Letter | Published:

Host Induced Change in the Morphology of a Powdery Mildew Fungus

Nature volume 212, pages 540541 (29 October 1966) | Download Citation

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Abstract

BLUMER'S1 work showed that the powdery mildews produce two types of conidiophore, those of the Erysiphe polygoni DC. type, producing one mature conidium in a day, and those of the Erysiphe cichoracearum DC. type, producing a chain of between two and eight mature conidia in a day. Childs2 later referred to these two powdery mildews as the non-chain forming and the chain forming types respectively. He showed that the former had a single peak period of spore liberation between 1000 and 1400 h, while the latter had a more complex diurnal cycle of spore liberation with two peaks, the first between 0600 and 0800 h and the second between 1400 and 1600 h. There is no evidence that the fungus which produces one type of conidiophore can produce the other in any circumstances.

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References

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    , Beitr. Kryptogamenfl. Schweiz., 7, 1 (1933).

  2. 2.

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    , Ann. Rep. Rubb. Res. Inst. Ceylon 1955, 70 (1956).

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    , Quart. J. Rubb. Res. Inst. Ceylon, 26, 13 (1949).

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    , Ann. Rep. Rubb. Res. Inst. Ceylon 1964 (in the press).

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    , Mycologia, 47, 688 (1955).

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Affiliations

  1. Rubber Research Institute of Ceylon, Dartonfield, Agalawatta, Ceylon.

    • O. S. PERIES

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https://doi.org/10.1038/212540b0

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