Sciences at Duke University, Durham, North Carolina, 27708-0251, U.S.A. ...

the aim of this study was to evaluate and compare the sensitivity of plant bioassays:tradescantia-micronucleus (trad-mcn) tests using bnl 02 and 4430 clones, and crepis capillaris hairyroots chromosome aberrations test. the evaluation of the sensitivity of the tests was based on the example of the analysis of the genotoxicity of water samples from two natural water reservoirs in poland: the raw...

Irano-Turanian floristic region in Turkey appears to be the center of origin Crepis foetida subsp. rhoeadiflolia (Asteraceae). In this study, karyotype and flow cytometric analyses six populations C. were performed. The cytogenetic characteristics using multivariate (cluster analysis, principal components analysis) evaluated a cytogeographic context. Two main groups are found based on among dis...