The sperm structure and spermiogenesis of the heteropteran Coptosoma scutellatum (Geoffroy) with emphasis on the development of the centriole adjunct

Micron : the International Research and Review Journal for Microscopy
Glenda DiasRomano Dallai

Abstract

The sperm structure and spermiogenesis of the morphologically peculiar heteropteran Coptosoma scutellatum has been examined with electron microscopy. The sperm has a short monolayer acrosome, a cylindrical nucleus, a 9+9+2 axoneme and two mitochondrial derivatives with crystallized matrix. It shows the synapomorphies typical of the group, consisting of (a) two crystallized areas in the mitochondrial derivatives; (b) the presence of two bridges connecting the intertubular material of the flagellar axoneme to the flattened cisterns adhering to the inner sides of the mitochondrial derivatives; (c) the absence of accessory bodies. The most interesting feature is the presence, in the early spermatid, of an extended centriole adjunct material with the shape of a large ribbon-like structure. This material surrounds the posterior nuclear region and extends anteriorly along the nucleus. It is a microtubule-organizing-center (MTOC) producing the many microtubules surrounding the sperm components At the end of spermiogenesis, the centriole adjunct material modifies into two kidney-like structures accompanying the nuclear posterior end and surrounding the modified centriole.

References

Jun 1, 1977·The Journal of Cell Biology·B BaccettiB A Afzelius
Jan 1, 1985·Annual Review of Cell Biology·B R Brinkley
Apr 12, 2001·Current Opinion in Structural Biology·M Moritz, D A Agard
Jun 16, 2001·Biology of the Cell·G CallainiR Dallai
Dec 3, 2003·Cell Motility and the Cytoskeleton·Young OuJerome B Rattner
Jan 25, 2007·Nature Reviews. Molecular Cell Biology·Jens Lüders, Tim Stearns
Jan 6, 2009·Journal of Morphology·David MercatiRomano Dallai
Feb 7, 2009·Current Opinion in Cell Biology·Wallace F Marshall
Feb 23, 2010·Tissue & Cell·Maria Giovanna RiparbelliGiuliano Callaini
Sep 28, 2010·Current Biology : CB·Juliette Azimzadeh, Wallace F Marshall
Feb 1, 2011·Cell·Daiju KitagawaMichel O Steinmetz
Mar 8, 2011·Micron : the International Research and Review Journal for Microscopy·Vinícius Albano AraújoJosé Eduardo Serrão
Oct 14, 2011·Nature Reviews. Molecular Cell Biology·Justin M KollmanDavid A Agard
Jan 19, 2012·PloS One·Eileen O'TooleThomas Müller-Reichert
Apr 16, 2014·Arthropod Structure & Development·Romano Dallai

❮ Previous
Next ❯

Citations

Apr 26, 2017·Arthropod Structure & Development·Ademária M NovaisJosé Lino-Neto

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.