1887

Abstract

SUMMARY: The killing of conidia of by ultraviolet irradiation followed first-order kinetics; about 0.5 % of the conidia which survived a 97 % lethal dose were nutritionally deficient mutants. This percentage of mutants among survivors was constant for different wild-type isolates for the first-, second- and third-order irradiations. This regularity implies that most conidia exposed at the first irradiations contained a single haploid nucleus. Adenine-requiring mutants formed pionnotes when grown on an agar medium containing low concentrations of adenine, and the extent of pionnotal formation depended on the position at which adenine synthesis had been blocked by the irradiation. 4-Aminoimidazole-5-carboxamide apparently did not act as an extracellular intermediary in adenine synthesis. An acriflavine-resistant mutant arose spontaneously in one of the mutants selected for nutritional deficiency, but mutants resistant to certain other growth inhibitors were not found.

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1962-09-01
2024-04-23
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References

  1. Buxton E. W., Last F. T., Noun N. A. 1957; Some effects of ultraviolet radiation on the pathogenicity of Botrytis fabae, Uromyces fabae, and Erysiphe graminis. J. gen. Microbiol. 16:764
    [Google Scholar]
  2. Caroselli N. E. 1957; Verticillium wilt of maple. Bull. R.I. agric. Exp. Sta.335
    [Google Scholar]
  3. Fries N., Bergstrom S., Rottenberg M. 1949; The effect of various imidazole compounds on the growth of purine-deficient mutants of Ophiostoma. Physiol. Plant. 2:210
    [Google Scholar]
  4. Hastie A. C. 1962; Genetic recombination in the Hop-Wilt fungus Verticillium albo-atrum. J. gen. Microbiol. 27:373
    [Google Scholar]
  5. Isaac I. 1949; A comparative study of pathogenic isolates of Verticillium. Trans. Brit, mycol. Soc. 32:137
    [Google Scholar]
  6. Pontecorvo G. 1949; Auxanographic techniques in biochemical genetics. J. gen. Microbiol. 3:122
    [Google Scholar]
  7. Pontecorvo G., Roper J. A., Hemmons L. M., Macdonald K. D., Bufton A. W. J. 1953; The genetics of Aspergillus nidulans. Advanc. Genet. 5:141
    [Google Scholar]
  8. Reinke J., Berthold G. 1879; Die Zersetzung der Kartoffel durch Pilze. Unter-suchungen aus dem Botanischen Laboratorium der Universität Göttingen 1:1
    [Google Scholar]
  9. Robinson D. B., Larson R. H., Walker J. C. 1957; Verticillium wilt of potato in relation to epidemiology, symptoms and variability of the pathogen. Res. Bull. Wis. agric. Exp. Sta.202
    [Google Scholar]
  10. van den Ende G. 1958; Untersuchungen über den Pflanzenparasiten Verticillium albo-atrum. Acta Bot. Neerlandica 7:665
    [Google Scholar]
  11. Waggoner P. E. 1956; Variation in Verticillium albo-atrum from potato. Plant. Dis. Reptr. 40:429
    [Google Scholar]
  12. Wagner R. P., Mitchell H. K. 1955 Genetics and Metabolism. New York: John Wiley and Sons Inc;
    [Google Scholar]
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