1887

Abstract

The effect of hymexazol on the linear extension of hyphae of a range of Oomycetes was examined. Twenty-five species were compared using four fungicide concentrations. Cluster analysis was used to look for similarities between species. The response of each taxon to the different concentrations of hymexazol was modelled. The parameters of these curves were then subjected to multivariate analysis. Both analyses revealed close relationships between the sensitivity to the fungicide and the current classification of the Oomycetes. Comparisons were made with the effect of metalaxyl on the same isolates.

Loading

Article metrics loading...

/content/journal/micro/10.1099/00221287-136-10-2127
1990-10-01
2024-11-08
Loading full text...

Full text loading...

/deliver/fulltext/micro/136/10/mic-136-10-2127.html?itemId=/content/journal/micro/10.1099/00221287-136-10-2127&mimeType=html&fmt=ahah

References

  1. Ali-Shtayeh M.S., Lim-HO C.L., Dick M.W. 1986; The phenology of Pythium (Peronosporomycetidae) in soil. Journal of Ecology 74:823–840
    [Google Scholar]
  2. Belkhiri A., Dick M.W. 1988; Comparative studies on the DNA of Pythium species and some possibly related taxa. Journal of General Microbiology 134:2673–2683
    [Google Scholar]
  3. Cochran W.G., Cox C.W. 1957; Experimental Designs,. Journal of General Microbiology, 2nd edn.. New York:: John Wiley.;
    [Google Scholar]
  4. Davidse L.C. 1986; Benzimidazole fungicides: mechanism of action and biological impact. Annual Review of Phytopathology 24:43–65
    [Google Scholar]
  5. Davidse L.C., Hofman A.E., Velthuis G.C.M. 1983; Specific interference of metalaxyl with endogenous RNA polymerase activity in isolated nuclei from Phytophthora megasperma f. sp. medicaginis. Experimental Mycology 7:344–361
    [Google Scholar]
  6. Dick M.W. 1969; Morphology and taxonomy of the Oomycetes, with special reference to Saprolegniaceae, Leptomitaceae and Pythiaceae. I. Sexual reproduction. New Phytologist 68:751–775
    [Google Scholar]
  7. Dick M.W. 1989; Phytophthora undulatacomb. nov. Mycotaxon 35:449–453
    [Google Scholar]
  8. Dick M.W. 1990; Patterns of phenology in populations of zoosporic fungi. In The Fungal Community: Its Organization and Role in the Ecosystem, 2nd edn.. Carroll G. C., Wicklow D. T. Edited by New York: Marcel Dekker; in the Press
    [Google Scholar]
  9. Dick M.W., Wong P.T.W., Clark G. 1984; The identity of the oomycete causing ‘Kikuyu Yellows’, with a reclassification of the downy mildews. Botanical Journal of the Linnean Society 89:171–197
    [Google Scholar]
  10. Dick M.W., Croft B.J., Magarey R.C., De Cock A.W.A.M., Clark G. 1989; A new genus of the Verruculvaceae (Oomycetes). Botanical Journal of the Linnean Society 99:97–113
    [Google Scholar]
  11. Hardman J.M., Dick M.W. 1989; Comparative resilience to dilution plate procedures shown by zoospore cysts of twenty Pythium species and five Phytophthoraspecies. Mycological Research 93:383–385
    [Google Scholar]
  12. Hardman J.M., Pike D.J., Dick M.W. 1989; Short-term retrievability of Pythiumpropagules in simulated soil environments. Mycological Research 93:199–207
    [Google Scholar]
  13. Ho H.H. 1987; Effect of hymexazol on growth and reproduction of low temperature Phytophthora species. Mycopathologia 98:17–20
    [Google Scholar]
  14. Jacob F., Neumann St. 1987; Principles of uptake and systemic transport of fungicides within the plant. In Modern Selective Fungicides, pp 13–30 Lyr H. Edited by New York: Longman;
    [Google Scholar]
  15. Masago H., Yoshikawa M., Fukuda M., Nakanishi N. 1977; Selective inhibition of Pythiumspp. on a medium for direct isolation of Phytophthoraspp. from soil and plants. Phytopathology 67:425–428
    [Google Scholar]
  16. Nakanishi T., Sisler H.D. 1983; Mode of action of hymexazol in Pythium aphanidermatum. Journal of Pesticide Science 8:173–181
    [Google Scholar]
  17. Payne R.W. and others 1987 GENSTAT 5 Reference Manual. Oxford:: Oxford University Press;
    [Google Scholar]
  18. Pearson J., Pike D.J., Dick M.W. 1990; A model for short-term fluctuations of Pythiumpropagules in soil. Mycological Research in the Press
    [Google Scholar]
  19. Ryan F.J., Beadle G.W., Tatum E.I. 1943; The tube method of measuring the growth rate of Neurospora. American Journal of Botany 30:784–799
    [Google Scholar]
  20. Takahi Y., Nakanishi T., Tomita K., Kaminura S. 1974; Effect of 3-hydroxy isoxazoles as soil fungicides in relation to their chemical structures. Annals of the Phytopathological Society of Japan 40:354–361
    [Google Scholar]
  21. Trinci A.P.J. 1974; A study of the kinetics of hyphal extension and branch initiation of fungal mycelia. Journal of General Microbiology 81:225–236
    [Google Scholar]
  22. Vesugi Y., Sisler H.R. 1978; Metabolism of a phosphoramidate by Pyricularia oryzae in relation to tolerance and synergism by a phosphorothiolate and isoprothiolane. Pesticide Biochemical Physiology 9:247–254
    [Google Scholar]
  23. Vaziri-Tehrani B., Dick M.W. 1980a.; Taxonomic significance of variations between ratios of cell wall amino acids in fungi, with special reference to Oomycetes. Transactions of the British Mycological Society 74:231–238
    [Google Scholar]
  24. Vaziri-tehrani B., Dick M.W. 1980b; Neutral and amino sugars from the cell walls of Oomycetes. Biochemical Systematics and Ecology 8:105–108
    [Google Scholar]
/content/journal/micro/10.1099/00221287-136-10-2127
Loading
/content/journal/micro/10.1099/00221287-136-10-2127
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error