Seasonal Dynamics of Various Scab-Causing Genotypes Among Potato Fields on Prince Edward Island.

Potato common scab is an important bacterial plant disease caused by numerous species and strains. A better understanding of the genetic diversity and population dynamics of these microorganisms in the field is crucial to develop effective control methods. Our research group previously studied the genetic diversity of scab-causing spp.

Pyoluteorin and 2,4-diacetylphloroglucinol are major contributors to Pf-5 biocontrol against in cannabis.

Pf-5 is an effective biocontrol agent that protects many crops against pathogens, including the fungal pathogen causing gray mold disease in crops. Previous studies have demonstrated the important role of antibiotics pyoluteorin (PLT) and 2,4-diacetylphloroglucinol (DAPG) in Pf-5-mediated biocontrol. To assess the potential involvement of PLT and DAPG in the biocontrol exerted by Pf-5 against in the phyllosphere of , two knockout Pf-5 mutants were generated by in-frame deletion of genes or , required for the synthesis of PLT or DAPG respectively, using a two-step allelic exchange method.

In Tuber Biocontrol of Potato Late Blight by a Collection of Phenazine-1-Carboxylic Acid-Producing spp.

Phenazine-1-carboxylic acid (PCA) produced by plant-beneficial spp. is an antibiotic with antagonistic activities against , the causal agent of potato late blight. In this study, a collection of 23 different PCA-producing spp.

Rheological and water binding properties of xanthan, guar and ultra-finely milled oatmeal in white birch sap: Influence of sap minor constituents.

White Birch Sap (WBS) contains appreciable amounts of mineral ions and phenolic compounds and can be used as alternate solvent for food applications. In this study, the effect of the mineral and phenolic composition of WBS was evaluated on the physical properties of xanthan gum, guar gum, ultra-finely milled oatmeal and their combinations in solution. Solutions were formulated with WBS and with solvents mimicking WBS without phenolic compounds and WBS without phenolics nor mineral ions.

Inhibition of Three Potato Pathogens by Phenazine-Producing spp. Is Associated with Multiple Biocontrol-Related Traits.

Phenazine-producing Pseudomonas spp. are effective biocontrol agents that aggressively colonize the rhizosphere and suppress numerous plant diseases. In this study, we compared the ability of 63 plant-beneficial phenazine-producing Pseudomonas strains representative of the worldwide diversity to inhibit the growth of three major potato pathogens: the oomycete Phytophthora infestans, the Gram-positive bacterium Streptomyces scabies, and the ascomycete Verticillium dahliae.

Diversity of phytobeneficial traits revealed by whole-genome analysis of worldwide-isolated phenazine-producing Pseudomonas spp.

Plant-beneficial Pseudomonas spp. competitively colonize the rhizosphere and display plant-growth promotion and/or disease-suppression activities. Some strains within the P.