Abstract
IN a recent communication, Asprey et al. 1 report that spraying with indolylacetic acid and gibberellin effects elongation of the setæ of Pellia epiphylla in January, whereas under normal conditions this is delayed until late February or early March. We have obtained results which suggest that during the winter months a gradual change occurs, bringing setæ into a condition when they are capable of rapid elongation once the temperature is raised. In view of the results of Asprey et al., this internal change may well be correlated with synthesis of growth hormones.
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References
Asprey, G. F., Benson-Evans, K., and Lyon, A. G., Nature, 181, 1351 (1958).
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CROMBLE, W., PATON, J. An Age Effect on Seta Elongation in Pellia epiphylla . Nature 182, 541 (1958). https://doi.org/10.1038/182541a0
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DOI: https://doi.org/10.1038/182541a0
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