Abstract
IN the course of our work on growth-promoting substances, we have cultured many different kinds of pollen tubes as test subjects during the last two years. We discovered a very unusual kind of nucleus in the tube of Hymenocallis tubiflora. The germinal nucleus is naturally pigmented and is of a reddishbrown colour. This was particularly fortunate for us because it permitted us to follow changes in form and position of the nucleus in the various stages of germination, from the time that the grains were sown, up to the time when the well-developed tube burst at the tip and the nucleus emerged and came to lie free on the surface of the culture medium. The favourable colour made it easy to photograph the nucleus in different phases while it was alive.
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BECK, W., JOLY, R. A Pigmented Nucleus. Nature 145, 226 (1940). https://doi.org/10.1038/145226b0
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DOI: https://doi.org/10.1038/145226b0
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