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Estimation of nuclear ratio and its influence on the rate of growth of Aspergillus niger heterocaryon

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Summary

A heterocaryon (hist/hypox) was employed to study the nuclear ratio in relation to the composition of the medium and to growth. The data showed that supplementation of the growth factors in any ratio in the medium had no influence on the shift of nuclear ratio, unless and until one of the growth factors was reduced to its limiting value. In such circumstances, if the amount of the other growth factor was increased, it did effect the increase of the appropriate nuclei in the heterocaryon, for which this growth factor was required. Both nuclear types responded in this manner.

Although the nuclear ratio in the heterocaryon did not show a direct relation to its rate of growth, the rate of growth was effected by the amount of growth factors added to the medium.

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  1. Department of Microbiology, Medical College of Virginia, Richmond, Virginia, USA

    Ishwari Prasad

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  1. Ishwari Prasad
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Communicated by F. Kaudewitz

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Prasad, I. Estimation of nuclear ratio and its influence on the rate of growth of Aspergillus niger heterocaryon. Molec. Gen. Genet. 103, 223–227 (1968). https://doi.org/10.1007/BF00273690

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  • DOI: https://doi.org/10.1007/BF00273690

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