Certain Aspects of the Centriole Adjunct, Spermiogenesis, and the Mature Sperm of Insects

Breland, Osmond P.; Gassner, George; Riess, R.W.; Biesele, John J.

doi:10.1139/g66-091

Cited by 51 publications

(27 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, in a few spermatid axonemes two microtubules were seen to be positioned outside the nine axonemal doublets. This may be the result of an abortive formation of accessory tubules, similar to what occurs in 9+9+2 axonemes; this could possibly explain the claim by Breland et al (1966) that accessory tubules are present in the spermatozoa of Bittacus apicalis Hagen, 1861, a species of a genus which is believed to be taxonomically closely related to Panorpa. Possibly, all Mecoptera sperm have the potential to form accessory tubules, although they have secondarily lost these tubules (Dallai 1979).…”

Section: Discussionmentioning

confidence: 92%

Sperm structure of Mecoptera and Siphonaptera (Insecta) and the phylogenetic position of Boreus hyemalis

et al. 2003

View full text Add to dashboard Cite

Sperm ultrastructure has been studied in three species of the taxa Mecoptera and Siphonaptera. The spermatozoon of the scorpion fly Panorpa germanica shows an apical bilayered acrosome, a helicoidal nucleus, a centriolar region and a 9+2 flagellar axoneme helicoidally arranged around a long mitochondrial derivative. A second mitochondrial derivative is very short and present only in the centriolar region. A single accessory body is present and it is clearly formed as a prolongation of the centriole adjunct material. Two lateral lamellae run parallel to the nucleus. The snow fly Boreus hyemalis has a conventional sperm structure and shows a bilayered acrosome, a long nucleus, a centriolar region, two mitochondrial derivatives and two accessory bodies. The axoneme is of the 9+2 type and is flattened at the tail tip. Both P. germanica and B. hyemalis have two longitudinal extra-axonemal rods and have a glycocalyx consisting of longitudinal parallel ridges or filaments. The spermatozoon of the flea Ctenocephalides canis has a long apical bilayered acrosome, a nucleus, a centriolar region, a 9+2 axoneme wound around two unequally sized mitochondrial derivatives, and two triangular accessory bodies. In the posterior tail end the flagellar axoneme disorganises and a few microtubular doublets run helicoidally around the remnant mitochondrial derivative. The glycocalyx consists of fine transverse striations. In all three species, the posterior tail tip is characterised by a dense matrix embedding the disorganised axoneme. From this comparative analysis of the sperm structure it is concluded that Mecoptera, as traditionally defined, is monophyletic and that B. hyemalis is a member of Mecoptera rather than of Siphonaptera.

show abstract

Section: Discussionmentioning

confidence: 92%

Sperm structure of Mecoptera and Siphonaptera (Insecta) and the phylogenetic position of Boreus hyemalis

et al. 2003

View full text Add to dashboard Cite

show abstract

“…During spermiogenesis in A. lavicollis, the centriole adjunct is organized by the accumulation of electron-dense material around the centriole and extends posteriorly to be a partial sheath on the outside of the mitochondrial derivatives in mature spermatozoa. In several species of mosquitoes the centriole adjunct decreases in size during spermiogenesis, but it still remains as a relatively small and very dense structure in mature sperm (Breland et al, 1966). A centriole adjunct similar to that found in A. lavicollis sperm was described in R. unicoior sperm (Lee and Lee,199 1).…”

Section: Discussionmentioning

confidence: 84%

“…As its position corresponds to that of the connecting piece in mammalian spermatozoa, it was proposed that it might serve to secure the flagellum to the sperm head (Breland et al, 1966;Phillips, 1970). It is reported that in T. molitor, the accessory bodies of the axoneme endow the flagellum with complex movements (Baccetti et al, 1973).…”

Section: Discussionmentioning

confidence: 99%

“…Anopbeles punctipennis, Culiseta inornata, Culex OsO,, specimens were dehydrated and embedded in molestus, Psorophoracyanescens, Breland et al, 1966; Quetol 81 2. Thin sections were made with a Sorvall drone honey bee: Apis mellifera, Hoage and Kessel, ultra-microtome MT-2 and observed under a JEOL 1968;locust: Locusta migratoria, Cantacuzene, 1970; 1200A electron microscope.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Spermiogenesis in the stag beetle,Aegus lavicollisWaterhouse (Coleoptera, Lucanidae), with special reference to the centriole adjunct

Kubo-Irie¹,

Miura²,

Irie

et al. 2000

Invertebrate Reproduction & Development

View full text Add to dashboard Cite

Ultrastructural changes during spermiogenesis in the stag beetle, Aegus lavicollis, were studied with special attention to the organizing process of the centriole adjunct. In early spermatids the formation of acrosome and flagellum occurs simultaneously in the cytoplasm before nuclear condensation. The centriole adjunct first appears as a sheath surrounding a centriole in a concavity of the nucleus from which the flagellar axoneme is organized. A mass of electrondense material accumulates progressively in the vicinity of the centriole. As nuclear transformation proceeds, electron-dense material is found at the posterior end ofthe nucleus and extends beyond the centriolar region to form a partial sheath around mitochondrial derivatives. Electron-dense material seems to contribute to the formation of the centriole adjunct because the former is closely attached to the latter until the latter is completely formed. In mature spermatozoa the centriole adjunct is characterized by its peculiar disposition, extending across about half the length of the flagellum and partly covering the outside of two mitochondrial derivatives.

show abstract

“…T h e centriole adjunct is a subcellular structure which occurs in a variety of insects (Bertaud and Gatenby, 1960;Breland, Gassner, Riess and Biesele, 1966;Baccetti, Dallai and Rosati, 19693;Baccetti, Dallai, and Rosati, 1969b;Gatenby and Tahmisian, 1959;Phillips, 1970;Shay and Biesele, 1968). T h e term centriole adjunct, abbreviated for the remainder of this paper as CA, was chosen to describe the structure which in the mature sperm surrounds asymmetrically the bases of the mitochondria1 derivatives and axial filament complex where the structures attach to the base of the nucleus.…”

Section: Introductionmentioning

confidence: 99%

CENTRIOLE ADJUNCT DEVELOPMENT IN THE COCKROACH, EUBLABERUS POSTICUS

Lindsey¹,

Biesele²

1970

Can. J. Genet. Cytol.

Self Cite

View full text Add to dashboard Cite

show abstract

Certain Aspects of the Centriole Adjunct, Spermiogenesis, and the Mature Sperm of Insects

Cited by 51 publications

References 16 publications

Sperm structure of Mecoptera and Siphonaptera (Insecta) and the phylogenetic position of Boreus hyemalis

Sperm structure of Mecoptera and Siphonaptera (Insecta) and the phylogenetic position of Boreus hyemalis

Spermiogenesis in the stag beetle,Aegus lavicollisWaterhouse (Coleoptera, Lucanidae), with special reference to the centriole adjunct

CENTRIOLE ADJUNCT DEVELOPMENT IN THE COCKROACH, EUBLABERUS POSTICUS

Contact Info

Product

Resources

About