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Soil fungistasis: elevation of the exogenous carbon and nitrogen requirements for spore germination by fungistatic volatiles in soils.
Metadata
Journalcanadian journal of microbiology1.793Date
1975-Oct
Publication Type
Research Support, U.S. Gov't, Non-P.H.S.
Journal Article
Volume
1975-Oct / 21 : 1468-75
Author
Griffin GJ , Hora TS , Baker R
DoiPMIDMESH
Amino Acids
Antifungal Agents
Aspergillus flavus
Fusarium
Glucose
Hydrogen-Ion Concentration
Mitosporic Fungi
Models, Biological
Soil
Soil Microbiology
Spores, Fungal
Volatilization
Abstract
Axenic, washed conidia of Fusarium solani f. sp. phaseoli, Aspergillus flavus, and Verticillium albo-atrum were placed on washed Difco purified agar discs along with an inorganic salt solution containing various levels of carbon and nitrogen substrates. These discs were exposed to volatiles from six soils (pH 5.1-8.6). Fusarium solani macroconidial germination was inhibited mostly by volatiles from soils of pH 5.1, 6.1, 7.0, and 7.5, but high levels of glucose and NH4Cl reversed this inhibition, raising germination to that of no-soil, no-carbon or nitrogen controls. Conidial germination of A. flavus was inhibited mainly by volatiles from high pH (7.0, 7.8, and 8.6) soils, and increased levels of glucose plus an amino acid mixture nullified this inhibition. Volatiles from soils of pH 5.1, 6.1, and 7.5 stimulated A. flavus conidial germination. Assays after the removal of CO2 from the air above soil of pH 5.1 demonstrated that volatiles inhibitory to A. flavus were produced by this soil. Assays indicated that a KOH-soluble compound was a fungistatic soil volatile to F. solani macroconidial germination. The nullification by carbon and nitrogen substrates of F. solani and A. flavus inhibition caused by soil volatiles parallels that for soil fungistasis. Conidial germination of V. albo-atrum was markedly stimulated by volatiles in all soils tested, and was not affected by removal of CO2. Inhibitory soil volatiles may increase the nutritional requirements for spore germination of certain fungi.
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Can J Microbiolcanadian journal of microbiology
Metadata
LocationCanada
FromCANADIAN SCIENCE PUBLISHING

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