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Effect of CO2 on the germination of conidiospores of Aspergillus niger (1961)

Vakil, J. R. ; Raghavendra Rao, M. R. ; Bhattacharyya, P. K.

Springer

Archives of microbiology 39 (1961), S. 53-57

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ISSN: 1432-072X

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: 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.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00406527

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Microbiological Transformation of Terpenes: Hydroxylation of α-Pinene (1960)

BHATTACHARYYA, P. K. ; PREMA, B. R. ; KULKARNI, B. D. ; [et al.]

[s.l.] : Nature Publishing Group

Nature 187 (1960), S. 689-690

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ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] The yields of essential oils from some oil-bearing plants are known to be considerably enhanced if the plants are infected by micro-organisms3. The present communication deals with the microbiological transformations of a-pinene by moulds. A preliminary screening of fungi on Czapek-Dox medium ...