Pseudomonas entomophila: A Versatile Bacterium with Entomopathogenic Properties

Dieppois, Guennaëlle; Opota, Onya; Lalucat, Jorge; Lemaître, Bruno

doi:10.1007/978-94-017-9555-5_2

Cited by 30 publications

(37 citation statements)

References 96 publications

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“…The insecticidal properties of nonspore-forming bacteria to insects often vary upon their capability to enter, persist, and survive in the gut physicochemical conditions and be protected from the gut immune defense system as well. Thus, the excretion of toxic substances may disrupt the host's physiology (Dieppois et al, 2015). Obtained results indicate that the strains B. weihenstephanensis and Pseudomonas sp.…”

Section: Molecular Identification Of the Most Bioactive Bacterial Isomentioning

confidence: 93%

“…showed significant efficacy in controlling locust nymphs. Moreover, they displayed specific characteristic features of sepsis that appeared in thinning out of the internals and body skeletal, often with a specific rancid smell (Dieppois et al, 2015). The mortality rate of L. migratoria infected with Pseudomonas sp.…”

Section: Molecular Identification Of the Most Bioactive Bacterial Isomentioning

confidence: 99%

“…A unique sepsis characterization resulted from infected locusts with Pseudomonas sp. was displayed as fetid smell along with disruption of internal gut (Dieppois et al, 2015). Therefore, Pseudomonas spp.…”

Section: Molecular Identification Of the Most Bioactive Bacterial Isomentioning

confidence: 99%

“…P. entomophila exhibited unique pathogenic characterization to lepidopteran, dipteran, and coleopteran insects (Vallet-Gely et al, 2010). Usually, the insecticidal characteristics of non-spore forming bacteria to insects depend on the capability of the entomopathogen to enter, survive, persist in mid-gut physicochemical conditions and immune defenses, and excrete toxic substances that disrupt host physiology (Dieppois, et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Phylogenetic characteristics of novel Bacillus weihenstephanensis and Pseudomonas sp. to desert locust, Schistocerca gregaria Forskål (Orthoptera: Acrididae)

Mashtoly

El-Zemaity

Abolmaaty

et al. 2019

Egypt J Biol Pest Control

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Thirty bacterial isolates were isolated from the gut contents of diseased/dead locust. Their pathogenicity was tested against 4th instar nymphs of desert locust, Schistocerca gregaria Forskål (Orthoptera: Acrididae). Two isolates, designated DL2 and DL6, out of thirty showed the highest insecticidal activities against locust nymphs in preliminary bracketing. They were bioassayed via leaf dip and per os techniques and toxicity was determined using SAS program. The insecticidal activity of DL6 was more than DL2, whereas LC 50 's values of 35 × 10 6 and 13 × 10 6 cfu's/ml were determined for DL2 and DL6, respectively, after 48 h of leaf-dip treatment. However, LD 50 's value of 53 × 10 6 and 26 × 10 6 cfu's/ml was determined for DL2 and DL6, respectively, after 24 h of per os treatment. The relative potencies of DL6 to DL2 were (2.6 and 2.03) folds in leaf-dip and per os treatments, respectively. Biochemical characterization was conducted, using GEN III MicroPlate™ Biolog identification system and confirmed with molecular identification via 16S rDNA gene sequencing. Nucleotide sequencing of each was submitted to a gene bank and an accession number was generated for each isolate. Obtained bacterial strains DL2 and DL6 were identified as Bacillus weihenstephanensis (KY630645) and Pseudomonas sp. (KY630649), with a similarity of 100 and 75% to B. weihenstephanensis strain PHCDB9 (NR_024697) and Pseudomonas sp. strain DSM11821 (KF417541), respectively. The tested strains proved their potential to be bio-pesticide agents involved in controlling desert locust nymphs.

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Section: Molecular Identification Of the Most Bioactive Bacterial Isomentioning

confidence: 93%

Section: Molecular Identification Of the Most Bioactive Bacterial Isomentioning

confidence: 99%

Section: Molecular Identification Of the Most Bioactive Bacterial Isomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phylogenetic characteristics of novel Bacillus weihenstephanensis and Pseudomonas sp. to desert locust, Schistocerca gregaria Forskål (Orthoptera: Acrididae)

Mashtoly

El-Zemaity

Abolmaaty

et al. 2019

Egypt J Biol Pest Control

View full text Add to dashboard Cite

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“…157 However, the animal model species Caenorhabditis elegans, recognizes P. aeruginosa pyochelin (42) through chemosensory detection by GPCRs (G protein-coupled receptors) resulting in pathogen avoidance and host survival. 158 Noteworthy, many plant pathogens, 123 and insect pathogens 159,160 rely on the production of siderophores to cause full disease in their hosts. In agreement with their ability to modulate behaviour in C. elegans, siderophores not only act as virulence factors, they can also be perceived by the host triggering a variety of responses in an iron-dependent and -independent manner.…”

Section: Stimulatory Compoundsmentioning

confidence: 99%

Microbial small molecules – weapons of plant subversion

et al. 2018

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Covering: up to 2018 Plants live in close association with a myriad of microbes that are generally harmless. However, the minority of microbes that are pathogens can severely impact crop quality and yield, thereby endangering food security. By contrast, beneficial microbes provide plants with important services, such as enhanced nutrient uptake and protection against pests and diseases. Like pathogens, beneficial microbes can modulate host immunity to efficiently colonize the nutrient-rich niches within and around the roots and aerial tissues of a plant, a phenomenon mirroring the establishment of commensal microbes in the human gut. Numerous ingenious mechanisms have been described by which pathogenic and beneficial microbes in the plant microbiome communicate with their host, including the delivery of immune-suppressive effector proteins and the production of phytohormones, toxins and other bioactive molecules. Plants signal to their associated microbes via exudation of photosynthetically fixed carbon sources, quorum-sensing mimicry molecules and selective secondary metabolites such as strigolactones and flavonoids. Molecular communication thus forms an integral part of the establishment of both beneficial and pathogenic plant-microbe relations. Here, we review the current knowledge on microbe-derived small molecules that can act as signalling compounds to stimulate plant growth and health by beneficial microbes on the one hand, but also as weapons for plant invasion by pathogens on the other. As an exemplary case, we used comparative genomics to assess the small molecule biosynthetic capabilities of the Pseudomonas genus; a genus rich in both plant pathogenic and beneficial microbes. We highlight the biosynthetic potential of individual microbial genomes and the population at large, providing evidence for the hypothesis that the distinction between detrimental and beneficial microbes is increasingly fading. Knowledge on the biosynthesis and molecular activity of microbial small molecules will aid in the development of successful biological agents boosting crop resiliency in a sustainable manner and could also provide scientific routes to pathogen inhibition or eradication.

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