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Studies in the genus phytophthora

I. Oospore formation and taxonomy ofPhytophthora palmivora butler

  • Published:
Proceedings / Indian Academy of Sciences

Summary

The formation of oospores in paired cultures of twenty-five isolates ofPhytophthora was studied. These isolates fall into two main groups—the “plus” and the “minus” and the members of one group form oospores when paired with members of the other group. Some of the isolates were found to lose their sexual capacity with continued cultivation on agar media. Fresh isolates form oospores quickly with complementary strains.

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Authors and Affiliations

  1. Mycology Department, Agricultural Research Institute, Coimbatore

    K. M. Thomas, T. S. Ramakrishnan, C. K. Soumini & M. S. Balakrishnan

Authors
  1. K. M. Thomas
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  2. T. S. Ramakrishnan
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  3. C. K. Soumini
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  4. M. S. Balakrishnan
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Additional information

Communicated by Dr. B. Viswanath,c.i.e., d.sc., f.r.i.c.

All these isolates belong toP. palmivora, Butl. The other species ofPhvtophthora, viz., P. arecœ,P. meadii, P. faberi andP. parasitica var. nicotianœ—are to be merged inP. palmivora as they are found to be morphologically similar and do not exhibit any constant and reliable differences fromP. palmivora and readily form oospores when paired with it. This species is heterothallic; but homothallism has been reported to have been noticed in some isolates.

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Thomas, K.M., Ramakrishnan, T.S., Soumini, C.K. et al. Studies in the genus phytophthora. Proc. Indian Acad. Sci. 26, 147–163 (1947). https://doi.org/10.1007/BF03049694

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  • DOI: https://doi.org/10.1007/BF03049694

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