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Science 2 July 1971:
Vol. 173. no. 3991, pp. 67 - 69
DOI: 10.1126/science.173.3991.67
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Articles

Southern Corn Leaf Blight: Susceptible and Resistant Mitochondria

Raymond J. Miller 1 and David E. Koeppe 1

1 Department of Agronomy, University of Illinois, Urbana 61801

Mitochondria isolated from etiolated shoots of blight-susceptible and blight-resistant corn plants were subjected, in various respiratory states, to the pathotoxin released by Helminthosporium maydis (race T). The addition of the pathotoxin to susceptible mitochondria caused respiratory rate and oxidative phosphorylation changes. The addition of pathotoxin to susceptible mitochondria suspended in a potassium chloride reaction medium induced an immediate and irreversible swelling regardless of the respiratory state of the mitochondria. This membrane swelling correlates with the observed respiratory and coupling effects of the pathotoxin. In all instances, mitochondria isolated from blightresistant corn failed to exhibit any of the above responses to the pathotoxin.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Structural dynamics of cereal mitochondrial genomes as revealed by complete nucleotide sequencing of the wheat mitochondrial genome.
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The Texas Cytoplasm of Maize: Cytoplasmic Male Sterility and Disease Susceptibility.
C. S. Levings III (1990)
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A 13-kilodalton maize mitochondrial protein in E. coli confers sensitivity to Bipolaris maydis toxin.
R. Dewey, J. Siedow, D. Timothy, and C. Levings 3rd (1988)
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Host-Selective Toxins and Their Role in Plant Diseases.
R. P. Scheffer and R. S. Livingston (1984)
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Mitochondrial Heredity: A Determinant in the Toxic Response of Maize to the Insecticide Methomyl.
D. E. KOEPPE, J. K. COX, and C. P. MALONE (1978)
Science 201, 1227-1229
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Pollen Abortion in T Cytoplasmic Male-Sterile Corn (Zea mays): A Suggested Mechanism.
H. E. WARMKE and S.-L. J. LEE (1978)
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Restriction Endonuclease Analysis of Mitochondrial DNA from Normal and Texas Cytoplasmic Male-Sterile Maize.
C. S. LEVINGS III and D. R. PRING (1976)
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Science. ISSN 0036-8075 (print), 1095-9203 (online)