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Relationship of Certain Fungi to Azotobacter in Nitrogen-Free Media

Azotobacter and various fungi were grown together in nitrogen-free media. Maximal fungal growth in the medium used was possible only at the expense of Azotobacter cells and growth was always accompanied by acid production. When the medium reached a pH of 2, the bacterial cells were aggregated on fungal hyphae and the culture fluid appeared to be free of Azotobacter. Aspergillus niger grew well at the expense of viable bacteria and other fungi grew well on heat-killed cells of A. vinelandii. Members of the genus Hormodendrum, although not causing significant decrease in pH, were also able to clear turbid cultures of Azotobacter. However, clearing, which involved the attachment of bacteria to fungal hyphae, was dependent on acid production by the fungi. Bacterial aggregation was followed by hyphal attachment, bacterial inactivation, and finally, bacterial cell lysis.

Identiferoai:union.ndltd.org:unt.edu/info:ark/67531/metadc798177
Date08 1900
CreatorsRay, Manfred G.
ContributorsVela, G. Roland, 1927-
PublisherNorth Texas State University
Source SetsUniversity of North Texas
LanguageEnglish
Detected LanguageEnglish
TypeThesis or Dissertation
Format122 leaves : ill., Text
RightsPublic, Ray, Manfred G., Copyright, Copyright is held by the author, unless otherwise noted. All rights

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