Abstract
RECENT papers by Guttridge1,2 have provided evidence that photo-periodically controlled growth responses in the strawberry may be regulated by a hormone, produced in long days, which promotes vegetative growth and inhibits flower initiation ; and that gibberellic acid may simulate the action of this hormone in plants growing under short-day conditions3. Brian and Hemming4 found that plants of Pisum sativum var. Meteor will respond by increased length of internode to as little as 0.01 µgm. of gibberellic acid.
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References
Guttridge, C. G., Ann. Bot., N.S., 23, 351 (1959).
Guttridge, C. G., Ann. Bot., N.S., 23, 612 (1958).
Thompson, P. A., and Guttridge, C. G., Nature, 184, B.A. 72 (1959).
Brian, P. W., and Hemming, H. G., Physiol. Plant., 8, 669 (1955).
Hewitt, E. J., “Sand and Water Culture Methods used in the Study of Plant Nutrition”, 189 (Commonwealth Agricultural Bureaux, 1952).
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THOMPSON, P. Direct Transmission of a Growth-promoting Substance from Strawberry to Pea. Nature 188, 682–683 (1960). https://doi.org/10.1038/188682a0
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DOI: https://doi.org/10.1038/188682a0
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