The transposable element-rich genome of the cereal pest Sitophilus oryzae

BMC Biology, Год журнала: 2021, Номер 19(1)

Опубликована: Ноя. 9, 2021

The rice weevil Sitophilus oryzae is one of the most important agricultural pests, causing extensive damage to cereal in fields and stored grains. S. has an intracellular symbiotic relationship (endosymbiosis) with Gram-negative bacterium Sodalis pierantonius a valuable model decipher host-symbiont molecular interactions.We sequenced genome using combination short long reads produce best assembly for Curculionidae species date. We show that undergone successive bursts transposable element (TE) amplification, representing 72% genome. In addition, we many TE families are transcriptionally active, changes their expression associated insect endosymbiotic state. high gene expansion rate, when compared other beetles. Reconstruction metabolic networks revealed that, despite its recent association weevils (30 kyear), relies on host several amino acids nucleotides survive vitamins essential required development cuticle biosynthesis.Here present pest beetle, which may act as foundation control. be useful endosymbiosis, studying evolution regulation, along impact TEs eukaryotic genomes.

Язык: Английский

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Structural Design Variations in Beetle Elytra

Advanced Functional Materials, Год журнала: 2021, Номер 31(50)

Опубликована: Авг. 15, 2021

Abstract Beetles typically use their protective wing coverings or elytra to shield membranous hindwings from the environment. Elytra in some terrestrial species have evolved a greater role capable of shielding organism powerful antagonistic predators. The structure–function relationships these biological composites identify how architectural and chemical variations cuticle are tuned create light‐weight, impact resistant composites. Specifically, elytral structures tree dwelling beetle flight, Trypoxylus dichotomus , incapable Phloeodes diabolicus compared understand varied environmental needs forged facilitate fight resist fatal predator strikes. Mechanical microstructural analysis reveals P . has harder, stiffer that incorporate through‐thickness fibers mechanical stresses imposed by bending puncture. Conversely, T compliant structure with large voids facilitates localized deformation. Variations flexural strength puncture resistance remain attributed possessing thicker degree cross‐linking an increased amount endocuticular layers. These findings may provide useful insight into design manufacturing composite materials for light‐weight energy‐absorbing applications.

Язык: Английский

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The Hind Wing of Coleoptera (Insecta): Morphology, Nomenclature and Phylogenetic Significance. Part 1. General Discussion and Archostemata–Elateroidea

Annales Zoologici, Год журнала: 2021, Номер 71(3)

Опубликована: Сен. 30, 2021

The hind wings of all known families and most subfamilies Coleoptera are illustrated, annotated discussed utilising the terminology Kukalová-Peck Lawrence (2004), with a few changes in nomenclature suggested by senior author. beetle 21 groups, based on recent classifications Coleoptera. For each these works phylogeny classification reviewed, wing characters to determine if some features might support or refute relationships molecular morphological analyses. Part 1 includes general discussion structure divided into following sections: fields, veinal systems (including history nomenclature), folding, edge embayments, hinges bending zones, cross-veins braces, cells other landmarks. It is followed first 14 groups (Archostemata Elateroidea), 15 figures supporting discussions, 426 labelled images representing 380 genera.

Язык: Английский

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Loss of Timeless Underlies an Evolutionary Transition within the Circadian Clock

Molecular Biology and Evolution, Год журнала: 2021, Номер 39(1)

Опубликована: Дек. 2, 2021

Abstract Most organisms possess time-keeping devices called circadian clocks. At the molecular level, clocks consist of transcription–translation feedback loops (TTFLs). Although some components negative TTFL are conserved across animals, important differences exist between typical models, such as mouse and fruit fly. In Drosophila, key PERIOD (PER) TIMELESS (TIM-d) proteins, whereas mammalian clock relies on PER CRYPTOCHROME (CRY-m). Importantly, how has maintained functionality during evolutionary transitions different states remains elusive. Therefore, we systematically described gene setup in major bilaterian lineages identified marked lineage-specific their constitution. Then performed a thorough functional analysis linden bug Pyrrhocoris apterus, an insect species comprising features characteristic both Drosophila Unexpectedly, knockout timeless-d, essential for ticking did not compromise rhythmicity P. it only accelerated its pace. Furthermore, silencing timeless-m, ancestral timeless type ubiquitously present resulted mild gradual loss rhythmicity, supporting possible participation clock, which is consistent with timeless-m role suggested by research models. The dispensability timeless-d apterus allows drawing scenario remained at each step transition from state to TIM-d-independent + CRY-m system operating extant vertebrates, including humans.

Язык: Английский

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The leaf beetle Chelymorpha alternans propagates a plant pathogen in exchange for pupal protection

Current Biology, Год журнала: 2022, Номер 32(19), С. 4114 - 4127.e6

Опубликована: Авг. 19, 2022

Язык: Английский

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