AbstractsBiology & Animal Science

Mechanisms of biocontrol of Gaeumannomyces graminis var. tritici by Pseudomonas corrugata strain 2140 : genetic and biochemical aspects / Ian Ross.

by Ian L. Ross

Institution: University of Adelaide
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.