SUMMARY The number of roots induced by indolebutyric acid (IBA)in cuttings of light‐grown seedlings of Phaseolus aureus Roxb. is greatly inhibited by high levels of ethanol. When supplied alone to cuttings of dark‐grown seedlings increasing concentrations of ethanol progressively reduce the number of roots. The ethanol is glycosylated, at least in part, to ethyl‐β‐glucoside which reaches concentrations several‐fold greater in cuttings of light‐grown seedlings compared to those of dark‐grown seedlings. In the hypocotyl of cuttings from light‐grown seedlings the glucoside constitutes 26% of the extracted sugar and 1100 μg/g fresh weight after a treatment of 18 h with 2 ml/1 ethanol.
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Middleton et al. (1978) studied this question.
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