Importance of preferential flow and soil management in vertical transport of a biocontrol strain of Pseudomonas fluorescens in structural field soil

Article Abstract:

The bacteria released into the fields for bioremediation or the control of plant diseases are transported after heavy rainfall to a depth of 150 cm in the soil through channels of preferential flow. The transport of the Pseudomonas fluorescens CHA0 strain with a resistance to rifampin is similar to that of the nonreactive bromide tracer. The transport of the tracer is higher in ley than in wheat. The downward movement of the bacteria due to preferential flow may contaminate ground water and should be considered while using bacteria for plant disease control.

Environmental aspects, Control, Plant diseases, Pseudomonas fluorescens

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Characterization of phIG, a hydrolase that specifically degrades the antifungal compound 2,4-diacetylphloroglucinol in the biocontrol agent Pseudomonas flourescens CHA0

Article Abstract:

A study was conducted on the function of phIG as a hydrolase that specifically degrades the potent antimicrobial compound 2,4-diacetylphloroglucinol (DAPG) to equimolar amounts of mildly toxic monoacetylphloroglucinol (MAPG) and acetate. Results showed a strict substrate specificity of the phIG enzyme and a strong reduction in its activity by pyoluteorin, a further antifungal compound produced by the bacterium.

Analysis, Usage, Enzymes, Polymerase chain reaction, Properties, Hydrolases, Nucleotide sequencing

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Cross talk between 2,4-diacetylphloroglucinol-producing biocontrol pseudomonas on wheat roots

Article Abstract:

An insight into the signaling events that influence the expression of antibiotic-biosynthetic genes in Pseudomonas populations in the rhizosphere is provided considering the example of 2,4,-diacetylphloroglucinol (DAPG). The nonrelated pseudomonads may be responsible for stimulating each other in the expression of an antimicrobial compound that is important for biocontrol.

Science & research, Flour and other grain mill products, Flour Milling, Wheat Products ex Flour, Research, Pseudomonas, Rhizosphere, Wheat products

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