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Science 9 October 1987:
Vol. 238. no. 4824, pp. 197 - 200
DOI: 10.1126/science.238.4824.197
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Articles

Cloning and Detection of DNA from a Nonculturable Plant Pathogenic Mycoplasma-like Organism

BRUCE C. KIRKPATRICK 1, DRAKE C. STENGER 2, T. JACK MORRIS 2, and ALEXANDER H. PURCELL 3

1 Department of Plant Pathology, University of California, Davis, CA 95616.
2 Department of Plant Pathology, University of California, Berkeley, CA 94720.
3 Department of Entomology, University of California, Berkeley, CA 94720.

The ability to detect, quantify, and differentiate nonculturable mycoplasma-like organisms (MLOs) would greatly facilitate epidemiological and taxonomical studies of this unique group of plant and insect pathogens. DNA isolated from extracts of insects infected with the Western X-disease MLO was cloned in Escherichia coli. X-disease-specific clones, when labeled and used as probes, readily detected X-disease MLOs in infected plants and insects but did not hybridize with DNA from healthy plants or insects, or from several other plant pathogenic MLOs or spiroplasmas. These methods provide both a sensitive diagnostic tool and a basis for genetically differentiating MLOs.

Submitted on June 3, 1987
Accepted on August 7, 1987


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