Gut symbionts of a hemipteran insect,Riptortus pedestris, play essential roles in juvenile hormone-mediated host development and reproduction

2016 ◽  
Author(s):  
Jun Beom Lee
Keyword(s):  
Juvenile Hormone ◽  
Riptortus Pedestris ◽  
Gut Symbionts ◽  
Hemipteran Insect ◽  
Host Development

Juvenile hormone I is the principal juvenile hormone in a hemipteran insect,Riptortus clavatus

1992 ◽  
Vol 48 (6) ◽  
pp. 606-610 ◽  
Author(s):  
H. Numata ◽  
A. Numata ◽  
C. Takahashi ◽  
Y. Nakagawa ◽  
K. Iwatani ◽  
...  
Keyword(s):  
Juvenile Hormone ◽  
Riptortus Clavatus ◽  
Juvenile Hormone I ◽  
Hemipteran Insect

scholarly journals In their sister’s footsteps: Taxonomic divergence obscures substantial functional overlap among the metabolically diverse symbiotic gut communities of adult and larval turtle ants

2021 ◽  
Author(s):  
Benoît Béchade ◽  
Yi Hu ◽  
Jon G. Sanders ◽  
Christian S. Cabuslay ◽  
Piotr Łukasik ◽  
...  
Keyword(s):  
Sulfur Metabolism ◽  
Nutritional Ecology ◽  
Bacterial Symbionts ◽  
Ant Colonies ◽  
Food Particles ◽  
Gut Symbionts ◽  
Key Aspects ◽  
First Time ◽  
Host Development

AbstractGut bacterial symbionts can support animal nutrition by facilitating digestion and providing valuable metabolites. While the composition of gut symbiont communities shifts with host development in holometabolous insects, changes in symbiotic roles between immature and adult stages are not well documented, especially in ants. Here, we explored the metabolic capabilities of microbiomes sampled from herbivorous turtle ant (Cephalotes sp.) larvae and adult workers through genomic and metagenomic screenings and targeted in vitro metabolic assays. We reveal that larval guts harbor bacterial symbionts from the Enterobacteriales, Lactobacillales and Rhizobiales orders, with impressive metabolic capabilities, including catabolism of plant and fungal recalcitrant fibers common in turtle ant diets, and energy-generating fermentation. Additionally, several members of the specialized turtle ant adult gut microbiome, sampled downstream of an anatomical barrier that dams large food particles, show a conserved potential to depolymerize many dietary fibers and other carbohydrates. Symbionts from both life stages have the genomic capacity to recycle nitrogen, synthesize amino acids and B-vitamins, and perform several key aspects of sulfur metabolism. We also document, for the first time in ants, an adult-associated Campylobacterales symbiont with an apparent capacity to anaerobically oxidize sulfide, reduce nitrate, and fix carbon dioxide. With help of their gut symbionts, including several bacteria likely acquired from the environment, turtle ant larvae appear as an important component of turtle ant colony digestion and nutrition. In addition, the conserved nature of the digestive, energy-generating, and nutritive capacities among adult-enriched symbionts suggests that nutritional ecology of turtle ant colonies has long been shaped by specialized, behaviorally-transferred gut bacteria with over 46 million years of residency.

Burkholderia gut symbiont modulates titer of specific juvenile hormone in the bean bug Riptortus pedestris

2019 ◽  
Vol 99 ◽  
pp. 103399 ◽  
Author(s):  
Junbeom Lee ◽  
Chan-Hee Kim ◽  
Ho Am Jang ◽  
Jiyeun Kate Kim ◽  
Toyomi Kotaki ◽  
...  
Keyword(s):  
Juvenile Hormone ◽  
Riptortus Pedestris ◽  
Bean Bug

Burkholderia gut symbionts enhance the innate immunity of host Riptortus pedestris

2015 ◽  
Vol 53 (1) ◽  
pp. 265-269 ◽  
Author(s):  
Jiyeun Kate Kim ◽  
Jun Beom Lee ◽  
Ye Rang Huh ◽  
Ho Am Jang ◽  
Chan-Hee Kim ◽  
...  
Keyword(s):  
Innate Immunity ◽  
Riptortus Pedestris ◽  
Gut Symbionts

scholarly journals Ovicidal activity of juvenile hormone mimics in the bean bug, Riptortus pedestris

2021 ◽  
Vol 46 (1) ◽  
pp. 60-67
Author(s):  
Shouya Naruse ◽  
Mayuko Ogino ◽  
Takao Nakagawa ◽  
Yoko Yasuno ◽  
Akiya Jouraku ◽  
...  
Keyword(s):  
Juvenile Hormone ◽  
Ovicidal Activity ◽  
Riptortus Pedestris ◽  
Bean Bug ◽  
Juvenile Hormone Mimics

scholarly journals Juvenile hormone III skipped bisepoxide, not its stereoisomers, as a juvenile hormone of the bean bug Riptortus pedestris

2020 ◽  
Vol 289 ◽  
pp. 113394 ◽  
Author(s):  
Yumi Ando ◽  
Keiji Matsumoto ◽  
Kumi Misaki ◽  
Genyu Mano ◽  
Sakiko Shiga ◽  
...  
Keyword(s):  
Juvenile Hormone ◽  
Juvenile Hormone Iii ◽  
Riptortus Pedestris ◽  
Bean Bug

scholarly journals Multiple Precursor Proteins of Thanatin Isoforms, an Antimicrobial Peptide Associated With the Gut Symbiont of Riptortus pedestris

2022 ◽  
Vol 12 ◽  
Author(s):  
Junbeom Lee ◽  
Wook Hyun Cha ◽  
Dae-Weon Lee
Keyword(s):  
Antimicrobial Peptide ◽  
Bacterial Infections ◽  
Membrane Attack Complex ◽  
Expression Levels ◽  
Bacterial Symbiosis ◽  
Cdna Sequences ◽  
Riptortus Pedestris ◽  
Precursor Proteins ◽  
Gut Symbionts

Thanatin is an antimicrobial peptide (AMP) generated by insects for defense against bacterial infections. In the present study, we performed cDNA cloning of thanatin and found the presence of multiple precursor proteins from the bean bug, Riptortus pedestris. The cDNA sequences encoded 38 precursor proteins, generating 13 thanatin isoforms. In the phylogenetic analysis, thanatin isoforms were categorized into two groups based on the presence of the membrane attack complex/perforin (MACPF) domain. In insect-bacterial symbiosis, specific substances are produced by the immune system of the host insect and are known to modulate the symbiont’s population. Therefore, to determine the biological function of thanatin isoforms in symbiosis, the expression levels of three AMP genes were compared between aposymbiotic insects and symbiotic R. pedestris. The expression levels of the thanatin genes were significantly increased in the M4 crypt, a symbiotic organ, of symbiotic insects upon systemic bacterial injection. Further, synthetic thanatin isoforms exhibited antibacterial activity against gut-colonized Burkholderia symbionts rather than in vitro-cultured Burkholderia cells. Interestingly, the suppression of thanatin genes significantly increased the population of Burkholderia gut symbionts in the M4 crypt under systemic Escherichia coli K12 injection. Overgrown Burkholderia gut symbionts were observed in the hemolymph of host insects and exhibited insecticidal activity. Taken together, these results suggest that thanatin of R. pedestris is a host-derived symbiotic factor and an AMP that controls the population of gut-colonized Burkholderia symbionts.

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