Abstract
DIVIDING nuclei in the apical groove of Halidrys siliquosa show large numbers of small chromosomes, and at metaphase more than 55 have been counted (Fig. 1c, d, e). Metaphase plates at the first three divisions in developing antheridia have given counts of the order of 30 chromosomes (Fig. 1b), and one at the first division of the oogonium of approximately 28 chromosomes. This indicates that the thallus of H. siliquosa is diploid with meiosis at the first division of the gametangia, as is usual in the Fucales1.
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NAYLOR, M. Chromosomes and Chromocentres in the Nuclei of Halidrys siliquosa (L.) Lyngb.. Nature 181, 853 (1958). https://doi.org/10.1038/181853a0
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DOI: https://doi.org/10.1038/181853a0
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