Mechanisms of biocontrol of Gaeumannomyces graminis var. tritici by Pseudomonas corrugata strain 2140 : genetic and biochemical aspects / Ian Ross.
Institution: | University of Adelaide |
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Department: | |
Year: | 1996 |
Keywords: | Gaeumannomyces graminis Biological control.; Take-all disease Biological control.; Soilborne plant diseases Biological control.; Wheat Diseases and pests Biological control.; Pseudomonas Genetics. |
Record ID: | 1032146 |
Full text PDF: | http://hdl.handle.net/2440/18760 |
Pseudomonas corrigata strain 2140 (Pc2140), isolated from wheat field soil in Australia, antagonises the take-all fungus, Gaeumannomyces graminis var. tritici (Ggt) in vitro and significantly reduces take-all symptoms on wheat in pot trials. This study investigates the mechanisms by which the biocontrol agent reduces the disease symptoms. Biochemical analysis of metabolites of P. corrugata 2140 reveal a number of compounds potentially antagonistic to Ggt and which may play a role in disease control. These include water-soluble antibiotics, siderophores, proteases, peptides and volatiles including hydrogen cyanide.