Spermiogenesis of the hangingfly Terrobittacus implicatus (Huang and Hua) (Mecoptera: Bittacidae)

Miao, Yanli; Liu, Bing-Peng; Hua, Bao‐Zhen

doi:10.1007/s00709-019-01415-w

Cited by 7 publications

(4 citation statements)

References 38 publications

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“…The ovary of Terrobittacus consists of seven polytrophic ovarioles, and each vitellarium consists of five or six egg chambers, which comprises three nurse cells and one oocyte ( Yan 2018 ). Spermiogenesis and sperm ultrastructure support a reversal origin of the 9 + 2 flagellar axoneme in Mecoptera ( Miao et al 2019 ). The vasa deferentia differ considerably from those of Panorpidae ( Lyu and Hua 2019 ).…”

Section: Introductionmentioning

confidence: 89%

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Two new species of the genus Terrobittacus Tan & Hua, 2009 (Mecoptera, Bittacidae)

He¹,

Hua²

2023

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Two new species of Terrobittacus Tan & Hua, 2009 are described and illustrated from Sichuan and Guangxi provinces of China, increasing the species number of Terrobittacus to eight. Terrobittacus emeishanicussp. nov. is differentiated from its congeners by wings with distinct markings and a female subgenital plate with a V-shaped carina. Terrobittacus laoshanicussp. nov. can be recognized by the black terga VI–IX. A key to species of Terrobittacus is updated. The species distribution and the relationship between adult morphology and mating behavior were briefly discussed.

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Section: Introductionmentioning

confidence: 89%

“…The vasa deferentia differ considerably from those of Panorpidae ( Lyu and Hua 2019 ). Terrobittacus possesses the highest chromosome number ever observed in Bittacidae and an asymmetric karyotype ( Miao and Hua 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Two new species of the genus Terrobittacus Tan & Hua, 2009 (Mecoptera, Bittacidae)

He¹,

Hua²

2023

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“…In addition to axoneme and ectosomes, the assembly of extra-axonemal structures (EASs) occurs in many organisms ranging from mammals and insects ( Zhao et al., 2018 ; Miao et al., 2019 ) to protists, e.g., euglenozoa, dinoflagellates, and Giardia ( Portman and Gull, 2010 ; Maia-Brigagao et al., 2013 ; Moran et al., 2014 ). EASs are evolutionarily convergent, highly organized fibrillar structures that provide mechanical support and act as metabolic, homeostatic, and sensory platforms for the regulation of flagellar beating ( Portman and Gull, 2010 ; Moran et al., 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Ultrastructural and Functional Analysis of a Novel Extra-Axonemal Structure in Parasitic Trichomonads

Cóceres¹,

Iriarte²,

Miranda-Magalhães³

et al. 2021

Front. Cell. Infect. Microbiol.

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Trichomonas vaginalis and Tritrichomonas foetus are extracellular flagellated parasites that inhabit humans and other mammals, respectively. In addition to motility, flagella act in a variety of biological processes in different cell types, and extra-axonemal structures (EASs) have been described as fibrillar structures that provide mechanical support and act as metabolic, homeostatic, and sensory platforms in many organisms. It has been assumed that T. vaginalis and T. foetus do not have EASs. However, here, we used complementary electron microscopy techniques to reveal the ultrastructure of EASs in both parasites. Such EASs are thin filaments (3–5 nm diameter) running longitudinally along the axonemes and surrounded by the flagellar membrane, forming prominent flagellar swellings. We observed that the formation of EAS increases after parasite adhesion on the host cells, fibronectin, and precationized surfaces. A high number of rosettes, clusters of intramembrane particles that have been proposed as sensorial structures, and microvesicles protruding from the membrane were observed in the EASs. Our observations demonstrate that T. vaginalis and T. foetus can connect to themselves by EASs present in flagella. The protein VPS32, a member of the ESCRT-III complex crucial for diverse membrane remodeling events, the pinching off and release of microvesicles, was found in the surface as well as in microvesicles protruding from EASs. Moreover, we demonstrated that the formation of EAS also increases in parasites overexpressing VPS32 and that T. vaginalis-VPS32 parasites showed greater motility in semisolid agar. These results provide valuable data about the role of the flagellar EASs in the cell-to-cell communication and pathogenesis of these extracellular parasites.

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“…In addition to axoneme and ectosomes, the assembly of extra-axonemal structures (EASs) occurs in many organisms ranging from mammalian and insects (Miao et al, 2019;Zhao et al, 2018) to protists, e.g. euglenozoa, dinoflagellates and Giardia (Maia-Brigagao et al, 2013;Moran, 2014;Portman & Gull, 2010).…”

Section: Introductionmentioning

confidence: 99%

Ultrastructural and functional analysis of extra-axonemal structures in trichomonads

Cóceres

Iriarte

Miranda-Magalhães

et al. 2021

Preprint

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Trichomonas vaginalis and Tritrichomonas foetus are extracellular flagellated parasites that inhabit humans and other mammals, respectively. In addition to motility, flagella act in a variety of biological processes in different cell types; and extra-axonemal structures (EASs) has been described as fibrillar structures that provide mechanical support and act as metabolic, homeostatic and sensory platforms in many organisms. Here, we identified the presence of EASs forming prominent flagellar swellings in T. vaginalis and T. foetus and we observed that their formation was associated with the parasites adhesion on the host cells, fibronectin, and precationized surfaces; and parasite:parasite interaction. A high number of rosettes, clusters of intramembrane particles that has been proposed as sensorial structures, and microvesicles protruding from the membrane were observed in the EASs. The protein VPS32, a member of the ESCRT-III complex crucial for diverse membrane remodeling events, the pinching off and release of microvesicles, was found in the surface as well as in microvesicles protruding from EASs. Moreover, we demonstrated that overexpression of VPS32 protein induce EAS formation and increase parasite motility in semi-solid medium. These results provide valuable data about the role of the flagellar EASs in the cell-to-cell communication and pathogenesis of these extracellular parasites.

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Spermiogenesis of the hangingfly Terrobittacus implicatus (Huang and Hua) (Mecoptera: Bittacidae)

Cited by 7 publications

References 38 publications

Two new species of the genus Terrobittacus Tan & Hua, 2009 (Mecoptera, Bittacidae)

Two new species of the genus Terrobittacus Tan & Hua, 2009 (Mecoptera, Bittacidae)

Ultrastructural and Functional Analysis of a Novel Extra-Axonemal Structure in Parasitic Trichomonads

Ultrastructural and functional analysis of extra-axonemal structures in trichomonads

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Spermiogenesis of the hangingfly Terrobittacus implicatus (Huang and Hua) (Mecoptera: Bittacidae)

Cited by 7 publications

References 38 publications

﻿Two new species of the genus Terrobittacus Tan &amp; Hua, 2009 (Mecoptera, Bittacidae)

﻿Two new species of the genus Terrobittacus Tan &amp; Hua, 2009 (Mecoptera, Bittacidae)

Ultrastructural and Functional Analysis of a Novel Extra-Axonemal Structure in Parasitic Trichomonads

Ultrastructural and functional analysis of extra-axonemal structures in trichomonads

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Two new species of the genus Terrobittacus Tan & Hua, 2009 (Mecoptera, Bittacidae)

Two new species of the genus Terrobittacus Tan & Hua, 2009 (Mecoptera, Bittacidae)