Abstract
ABOUT two years ago a batch of leafless cuttings of Bougainvillea (var. Mrs. Louis Walthen) was received at these laboratories for propagation. They were planted in our usual propagators. The majority threw out small shoots but there was no callussing or root development. After eighteen months it was decided to try the effect of a proprietary root growth-promoting substance. The cuttings still alive were treated in the normal way, that is, by immersion of the basal ends in a dilute solution for eighteen hours. However, no callussing or rooting took place and it is assumed that this was due to lack of transpiration in the cuttings, which were leafless when treated.
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JACKSON, T. Absorption of Growth-Promoting Substances by Cuttings. Nature 141, 835 (1938). https://doi.org/10.1038/141835a0
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DOI: https://doi.org/10.1038/141835a0
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