Abstract
THE rate of termination of diapause in eggs of Acheta commodus (Walk) has a negative temperature coefficient within the range −16.5 to +5° C.1. It has been reported by Jacobsen and Christensen2 that the initial stages of denaturation of β-lactoglobulin by urea has a negative temperature coefficient. Accordingly, experiments have been carried out with certain denaturants, primarily urea, for evidence of any effect on diapause. The attempt was made to incorporate the chemicals into the eggs by making use of the capacity of Orthopteran eggs to take up water during their development. In Acheta the uptake of water occurs slightly later than the onset of diapause3.
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References
Hogan, T. W., Aust. J. Biol. Sci., 13, 527 (1960).
Jacobsen, C. F., and Christensen, L. K., Nature, 161, 30 (1948).
Hogan, T. W., Aust. J. Biol. Sci. 13, 14 (1960).
Jensen, E. V., Science, 130, 1319 (1959).
Klotz, I. M., Science, 128, 815 (1958).
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HOGAN, T. Termination of Diapause in Acheta by Urea. Nature 190, 367–368 (1961). https://doi.org/10.1038/190367b0
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DOI: https://doi.org/10.1038/190367b0
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