Complete genome sequence of LBUM494, a plant-beneficial strain isolated from the rhizosphere of a strawberry plant.

Here, we present the complete genome sequence of LBUM494, a plant-beneficial bacterial strain isolated from the rhizosphere of a strawberry plant grown in an agricultural field located in Bouctouche, New Brunswick, Canada. The genome size is 3,699,913 bp with a GC content of 41.7%.

Virulence Determinants Are Unevenly Distributed Within Species and Strains Causing Potato Common Scab in the Province of Quebec, Canada.

Potato common scab is an important bacterial disease afflicting potatoes around the world. Better knowledge of the local spp. populations causing this disease is key to developing durable control strategies.

Identification and genomic characterization of spp. displaying biocontrol activity against in lettuce.

Lettuce is an economically major leafy vegetable that is affected by numerous diseases. One of the most devastating diseases of lettuce is white mold caused by . Control methods for this fungus are limited due to the development of genetic resistance to commonly used fungicides, the large number of hosts and the long-term survival of sclerotia in soil.

Editorial for Special Issue "Interactions between Plant Beneficial spp. and Their Host".

Plant-beneficial spp [...

spp. can help plants face climate change.

Climate change is increasingly affecting agriculture through droughts, high salinity in soils, heatwaves, and floodings, which put intense pressure on crops. This results in yield losses, leading to food insecurity in the most affected regions. Multiple plant-beneficial bacteria belonging to the genus have been shown to improve plant tolerance to these stresses.

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.

Genome Sequences of Two Plant-Beneficial Strains Isolated from Agricultural Soils in the Province of Quebec, Canada.

Two strains, B21-013 and B21-037, were isolated from agricultural soils located in the province of Quebec, Canada, as part of a screening for plant-beneficial bacteria able to suppress Xanthomonas hortorum pv. and other lettuce bacterial pathogens. Here, we report the genome sequences of these two organisms.

Harnessing the genomic diversity of strains against lettuce bacterial pathogens.

Lettuce is a major vegetable crop worldwide that is affected by numerous bacterial pathogens, including pv. , , and . Control methods are scarce and not always effective.

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.

Genome Sequences of Two Soil-Dwelling Bacteria Belonging to the Family .

Members of the family are rod-shaped betaproteobacteria found in various environments. Here, we report the genome sequences of 2 bacteria belonging to this family. They were isolated from agricultural soils located in the Montérégie region (Quebec, Canada) and display biocontrol activity against various lettuce bacterial pathogens.

Combining Desirable Traits for a Good Biocontrol Strategy against .

The fungal pathogen (Helotiales: Sclerotiniaceae) causes white mold, a disease that leads to substantial losses on a wide variety of hosts throughout the world. This economically important fungus affects yield and seed quality, and its control mostly relies on the use of environmentally damaging fungicides. This review aimed to present the latest discoveries on microorganisms and the biocontrol mechanisms used against white mold.

Interplay between Genotype, Plant Growth and Rhizosphere Colonization by Phytobeneficial Phenazine-Producing .

Rhizosphere colonization by phytobeneficial Pseudomonas spp. is pivotal in triggering their positive effects on plant health. Many Pseudomonas spp.

Exploiting Beneficial spp. for Cannabis Production.

Among the oldest domesticated crops, cannabis plants ( L., marijuana and hemp) have been used to produce food, fiber, and drugs for thousands of years. With the ongoing legalization of cannabis in several jurisdictions worldwide, a new high-value market is emerging for the supply of marijuana and hemp products.

Bridging the Gap: Type III Secretion Systems in Plant-Beneficial Bacteria.

Type III secretion systems (T3SSs) are bacterial membrane-embedded nanomachines translocating effector proteins into the cytoplasm of eukaryotic cells. They have been intensively studied for their important roles in animal and plant bacterial diseases. Over the past two decades, genome sequencing has unveiled their ubiquitous distribution in many taxa of Gram-negative bacteria, including plant-beneficial ones.

Complete Genome Sequences of Five Strains with Biocontrol Activity against Various Lettuce Pathogens.

Numerous bacterial strains from the Burkholderia cepacia complex display biocontrol activity. Here, we report the complete genome sequences of five strains isolated from soil. Biosynthetic gene clusters responsible for the production of antimicrobial compounds were found in the genome of these strains, which display biocontrol activity against various lettuce pathogens.

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.

Seasonal changes in the abundance and activity of bacterial and fungal denitrifying communities associated with different compost amendments.

Composts can be efficient organic amendments in potato culture as they can supply carbon and nutrients to the soil. However, more information is required on the effects of composts on denitrification and nitrous oxide emissions (NO) and emission-producing denitrifying communities. The effects of three compost amendments (municipal source separated organic waste compost (SSOC), forestry waste mixed with poultry manure compost (FPMC), and forestry residues compost (FRC)) on fungal and bacterial denitrifying communities and activity was examined in an agricultural field cropped to potatoes during the fall, spring, and summer seasons.

Interactions Between Spp., Spp. and Promote Plant Growth.

Plant growth-promoting rhizobacteria (PGPR) deploy several mechanisms to improve plant health, growth and yield. The aim of this study was to evaluate the efficacy of two spp. strains and three spp.

Comparative Genomics of Potato Common Scab-Causing spp. Displaying Varying Virulence.

Common scab of potato causes important economic losses worldwide following the development of necrotic lesions on tubers. In this study, the genomes of 14 prevalent scab-causing spp. isolated from Prince Edward Island, one of the most important Canadian potato production areas, were sequenced and annotated.

Biocontrol Activity of spp. and spp. Against and Other Cannabis Fungal Pathogens.

Gray mold caused by is one of the most widespread and damaging diseases in cannabis crops worldwide. With challenging restrictions on pesticide use and few effective control measures, biocontrol agents are needed to manage this disease. The aim of this study was to identify bacterial biocontrol agents with wide-spectrum activity against .

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.

Phloroglucinol Derivatives in Plant-Beneficial spp.: Biosynthesis, Regulation, and Functions.

Plant-beneficial spp. aggressively colonize the rhizosphere and produce numerous secondary metabolites, such as 2,4-diacetylphloroglucinol (DAPG). DAPG is a phloroglucinol derivative that contributes to disease suppression, thanks to its broad-spectrum antimicrobial activity.

Expression of Putative Defense Responses in Cannabis Primed by and/or Strains and Infected by .

Cannabis ( L.) offers many industrial, agricultural, and medicinal applications, but is commonly threatened by the gray mold disease caused by the fungus . With few effective control measures currently available, the use of beneficial rhizobacteria represents a promising biocontrol avenue for cannabis.

Genetic factors involved in rhizosphere colonization by phytobeneficial spp.

Plant growth-promoting rhizobacteria (PGPR) actively colonize the soil portion under the influence of plant roots, called the rhizosphere. Many plant-beneficial spp. have been characterized as PGPR.

Inoculation With the Plant-Growth-Promoting Rhizobacterium LBUM677 Impacts the Rhizosphere Microbiome of Three Oilseed Crops.

The bacterial communities inhabiting the rhizosphere play an important role in plant development and health. Here we studied the effect of inoculation with LBUM677, a plant growth promoting rhizobacterium that promotes seed oil accumulation, on the rhizosphere microbiome of three oilseed crops (, , and ) over time. Next-Generation high-throughput sequencing targeting the V4 region of 16S rDNA was used to characterize the microbial communities associated with the three different crops, inoculated or not with LBUM677, over a time period of up to 90 days post-inoculation.