Fig. 1. FISH images of A. thaliana cell cultures probed with 180 bp repetitive sequence (A-H) and with Athila (G,H). Chromosomes and nuclei were counterstained with DAPI (blue). The 180 bp repetitive sequences are shown in red (A-F) or green (G,H) and Athila as red (G,H). A-F show the following features: (A) the smallest chromosome found (arrow) and the stretched end of SAT-chromosome (arrowhead); (B) a ring-shaped chromosome (arrow); (C) a putative dicentric chromosome with two distinct 180 bp signals (arrow); (D) two chromosomes with two distinct and minor multiple 180 bp signals (arrows); (E) chromosomes carrying very small amounts of 180 bp repeats (arrows); (F) the same metaphase cell as in E showing only the 180 bp signals (enhanced to be visualized clearly). (G,H) A prometaphase (G) and an interphase (H) cell, probed with 180 bp repeats (green) and with Athila (red). Scale bars: 5 µm.