Iturin Levels on Wheat Spikes Linked to Biological Control of Fusarium Head Blight by Bacillus amyloliquefaciens

• DOI: 10.1094/phyto-07-12-0154-r
• Publication Date: 2012-10-17T13:43:03Z
• Authors: J. M. Crane; D. M. Gibson; R. H. Vaughan; G. C. Bergstrom
• Keywords: Bacillus amyloliquefaciens; Bacillus (shape); Antibiosis

The TrigoCor strain of Bacillus amyloliquefaciens provides consistent control against Fusarium head blight wheat in controlled settings but there is a lack disease and deoxynivalenol suppression field settings. Since production antifungal compounds thought to be the main mode action control, we quantified levels key family metabolites, iturins, as well monitored populations on spikes over 14 days post-application both greenhouse field. We found that initial iturin were three times greater than field, by 3 post-application, equivalent very low also determined iturins declined rapidly 3-day period environments, despite presence significant populations. Greenhouse trials antibiosis tests indicated lower could major factor limiting Future efforts improve phyllosphere various plants should focus maintaining higher critical infection periods.