Abstract
Root tip cells of broad bean (Vicia faba L. cv. ‘Wase soramame’) and barley (Hordeum vulgare L. cv. ‘Minorimugi’) were immunostained with antibodies specific for acetylated histone H4. With an antiserum that recognizes histone H4 acetylated at lysine-5, the nucleolar organizing region (NOR) in mitotic chromosomes was strongly labeled in both species. The broad bean had two signals in the metaphase and telophase chromosome complements and four signals in the prophase and anaphase chromosome complements, while the barley had four signals in the metaphase and telophase chromosome complements and eight signals in the prophase and anaphase complements. Five differnet patterns of signals were observed at interphase: in type I only nucleoli were wholly stained; in type II perinucleolar knob-like signals and/or fiber-like signals emanated from the nucleus; in type III aggregate signals appeared in the nucleolus in type IV many small dot-like signals were distributed throughout the nucleus, except nucleoli; and in type V string-like or some granule-like signals appeared in the nucleoli. Type II was very similar to previous results by in situ hybridization with sense rDNA probes. Type III was similar to the patterns of DNA synthesis recognized as chromatin domains by anti-BrdU antibodies. Type V was very similar to the results of in situ hybridization with pTa71, rDNA probes and the appearance of the dense fibrillar components of the nucleolus.
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Idei, S., Kondo, K., Turner, B.M. et al. Tomographic distribution of acetylated histone H4 in plant chromosomes, nuclei and nucleoli. Chromosoma 105, 293–302 (1996). https://doi.org/10.1007/BF02524647
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DOI: https://doi.org/10.1007/BF02524647