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Science 8 July 1988:
Vol. 241. no. 4862, pp. 208 - 210
DOI: 10.1126/science.241.4862.208
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Articles

Cell-Autonomous Recognition of the Rust Pathogen Determines Rp1-Specified Resistance in Maize

JEFFREY L. BENNETZEN 1, WILLIAM E. BLEVINS 2, and ALBERT H. ELLINGBOE 3

1 Department of Biological Sciences, Purdue University, West Lafayette, IN 47907.
2 School of Veterinary Medicine, Purdue University, West Lafayette, IN 47907.
3 Departments of Plant Pathology and Genetics, University of Wisconsin, Madison, WI 53706.

The Rp1 gene of maize determines resistance to the leaf rust pathogen Puccinia sorghi. X-ray treatment of heterozygous (Rp1 Oy/rp1 oy) maize embryos generated seedlings with yellow sectors lacking. Rp1. Yellow sectored seedlings inoculated with rust spores gave rust pustule formation in yellow (Rp1-lacking) sectors and hypersensitive resistance in green tissues, thereby demonstrating that the Rp1 gene product is cellautonomous in its action. In cases where the hypersensitive reaction was initiated in green (Rp1) tissue next to a yellow sector, the hypersensitive response appeared to be propagated poorly, if at all, through Rp1-lacking cells.

Submitted on October 13, 1987
Accepted on April 13, 1988


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Phase Change and the Regulation of Shoot Morphogenesis in Plants.
R. S. Poethig (1990)
Science 250, 923-930
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