Abstract
IT has been shown that for ‘seeds’ (achenes) of Betula pubescens a much higher percentage germination is obtained in long days than in short days (approximately 90 and 25 per cent respectively)1. The effect of light is presumably on the living tissue of the embryo; but it has been found that excised embryos germinate even in complete darkness.
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References
Black, M., and Wareing, P. F., Physiol. Plant., 8, 300 (1955).
Crocker, W., “The Growth of Plants” (New York, 1948).
Wareing, P. F., and Foda, H., Nature [p. 908 of this issue].
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BLACK, M. Interrelationships of Germination Inhibitors and Oxygen in the Dormancy of Seed of Betula . Nature 178, 924–925 (1956). https://doi.org/10.1038/178924a0
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DOI: https://doi.org/10.1038/178924a0
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