Abstract
WHILE studying the polarity of the Fucales egg, I observed in 1951 that isolated receptacles of Pelvetia fastigiata could usually be stimulated to discharge gametangia by exposure to a brief period of darkness following a longer period of illumination. Thenceforth, gametes of Pelvetia have been obtained routinely by this means. It was further observed, especially at lower temperatures, that the shedding stimulus was sometimes transmitted from one region of a receptacle to another. Since no similar observations on algae have been published, and since the Fucales egg is an attractive object for embryological investigation, a brief report may be of interest.
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JAFFE, L. Stimulation of the Discharge of Gametangia from a Brown Alga by a Change from Light to Darkness. Nature 174, 743 (1954). https://doi.org/10.1038/174743a0
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DOI: https://doi.org/10.1038/174743a0
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