Abstract
SINCE the pioneering researches of Wigglesworth1 the corpora allata have been known as the source of a ‘juvenile hormone’ which opposes or prevents the metamorphosis of immature insects. The presence of this hormone exerts a biochemical restraint on the cellular transformations responsible for the metamorphosis of the insect as a whole. These facts have been ascertained by biological procedures such as parabiosis and the transplantation of living corpora allata2. The hormone itself has apparently not been extracted or obtained apart from the living insect or endocrine organ.
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References
Wigglesworth, V. B., Quart. J. Micro. Sci., 79, 91 (1936).
Wigglesworth, V. B., “The Physiology of Insect Metamorphosis” (Cambridge Univ. Press, 1954).
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WILLIAMS, C. The Juvenile Hormone of Insects. Nature 178, 212–213 (1956). https://doi.org/10.1038/178212b0
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DOI: https://doi.org/10.1038/178212b0
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