Some effects of organic acid supplementation on utilization of ammonium compounds by three pathogenic fungi
- 14 Downloads
Utilization of ammonium nitrogen byFusarium moniliformeSheld.,Curvularia verruciformisAgarwal &Sahni andSclerotium rolfsiiSacc., with and without organic acid supplementation was studied. Ammonium utilization by these organisms generally improved with small amounts of organic acid supplementation except in the case ofC. verruciformis on ammonium chloride where fumaric acid was observed to suppress utilization. Effects of supplementation were seen to be dependent on the nature of the organic acid, the ammonium source used and the organism employed. Further evidence obtained by varying the quantities of succinic acid in ammonium chloride media showed that higher levels of supplementation gave increased growth of the fungi and prevented the pH from falling. It seems that these acids play a dual role as pH buffers as well as nutritional compounds.
KeywordsNitrogen Chloride Ammonium Organic Acid Pathogenic Fungus
Unable to display preview. Download preview PDF.
- Apparao, A. (1956). The role of pH in nitrogen utilization byPiricularia oryzae.Experientia, 12:215.Google Scholar
- Bernard, K. &Albrecht, H. (1947). Stoffwechselprodukte des MikroorganismusPhycomyces blakesleeanus in glucose-haltiger Nahrlosung und Untersuchungen über das Wachstum dieses Schimmelpilzes bei verschiedenen Stickstoffketten.Helv. Chem. Acta. 30:627–632.Google Scholar
- Brian, P. W., Curtis, P. J. &Hemming, H. G. (1947). Glutinosin: a fungistatic metabolic product of the mouldMetarrhizium glutinosum S. Pope,Proc. Roy. Soc. Lond. 130 B:106–132.Google Scholar
- Burkholder, P. R. &McVeigh, I. (1940). Growth ofPhycomyces blakesleeanus in relation to varied environmental conditions.Amer. J. Bot. 27:630–640.Google Scholar
- Cochrane, V. W. (1958). Physiology of fungi. John Wiley & Sons Inc., N. Y., 524 pp.Google Scholar
- Johnson, S. P. &Joham, H. E. (1954). Some physiological notes onSclerotium rolfsii-I. Utilization of certain carbon compounds.Pl. Dis. Rep. 38:602–606.Google Scholar
- Kodanda Pany, V. &Apparao, A. (1963) Studies on the nutritional physiology ofSclerotium rolfsii Sacc.Proc. Indian Acad. Sci. 57:236–338.Google Scholar
- Leonian, L. H. &Lilly, V. G. (1940). Studies on the nutrition of fungi -IV. Factors influencing the growth of some thiamine requiring fungi.Amer. J. Bot. 27:18–26.Google Scholar
- Machlis, L. (1953). Growth and nutrition of water molds in the subgenusEuallo myces-I.Amer. J. Bot. 40:189–195.Google Scholar
- Morton, A. G. &MacMillan, A. (1954). The assimilation of nitrogen from ammonium salts and nitrate by fungi.J. exp. Bot. 5:232–252.Google Scholar
- Tandon, R. N. 1961. Physiological studies on some pathogenic fungi. U.P. Sci. Res. Comm. Monogr., Allahabad, 80pp.Google Scholar