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- Title
Studies on the Respiration of Wheat Infected with Stem Rust and Powdery Mildew.
- Authors
Farkas, G. L.; Király, Z.
- Abstract
1. The respiration of wheat seedlings infected with stem rust and powdery mildew is considerably augmented. 2. By the use of various inhibitors it has been found that the parasitically increased respiration involves also qualitative changes in comparison with the normal respiration. 3. The respiration of healthy plants is malonate-sensitive but on the contrary that of the infected tissues is highly insensitive to malonate. 4. The glycolysis inhibitors (fluoride, iodoacetate) are equally influencing the respiration of healthy and diseased plants. 5. The respiration of both control and infected plants is highly sensitive to azide. The O2-uptake of healthy tissues is totally resistant to cyanide. However, the infection is correlated with the development of a cyanide- sensitive fraction, 6. R.Q. in both healthy and diseased plants is around 1.0. In malonate treated tissues the R.Q. rises over 2.0. 7. Contrary to expectations, the presence of toxin could not be detected. 8. The results seem to substantiate the fact that the respiratory changes are taking place in the tissues of host and cannot be explained by the additive effect of fungus respiration. 9. An attempt has been made to interprete the parasitically stimulated respiration in biochemical terms. As a theory of the possible mechanisms the proposed views about the abolishing of Pasteur effect have the greatest possibility at present.
- Subjects
RESPIRATION; VITAL signs; ORGANS (Anatomy); TISSUES; POWDERY mildew diseases; BOTANY
- Publication
Physiologia Plantarum, 1955, Vol 8, Issue 4, p877
- ISSN
0031-9317
- Publication type
Article
- DOI
10.1111/j.1399-3054.1955.tb07783.x