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Note on the effect of temperature on a mixed culture of two organisms in symbiotic relation

Published online by Cambridge University Press:  27 March 2009

E. H. Richards
E. H. Richards
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts.
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Extract

1. A study was made of nitrogen-fixation by Azotobacter chroococcum alone in a medium containing dextrose (which it can utilize) and in mixture with a coliform organism on a medium containing no carbohydrate except starch, which Azotobacter cannot utilize unless it be hydrolysed by the coliform organism or some other agency.

2. The amount of nitrogen fixed in the mixed cultures was found to be maximal at two temperatures, and a discussion is given of the causes thought to be operative in producing the double maximum.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 29 , Issue 2 , April 1939 , pp. 302 - 305
Copyright
Copyright © Cambridge University Press 1939

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References

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