Inhibitory Effects of the Corpora Cardiaca and of the Corpus Allatum in Drosophila


THE function of the corpora cardiaca in Diptera is, at present, obscure. According to unpublished data of M. Thomson (cit. by E. Thomsen1), an extract of the corpus cardiacum of the blowfly (Calli-phora), when injected into blinded shrimps (Leander) with maximally expanded chromatophores causes a strong contraction of the red and black pigment. Whether the corpus cardiacum acts similarly on the pigment cells in Diptera is unknown. Two other effects of the corpora cardiaca, obtained in transplantation experiments on Drosophila hydei, will be reported here.

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  1. 1

    Thomsen, E., Videnskab. Meddel. Dansk Naturhist. Foreng., 106 (1942).

  2. 2

    Scharrer, B., and Hadorn, E., Proc. U.S. Nat. Acad. Sci., 21 (1938).

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    Vogt, M., Roux's Arch., 142 (1942).

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    Schrader, K., Biol. Zblt., 53 (1938).

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    Vogt, M., Biol. Zblt., 63 (1943).

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VOGT, M. Inhibitory Effects of the Corpora Cardiaca and of the Corpus Allatum in Drosophila. Nature 157, 512 (1946).

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