Symbiotic bacteria associated with gut symbiotic organs and female genital accessory organs of the leaf beetle Bromius obscurus (Coleoptera: Chrysomelidae)

Fukumori, Kayoko; Koga, Ryuichi; Nikoh, Naruo; Fukatsu, Takema

doi:10.1007/s13355-017-0513-0

Cited by 13 publications

(12 citation statements)

References 56 publications

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“…In several insect groups, including leaf beetles, four gastric ceca have been reported to function as symbiotic organs: four voluminous gastric ceca harboring the symbiotic bacteria Macropleicola spp. in larvae of Donaciinae leaf beetles ( 15 , 23 ), four round gastric ceca hosting symbiotic bacteria in larvae of a Bromius leaf beetle ( 16 , 21 ), four voluminous gastric ceca populated by the symbiotic fungi Symbiotaphrina spp. in larvae of Anobiinae drugstore beetles ( 14 , 17 ), and four round gastric ceca containing the symbiotic bacterium Erwinia dacicola in larvae of the olive fly Bactocera oleae ( 18 , 56 ).…”

Section: Discussionmentioning

confidence: 99%

Evolutionary Dynamics of Host Organs for Microbial Symbiosis in Tortoise Leaf Beetles (Coleoptera: Chrysomelidae: Cassidinae)

Fukumori

Oguchi

Ikeda

et al. 2022

mBio

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Insects represent the biodiversity of the terrestrial ecosystem, and their prosperity is attributable to their association with symbiotic microorganisms. By sequestering microbial functionality into their bodies, organs, tissues, or cells, diverse insects have successfully exploited otherwise inaccessible ecological niches and resources, including herbivory enabled by utilization of indigestible plant cell wall components. In leaf beetles of the subfamily Cassininae, an ancient symbiont lineage, Stammera , whose genome is extremely reduced and specialized for encoding pectin-degrading enzymes, is hosted in gut-associated symbiotic organs and contributes to the host’s food plant digestion.

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Section: Discussionmentioning

confidence: 99%

Evolutionary Dynamics of Host Organs for Microbial Symbiosis in Tortoise Leaf Beetles (Coleoptera: Chrysomelidae: Cassidinae)

Fukumori

Oguchi

Ikeda

et al. 2022

mBio

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“…Other studies in leaf beetles have shown a phylogenetic linkage between the host and foregut‐inhabiting, extracellular symbionts (Fukumori, Koga, Nikoh, & Fukatsu, ; Kölsch & Pedersen, ). Specifically, evidence for cospeciation has been found in the chrysomelid subfamilies Cassidinae, Eumolpinae, Sagrinae, and Donaciinae (Fukumori et al, ; Kölsch & Synefiaridou, ; Salem et al, ). Whether a symbiosis similar to Stammera is present in all subfamilies or beetle lineages remains unclear.…”

Section: Herbivore Co‐option Of Gut‐associated Bacteria To Facilitatementioning

confidence: 93%

Co‐option of microbial associates by insects and their impact on plant–folivore interactions

Mason

Jones

Felton

2018

Plant Cell & Environment

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Plants possess a suite of traits that make them challenging to consume by insect herbivores. Plant tissues are recalcitrant, have low levels of protein, and may be well defended by chemicals. Insects use diverse strategies for overcoming these barriers, including co-opting metabolic activities from microbial associates. In this review, we discuss the co-option of bacteria and fungi in the herbivore gut. We particularly focus upon chewing, folivorous insects (Coleoptera and Lepidoptera) and discuss the impacts of microbial co-option on herbivore performance and plant responses. We suggest that there are two components to microbial co-option: fixed and plastic relationships. Fixed relationships are involved in integral dietary functions and can be performed by microbial enzymes co-opted into the genome or by stably transferred associates. In contrast, the majority of gut symbionts appear to be looser and perform more facultative, context-dependent functions. This more plastic, variable co-option of bacteria likely produces a greater number of insect phenotypes, which interact differently with plant hosts. By altering plant detection of herbivory or mediating insect interactions with plant defensive compounds, microbes can effectively improve herbivore performance in real time within and between generations.

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“…As for weevils, an ancient gammaproteobacterial endosymbiont clade, Nardonella spp., found in diverse weevils ( 24 , 25 ), a gammaproteobacterial endosymbiont, Sodalis pierantonius , that presumably replaced the original Nardonella endosymbiont in the lineage of grain weevils of the genus Sitophilus ( 26 , 27 ), and another gammaproteobacterial endosymbiont, Curculioniphilus buchneri , that also replaced the original Nardonella endosymbiont in the lineage of acorn weevils of the genus Curculio and allied species ( 28 – 30 ), have been described. As for leaf beetles, a gammaproteobacterial endosymbiont clade, Macropleicola spp., associated with reed beetles of the subfamily Donaciinae ( 31 – 33 ), and several other gammaproteobacterial endosymbionts ( 34 , 35 ) have been reported.…”

Section: Introductionmentioning

confidence: 99%

A Novel, Extremely Elongated, and Endocellular Bacterial Symbiont Supports Cuticle Formation of a Grain Pest Beetle

Hirota

Okude

Anbutsu

et al. 2017

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The saw-toothed grain beetle, Oryzaephilus surinamensis (Silvanidae), is a cosmopolitan stored-product pest. Early studies on O. surinamensis in the 1930s described the presence of peculiar bacteriomes harboring endosymbiotic bacteria in the abdomen. Since then, however, the microbiological nature of the symbiont has been elusive. Here we investigated the endosymbiotic system of O. surinamensis in detail. In the abdomen of adults, pupae, and larvae, four oval bacteriomes were consistently identified, whose cytoplasm was full of extremely elongated tubular bacterial cells several micrometers wide and several hundred micrometers long. Molecular phylogenetic analysis identified the symbiont as a member of the Bacteroidetes, in which the symbiont was the most closely related to the endosymbiont of a grain pest beetle, Rhyzopertha dominica (Bostrichidae). The symbiont was detected in developing embryos, corroborating vertical symbiont transmission through host generations. The symbiont gene showed AT-biased nucleotide composition and accelerated molecular evolution, plausibly reflecting degenerative evolution of the symbiont genome. When the symbiont infection was experimentally removed, the aposymbiotic insects grew and reproduced normally, but exhibited a slightly but significantly more reddish cuticle and lighter body mass. These results indicate that the symbiont of O. surinamensis is not essential for the host’s growth and reproduction but contributes to the host’s cuticle formation. Symbiont genome sequencing and detailed comparison of fitness parameters between symbiotic and aposymbiotic insects under various environmental conditions will provide further insights into the symbiont’s biological roles for the stored-product pest.

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Symbiotic bacteria associated with gut symbiotic organs and female genital accessory organs of the leaf beetle Bromius obscurus (Coleoptera: Chrysomelidae)

Cited by 13 publications

References 56 publications

Evolutionary Dynamics of Host Organs for Microbial Symbiosis in Tortoise Leaf Beetles (Coleoptera: Chrysomelidae: Cassidinae)

Evolutionary Dynamics of Host Organs for Microbial Symbiosis in Tortoise Leaf Beetles (Coleoptera: Chrysomelidae: Cassidinae)

Co‐option of microbial associates by insects and their impact on plant–folivore interactions

A Novel, Extremely Elongated, and Endocellular Bacterial Symbiont Supports Cuticle Formation of a Grain Pest Beetle

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