If you need an accessible version of this item please contact JSTOR User Support

Antifungal Activity of Defensive Secretions of Certain Millipedes

R. W. Roncadori, S. S. Duffey and M. S. Blum
Mycologia
Vol. 77, No. 2 (Mar. - Apr., 1985), pp. 185-191
DOI: 10.2307/3793067
Stable URL: http://www.jstor.org/stable/3793067
Page Count: 7
  • Download PDF
  • Cite this Item

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support
Antifungal Activity of Defensive Secretions of Certain Millipedes
Preview not available

Abstract

The defensive secretions of certain polydesmid millipedes exhibited antifungal activity by suppressing mycelial growth and spore germination of ten different fungi isolated from millipedes and adjacent soil. A group of compounds designated as system I, identified from members of the Xystodesmidae, consisted of benzaldehyde, benzoic acid, benzoyl cyanide, and mandelonitrile benzoate. Benzoic acid and benzoyl cyanide were the best inhibitors of mycelial growth and spore germination, usually acting at concentrations of 250, 500, or 1000 μg/ml. A mixture of the four defensive compounds (total of 125 μg/ml) suppressed spore germination more effectively than the individual compounds and appeared to function synergistically. Ethyl benzoate, guaiacol, and phenol were designated as system II as reported for Oxidus gracilis. In spore germination tests, phenol generally caused maximum inhibition at concentrations of 500 to 1000 μg/ml, whereas the other compounds were less effective. A mixture of the defensive compounds did not improve suppression of spore germination.

Page Thumbnails

  • Thumbnail: Page 
185
    185
  • Thumbnail: Page 
186
    186
  • Thumbnail: Page 
187
    187
  • Thumbnail: Page 
188
    188
  • Thumbnail: Page 
189
    189
  • Thumbnail: Page 
190
    190
  • Thumbnail: Page 
191
    191