1887

Abstract

SUMMARY

sp. of soil yeast, probably of the ‘ starkeyi ’ or ‘ lipofer ’ type, degraded paraquat over a wide range of pH and temperatures, extreme values of which reduced growth but not paraquat degradation. The organism withstood high concentrations of the herbicide.

Growth in nitrogen-depleted broth amended with paraquat showed a lag phase of about 24 h. There was no lag with (NH)S0 either alone or with paraquat, but in the latter case paraquat degradation was delayed for 24 h.

A 24 h exposure to paraquat and a carbon source was necessary for synthesis of the paraquat-catabolizing system.

The organism grew well on soil extract and malt extract and media containing (NH)SO or NHNO as nitrogen sources; it grew with urea or NaNO after a lag of 24 h or longer, but not on biuret or NaNO. Atmospheric N was fixed in the presence of added molybdate. The presence of alternative nitrogen sources did not prevent or delay paraquat degradation.

A variety of mono-, di- and polysaccharide materials was used as carbon and energy source. Growth was not obtained with powdered cellulose, carboxy-methyl- cellulose, lactose or paraquat as sole carbon source. The organism was unable to ferment carbohydrates or degrade paraquat anaerobically; it degraded commercial formulations of paraquat, but growth and degradation were affected by increasing concentrations of formulating additives.

Loading

Article metrics loading...

/content/journal/micro/10.1099/00221287-70-1-43
1972-04-01
2021-10-23
Loading full text...

Full text loading...

/deliver/fulltext/micro/70/1/mic-70-1-43.html?itemId=/content/journal/micro/10.1099/00221287-70-1-43&mimeType=html&fmt=ahah

References

  1. Abadie F. 1968; Assimilation des nitrites et de composses azotes organiques par quelques levures et orga- nismes levuriformes. Annales de Vlnstitut Pasteur Paris: 115197–211
    [Google Scholar]
  2. Baldwin B. C., Bray M. F., Geoghegan M. J. 1966; The microbial decomposition of paraquat. Biochemical Journal 101:15P
    [Google Scholar]
  3. Calderbank A., Yuen S. H. 1965; An ion exchange method for determining paraquat residues in food crops. Analyst London: 9099–107
    [Google Scholar]
  4. Fowell R. R. 1969; Sporulation and hybridization of yeasts. In The Yeasts 1 pp 303–383 Rose A. H., Harrison J. S. Edited by Academic Press: London;
    [Google Scholar]
  5. Kreger-van RIJ N. J. W. 1969; Taxonomy and systematics of yeasts. In The Yeasts 1 pp 5–78 Rose A. H., Harrison J. S. Edited by London: Academic Press;
    [Google Scholar]
  6. Lodder J., Kreger-van Rij N. J. W. 1952 The Yeasts-a Taxonomic Study Amsterdam: North Holland Publishing Co;
    [Google Scholar]
  7. Omura H., Osajima Y., Tsukamoto T. 1966; Some properties of urea dehydrogenase in tissues of higher plants. Enzymologia: Acta Biocatalytica 31:129–154
    [Google Scholar]
  8. Pramer D., Schmidt E. L. 1964 Experimental Soil Microbiology Minneapolis: Burgess Publishing Co;
    [Google Scholar]
  9. Roon R. J., Levenberg B. 1968; An ATP-dependent, avidin sensitive enzymic cleavage of urea in yeast and green algae. The Journal of Biological Chemistry 243:5213–5215
    [Google Scholar]
  10. Starkey R. L. 1946; Lipid production by a soil yeast. Journal of Bacteriology 51:33–50
    [Google Scholar]
  11. Wallnofer P. 1968; Untersuchungen iiber die antimikrobielle Wirkung von Diequat und Paraquat. Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz 75:218–224
    [Google Scholar]
  12. Wilkinson V., Lucas R. L. 1969; Effects of constituents of ‘Gramoxone W’ on rates of respiration of soil fungi. Weed Research 9:288–295
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journal/micro/10.1099/00221287-70-1-43
Loading
/content/journal/micro/10.1099/00221287-70-1-43
Loading

Data & Media loading...

Most cited this month Most Cited RSS feed

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