Soil Fungistasis: Role of Spore Exudates in the Inhibition of Nutrient-independent Propagules Free

Abstract

SUMMARY: Suppression of germination of conidia of was similar during incubation on sand being leached with water and on sand leached with salt solutions. Conidia of and , and sclerotia of , exuded more C label during leaching with phosphate buffer than on buffer-saturated sand without leaching. Conidia of and became dependent upon exogenous nutrients after 7 days’ incubation on soil or leached sand. Decreased viability followed the loss of nutrient independence. Germination of and was stimulated when they were leached with exudate from spores of either fungus, or by a dilute nutrient solution simulating natural exudate. Conidia rendered nutrient-dependent by leaching, germinated and accumulated radioactivity when incubated on exudate from C-labelled spores. Nutrient-independent spores exude non-specific energy-rich nutrients which may be rendered unavailable to the spores by microbial activity in soil, resulting in fungistasis.

Loading

Article metrics loading...

/content/journal/micro/10.1099/00221287-90-1-140
1975-09-01
2024-03-29
Loading full text...

Full text loading...

/deliver/fulltext/micro/90/1/mic-90-1-140.html?itemId=/content/journal/micro/10.1099/00221287-90-1-140&mimeType=html&fmt=ahah

References

  1. Bray G. A. 1960; A simple efficient liquid scintillator for counting aqueous solutions in a liquid scintillation counter. Annals of Biochemistry 1:279–285
    [Google Scholar]
  2. Daly J. M., Knoche H. W., Wiese M. V. 1967; Carbohydrate and lipid metabolism during germination of uredospores of Puccinia graminis tritici. Plant Physiology 42:1633–1642
    [Google Scholar]
  3. Emmatty D. A., Green R. J.Jun. 1969; Fungistasis and behaviour of microsclerotia of Verticillium albo-atrum in soil. Phytopathology 59:1590–1595
    [Google Scholar]
  4. Hsu S. C., Lockwood J. L. 1973; Soil fungistasis: behaviour of nutrient-independent spores and sclerotia in a model system. Phytopathology 63:334–337
    [Google Scholar]
  5. Jackson R. M., Knight R. A. 1973; Conidial germination of Cochliobolus sativus on soil and under artificial nutrient stress. In Abstracts of Papers, Second International Congress of Plant Pathology. Minneapolis: University of Minnesota;
    [Google Scholar]
  6. Ko W. H., Lockwood J. L. 1967; Soil fungistasis: relation to fungal spore germination. Phytopathology 57:894–901
    [Google Scholar]
  7. Lingappa B. T., Lockwood J. L. 1964; Activation of soil microflora by fungus spores in relation to soil fungistasis. Journal of General Microbiology 35:215–227
    [Google Scholar]
  8. Lukens R. J. 1960; Conidial production from filter paper cultures of Helminthosporium vagans and Alternaria solani. Phytopathology 50:867–868
    [Google Scholar]
  9. Pringle R. B., Scheffer R. P. 1963; Purification of the selective toxin of Periconia circinata. Phytopathology 53:785–787
    [Google Scholar]
  10. Steiner G. W., Lockwood J. L. 1969; Soil fungistasis: sensitivity of spores in relation to germination time and size. Phytopathology 59:1084–1092
    [Google Scholar]
  11. Sztejnberg A., Blakeman J. P. 1973; Studies on leaching of Botrytis cinerea conidia and dye absorption by bacteria in relation to competition for nutrients on leaves. Journal of General Microbiology 78:15–22
    [Google Scholar]
  12. Tsao P. H., Hawthorne B. T. 1970; Soil fungistasis, soil amendments, lysis, and biological control of Thielaviopsis basicola. Proceedings, Seventh International Congress of Plant Protection Paris: pp. 534–535
    [Google Scholar]
  13. Yoder D. L., Lockwood J. L. 1973; Fungal spore germination on natural and sterile soil. Journal of General Microbiology 74:107–117
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journal/micro/10.1099/00221287-90-1-140
Loading
/content/journal/micro/10.1099/00221287-90-1-140
Loading

Data & Media loading...

Most cited Most Cited RSS feed