Multifaceted interactions between the pseudomonads and insects: mechanisms and prospects

Teoh, Miao-Ching; Furusawa, Go; Singham, G Veera

doi:10.1007/s00203-021-02230-9

Cited by 18 publications

(12 citation statements)

References 154 publications

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“…1, Table 1)-deserve further examination on its potential to enhance consumption of pollen from different plant sources. Likewise, Pseudomonas could somehow support the monophagous feeding habit of B. matronalis [45]. Notably, we did not find bacterial genera (e.g., Buchnerarelated symbionts) previously identified in the bacteriome of Dasytes, a specialized genus of pollen-feeding beetles [46].…”

contrasting

confidence: 47%

Uncovering Active Bacterial Symbionts in Three Species of Pollen-feeding Beetles (Nitidulidae: Meligethinae)

Mancini

Sabatelli

et al. 2022

Microb Ecol

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Microbial symbionts enable many phytophagous insects to specialize on plant-based diets through a range of metabolic services. Pollen comprises one-plant tissue consumed by such herbivores. While rich in lipids and proteins, its nutrient content is often imbalanced and difficult-to-access due to a digestibly recalcitrant cell wall. Pollen quality can be further degraded by harmful allelochemicals. To identify microbes that may aid in palynivory, we performed cDNA-based 16S rRNA metabarcoding on three related pollen beetles (Nitidulidae: Meligethinae) exhibiting different dietary breadths: Brassicogethes aeneus, B. matronalis, and Meligethes atratus. Nine bacterial symbionts (i.e., 97% OTUs) exhibited high metabolic activity during active feeding. Subsequent PCR surveys revealed varying prevalence of those from three Rickettsialles genera-Lariskella, Rickettsia, and Wolbachia-within beetle populations. Our findings lay the groundwork for future studies on the influence of phylogeny and diet on palynivorous insect microbiomes, and roles of symbionts in the use of challenging diets. KeywordsSymbiont • Pollen • Beetle • Phytophagous • Host-plant specialization Many phytophagous insects harbor symbiotic microorganisms that play fundamental roles in their host-plant * Emiliano Mancini

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confidence: 47%

Uncovering Active Bacterial Symbionts in Three Species of Pollen-feeding Beetles (Nitidulidae: Meligethinae)

Mancini

Sabatelli

et al. 2022

Microb Ecol

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“…are biosurfactants. In particular, orfamides, consisting of 10 amino acids and a 3-hydroxydodecanoic or tetradecanoic acid tail, show strong biosurfactant activity and anti-aphid insecticidal activity both by oral and external application through the cuticle [ 47 , 48 , 49 , 50 ]. The aphicidal activity of Bacillus spp.…”

Section: Cyclic Lipopeptide Surfactantsmentioning

confidence: 99%

Microbial Toxins in Insect and Nematode Pest Biocontrol

Subbaiah

2021

IJMS

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Invertebrate pests, such as insects and nematodes, not only cause or transmit human and livestock diseases but also impose serious crop losses by direct injury as well as vectoring pathogenic microbes. The damage is global but greater in developing countries, where human health and food security are more at risk. Although synthetic pesticides have been in use, biological control measures offer advantages via their biodegradability, environmental safety and precise targeting. This is amply demonstrated by the successful and widespread use of Bacillusthuringiensis to control mosquitos and many plant pests, the latter by the transgenic expression of insecticidal proteins from B. thuringiensis in crop plants. Here, I discuss the prospects of using bacterial and fungal toxins for pest control, including the molecular basis of their biocidal activity.

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“…Insects are long-known to have established various relationships with symbiotic bacteria, whereby the insect host depends on the bacteria for sustaining different life aspects such as protection against pathogens 1 and parasitism 2 , nutrition provisioning 3 , and modulating host behaviour 4 . This relationship enables host’s adaptive radiation into a new niche that would be inaccessible without the symbiont 5 , 6 .…”

Section: Introductionmentioning

confidence: 99%

Bacterial symbionts influence host susceptibility to fenitrothion and imidacloprid in the obligate hematophagous bed bug, Cimex hemipterus

Soh

Singham

2022

Sci Rep

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The use of insecticides remains important in managing pest insects. Over the years, many insects manifested physiological and behavioral modifications resulting in reduced efficacy of insecticides targeted against them. Emerging evidence suggests that bacterial symbionts could modulate susceptibility of host insects against insecticides. Here, we explore the influence of host microbiota in affecting the susceptibility of insect host against different insecticides in the blood-sucking bed bug, Cimex hemipterus. Rifampicin antibiotic treatment resulted in increased susceptibility to fenitrothion and imidacloprid, but not against deltamethrin. Meanwhile, the host fitness parameters measured in the present study were not significantly affected by rifampicin treatment, suggesting the role of bacterial symbionts influencing susceptibility against the insecticides. 16S metagenomics sequencing revealed a drastic shift in the composition of several bacterial taxa following rifampicin treatment. The highly abundant Alphaproteobacteria (Wolbachia > 90%) and Gammaproteobacteria (Yersinia > 6%) in control bed bugs were significantly suppressed and replaced by Actinobacteria, Bacilli, and Betaproteobacteria in the rifampicin treated F1 bed bugs, suggesting possibilities of Wolbachia mediating insecticide susceptibility in C. hemipterus. However, no significant changes in the total esterase, GST, and P450 activities were observed following rifampicin treatment, indicating yet unknown bacterial mechanisms explaining the observed phenomena. Re-inoculation of microbial content from control individuals regained the tolerance of rifampicin treated bed bugs to imidacloprid and fenitrothion. This study provides a foundation for a symbiont-mediated mechanism in influencing insecticide susceptibility that was previously unknown to bed bugs.

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Multifaceted interactions between the pseudomonads and insects: mechanisms and prospects

Cited by 18 publications

References 154 publications

Uncovering Active Bacterial Symbionts in Three Species of Pollen-feeding Beetles (Nitidulidae: Meligethinae)

Uncovering Active Bacterial Symbionts in Three Species of Pollen-feeding Beetles (Nitidulidae: Meligethinae)

Microbial Toxins in Insect and Nematode Pest Biocontrol

Bacterial symbionts influence host susceptibility to fenitrothion and imidacloprid in the obligate hematophagous bed bug, Cimex hemipterus

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