Abstract
IN submerged shaken cultivation in a synthetic medium containing potassium nitrate, potassium dihydrogen phosphate, and magnesium sulphate, trace elements and pure (analytical reagent) glucose, Penicillium griseofulvum Dierckx (Strain ARL. 375) grows vegetatively but does not sporulate even when it has used up all the available nitrogen. Abundant sporulation at a relatively early, exponential, stage of growth was observed when pure glucose was replaced by a crude commercial glucose derived from maize starch by acid hydrolysis1. Crude glucose was also found to stimulate submerged sporulation in 5 other species of Penicillium out of a further 21 species which were tested. The nature of the sporing factors in crude glucose was therefore investigated.
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ARMSTRONG, J., ENGLAND, D., MORTON, A. et al. Stimulation of Sporulation in Penicillium by Anhydroglucose. Nature 197, 723 (1963). https://doi.org/10.1038/197723a0
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DOI: https://doi.org/10.1038/197723a0
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