Ms Tran Thi Thu Ha: "Interactions between biosurfactant-producing Pseudomonas and Phytophthora species"

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9 Oct 2007 16:00
Unit: Wageningen University
Location: Aula, building 362, Gen. Foulkesweg 1, Wageningen
Organisation: Wageningen University
Promotor: prof.dr.ir. P.J.G.M. Wit de (Phytopathology)
Co Promotor: Dr. J.M. Raaijmakers

 Fluorescent Pseudomonas bacteria produce a wide variety of antimicrobial metabolites, including soap-like compounds referred to as biosurfactants. The results of this thesis showed that biosurfactant-producing Pseudomonas bacteria are effective in controlling Phytophthora foot rot disease of black pepper in Vietnam and promote root and shoot development of the ‘King of Spices’. Biosurfactant-producing P. fluorescens strain SS101 was also effective in controlling tomato late blight caused by Phytophthora infestans. Current and future studies focus on how to implement these biocontrol agents in an integrated management practice to control Phytophthora diseases. The broad-spectrum activity of these antagonistic Pseudomonas bacteria and their biosurfactants also provide new opportunities to apply these agents for the protection and growth promotion of other crops. 
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