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Effect of CO2 on the germination of conidiospores of Aspergillus niger

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Summary

The effect of different concentrations of CO2 on the germination of conidiospores of Aspergillus niger A 5 has been studied using Pardee's buffer mixtures which maintain constant CO2 tensions. The beneficial effect of CO2 on germination is maximum at 0.5% CO2 concentration, when 70–90% of the spores germinate within 6 hours, whereas in controls with air containing 0.03% CO2 there is only 15–20% germination at 6 hours. At higher CO2 concentrations this beneficial effect of CO2 on germination diminishes and at 3% there is a complete inhibition of spore germination.

The spore density and the ph of the medium have a noticeable effect on germination rates in presence of 0.5% CO2. The germination rates decrease at spore densities higher than 5 · 105/ml and at a ph of 6.8.

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Communication No. 431.

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Vakil, J.R., Raghavendra Rao, M.R. & Bhattacharyya, P.K. Effect of CO2 on the germination of conidiospores of Aspergillus niger. Archiv. Mikrobiol. 39, 53–57 (1961). https://doi.org/10.1007/BF00406527

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