Abstract
GIBBERELLIC acid, a metabolic product of the fungus, Gibberella fujikuroi, has shown marked effects on plant growth, stimulating stem and leaf elongation. British investigators1 have studied its influence on a number of bacteria and moulds and have briefly stated they were unable to detect any effect, either inhibitory or stimulatory. Although there is indirect evidence that gibberellic acid is rapidly decomposed in the soil1, there have been no reports concerning action of the acid on soil micro-organisms and their activities. The following preliminary experiments were carried out to determine if gibberellic acid had any effect on terminal respiration of the soil microbial population in conventional Warburg runs.
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References
Brian, P. W., Hemming, G. W., and Radley, M., J. Sci. Food and Agric., 5, 602 (1954).
Gilmour, C. M., Bollen, W. B., and Damsky, L., Agronomy Absts., 20 (1955).
Martin, W. P., Ariz. Agric. Exp. Sta. Tech. Bull. 83 (1940).
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LU, K., GILMOUR, C., ZAGALLO, A. et al. Effects of Gibberellic Acid on Soil Micro-organisms. Nature 181, 189–190 (1958). https://doi.org/10.1038/181189a0
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DOI: https://doi.org/10.1038/181189a0
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