scholarly journals Morphology and histology of the male reproductive system of Collaria oleosa (Distant, 1883) (Heteroptera: Miridae)

Bionatura ◽  
2020 ◽  
Vol 5 (2) ◽  
pp. 1122-1125
Author(s):  
Mayra Vélez ◽  
Glenda Dias ◽  
Irina Morales ◽  
Raul N. C. Guedes ◽  
José Lino-Neto
Keyword(s):  
Reproductive System ◽  
Vas Deferens ◽  
Seminal Vesicles ◽  
Male Reproductive System ◽  
General Morphology ◽  
Accessory Glands ◽  
New Information ◽  
Ejaculatory Bulb

Collaria oleosa (Distant, 1883) is a phytophagous bug often observed causing injuries in wheat, barley, and oat crops, besides grass pastures. The male reproductive system of C. oleosa has been studied anatomically and histologically. It consists of a pair of testes, each one with two follicles, one pair of seminal vesicles, two pairs of external accessory glands, and an ejaculatory bulb. The testicular follicles exhibit cysts with spermatogonia, spermatocytes, spermatids, and spermatozoa bundles. The testes are connected to the seminal vesicles by the vas deferens. The seminal vesicles are connected to the ejaculatory bulb and are bound by the accessory glands. In mirids belonging to the Stenodemini tribe, the general morphology of the male reproductive system is similar. However, two follicles per testis may be characteristic of the genus Collaria. The anatomy and histology of the male reproductive system in C. oleosa provides new information and also contributes to the understanding of the systematics of Stenodemini as well as the Miridae family in general.

scholarly journals A Glycoproteinaceous Secretion in the Seminal Vesicles of the Termite Coptotermes gestroi (Isoptera: Rhinotermitidae)

Insects ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 428
Author(s):  
Lara T. Laranjo ◽  
Ives Haifig ◽  
Ana Maria Costa-Leonardo
Keyword(s):  
Reproductive System ◽  
Periodic Acid ◽  
First Record ◽  
Distal Portion ◽  
Seminal Vesicles ◽  
Male Reproductive System ◽  
Periodic Acid Schiff ◽  
Accessory Glands ◽  
Primary Reproductives ◽  
Coptotermes Gestroi

Coptotermes gestroi is a subterranean termite with colonies generally headed by a pair of primary reproductives, although neotenics may occur. In this study, the male reproductive system was compared during different life stages of nymphs, alates, neotenic reproductives, and kings of C. gestroi, focusing on the modifications of this system along the maturation of these individuals. The structure of the male reproductive system follows the pattern described for insects, although C. gestroi males do not exhibit conspicuous penises and differentiated accessory glands. In kings, each testis consisted of about seven lobes, significantly increased in size as compared to younger males. The spermatogenesis begins in third-instar nymphs, which already presented spermatozoa in the testes. The seminal vesicles are individualized in C. gestroi and have a secretory distal portion and a proximal portion with a role in spermatozoa storage. The secretion of the seminal vesicles is strongly periodic acid Schiff (PAS)-positive, whereas the xylidine Ponceau test revealed proteins that increase in quantity while the males become older. This is the first record of glycoproteins in the lumen of seminal vesicles in termites. Further studies will clarify how they are produced and interact in the physiology and nutrition of the non-flagellate spermatozoa of C. gestroi.

scholarly journals The Sperm Structure and Spermatogenesis of Trypophloeus klimeschi (Coleoptera: Curculionidae: Scolytinae)

Biology ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 583
Author(s):  
Jing Gao ◽  
Guanqun Gao ◽  
Jiaxing Wang ◽  
Hui Chen
Keyword(s):  
Electron Microscopy ◽  
Golgi Apparatus ◽  
Reproductive System ◽  
Chromatin Condensation ◽  
Ejaculatory Duct ◽  
Seminal Vesicles ◽  
Male Reproductive System ◽  
Nuclear Chromatin ◽  
Accessory Glands ◽  
Close Phylogenetic Relationship

The male reproductive system, sperm structure, and spermatogenesis of Trypophloeusklimeschi (Coleoptera: Curculionidae: Scolytinae), which is one of the most destructive pests of Populus alba var. pyramidalis (Bunge), were investigated using light microscopy, scanning electron microscopy, and transmission electron microscopy. The male reproductive system of T.klimeschi is composed of testes, seminal vesicles, tubular accessory glands, multilobulated accessory glands, vasa deferentia, and a common ejaculatory duct. In spermatogenesis, two phenomena are apparent: The nuclear chromatin condenses into two different patterns, and an oval preacrosomal vesicle is present at the flank of the Golgi apparatus. The sperm are short, measuring 76.7 ± 1.8 μm in length, and are 508.1 ± 12.9 nm in width. The sperm are composed of a three-layer acrosomal complex, a cylindrical nucleus, two mitochondrial derivatives, a 9 + 9 + 2 axoneme, and two accessory bodies with a large “puff”-like expansion. Mature sperm are individually stored in seminal vesicles. During spermiogenesis, the similarities in the nuclear chromatin condensation characteristics of Curculioninae and Scolytinae are indicative of their close phylogenetic relationship. It appears that the preacrosomal vesicle being flanked by the Golgi apparatus is a characteristic of spermatogenesis in Curculionidae.

scholarly journals The Concept of Male Reproductive Anatomy

2021 ◽  
Author(s):  
Oyovwi Mega Obukohwo ◽  
Nwangwa Eze Kingsley ◽  
Rotu Arientare Rume ◽  
Emojevwe Victor
Keyword(s):  
Reproductive System ◽  
Reproductive Tract ◽  
Prostate Gland ◽  
Ejaculatory Duct ◽  
Seminal Vesicles ◽  
Female Reproductive Tract ◽  
Male Reproductive System ◽  
Male Gametes ◽  
Human Reproductive ◽  
Reproductive Anatomy

The human reproductive system is made up of the primary and secondary organs, which helps to enhances reproduction. The male reproductive system is designed to produce male gametes and convey them to the female reproductive tract through the use of supportive fluids and testosterone synthesis. The paired testis (site of testosterone and sperm generation), scrotum (compartment for testis localisation), epididymis, vas deferens, seminal vesicles, prostate gland, bulbourethral gland, ejaculatory duct, urethra, and penis are the parts of the male reproductive system. The auxiliary organs aid in the maturation and transportation of sperm. Semen is made up of sperm and the secretions of the seminal vesicles, prostate, and bulbourethral glands (the ejaculate). Ejaculate is delivered to the female reproduc¬tive tract by the penis and urethra. The anatomy, embryology and functions of the male reproductive system are discussed in this chapter.

scholarly journals The male reproductive system and the effect of an extract of a medicinal plant (Hypericum perforatum) on the labeling process of blood constituents with technetium-99m

2007 ◽  
Vol 50 (spe) ◽  
pp. 97-104 ◽  
Author(s):  
Sebastião David Santos-Filho ◽  
Adenilson de Souza da Fonseca ◽  
Mario Bernardo-Filho
Keyword(s):  
Reproductive Performance ◽  
Reproductive System ◽  
Hypericum Perforatum ◽  
Vas Deferens ◽  
Stannous Chloride ◽  
Male Reproductive System ◽  
Human Consumption ◽  
Blood Constituents ◽  
Technetium 99M ◽  
Young Rats

Hypericum perforatum (hiperico) is a plant that has been used to treat diseases and also inhibits rat and human vas deferens contractility. In nuclear medicine, stannous chloride (SnCl2) is used as a reducing agent to obtain radiopharmaceuticals labeling with technetium-99m. As the SnCl2 seems to have adverse effects related with the reproductive performance of male rabbits as well as the human consumption of hiperico might affect sexual function. In the present work, consistent results show significant changes on the blood constituents labeled by technetium-99m obtained from young rats under the effect of an hiperico extract as opposed to blood samples equally treated taken from elderly rat.. Supposedly, this extract could protect the male reproductive system against action of SnCl2 at least in young rats. The findings described in this work allow introducing a simple assay to evaluate the action of products that could interfere with the male reproductive system.

scholarly journals Natural Products as Protective Agents for Male Fertility

BioChem ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 122-147
Author(s):  
Roberta V. L. Martins ◽  
Ana M. S. Silva ◽  
Ana Paula Duarte ◽  
Sílvia Socorro ◽  
Sara Correia ◽  
...  
Keyword(s):  
Natural Products ◽  
Reproductive System ◽  
Male Fertility ◽  
Cell Damage ◽  
Folk Medicine ◽  
Male Reproductive System ◽  
Protective Agents ◽  
Accessory Glands ◽  
Exogenous Factors ◽  
Available Information

The male reproductive system is highly susceptible to noxious influences, such as oxidative stress, inflammation, drugs, and even diseases that can induce germ cell damage and alterations in spermatogenesis. All of these factors, which are caused by actions at the testicular level and/or at the excurrent ducts and accessory glands, significantly affect sperm parameters and male fertility. For this reason, it is of major importance to investigate possible ways to protect the male reproductive system since males are exposed to these toxic factors constantly. For centuries, natural products have been used by humans in folk medicine as therapeutic agents, and because of their beneficial properties for human health, plenty of them have been introduced to the pharmaceutical market as supplementary therapies. The present review aims to compile available information regarding different natural exogenous factors that demonstrate potential useful activity in the male reproductive system. The studies presented here reopen the perspective of using natural products as protective agents and eventually as new supplementary therapeutic options for the recovery of hampered spermatogenesis and/or male infertility.

scholarly journals RotundRacGAP Functions with Ras during Spermatogenesis and Retinal Differentiation in Drosophila melanogaster

2001 ◽  
Vol 21 (18) ◽  
pp. 6280-6291 ◽  
Author(s):  
Evelyne Bergeret ◽  
Isabelle Pignot-Paintrand ◽  
Annabel Guichard ◽  
Karine Raymond ◽  
Marie-Odile Fauvarque ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Cross Talk ◽  
Reproductive System ◽  
Seminal Vesicles ◽  
Genetic Interactions ◽  
Male Reproductive System ◽  
Pigment Cells ◽  
Null Mutation ◽  
Ras Pathway ◽  
Retinal Differentiation

ABSTRACT Our analysis of rotund (rn) null mutations in Drosophila melanogaster revealed that deletion of the rn locus affects both spermatid and retinal differentiation. In the male reproductive system, the absence of RnRacGAP induced small testes, empty seminal vesicles, short testicular cysts, reduced amounts of interspermatid membrane, the absence of individualization complexes, and incomplete mitochondrial condensation. Flagellar growth continued within the short rn null cysts to produce large bulbous terminations of intertwined mature flagella. Organization of the retina was also severely perturbed as evidenced by grossly misshapen ommatidia containing reduced numbers of photoreceptor and pigment cells. These morphological phenotypes were rescued by genomic rnRacGAPtransgenes, demonstrating that RnRacGAP function is critical to spermatid and retinal differentiation. The testicular phenotypes were suppressed by heterozygous hypomorphic mutations in theDras1 and drk genes, indicating cross talk between RacGAP-regulated signaling and that of the Ras pathway. The observed genetic interactions are consistent with a model in which Rac signaling is activated by Ras and negatively regulated by RnRacGAP during spermatid differentiation. RnRacGAP and Ras cross talk also operated during retinal differentiation; however, while the heterozygous hypomorphicdrk mutation continued to act as a suppressor of the rn null mutation, the heterozygous hypomorphic Dras1 mutation induced novel retinal phenotypes.

Ultrastructure of the male reproductive system of the free-living marine nematode Paracyatholaimus pugettensis Wieser & Hopper, 1967 (Chromadorida: Cyatholaimidae)

Nematology ◽  
2010 ◽  
Vol 12 (2) ◽  
pp. 255-268 ◽  
Author(s):  
Julia K. Zograf
Keyword(s):  
Epithelial Cells ◽  
Seminal Vesicle ◽  
Reproductive System ◽  
Vas Deferens ◽  
Proximal Part ◽  
Male Reproductive System ◽  
Synthetic Activity ◽  
The Sea Of Japan ◽  
Marine Nematode ◽  
Free Living

AbstractAlthough nematodes are a well studied group of multicellular organisms, until now the only information on the cellular structure of the male reproductive system of marine nematodes is that on the histology of free-living marine nematode from the order Enoplida. The fine structure of the male reproductive system of the free-living marine nematode Paracyatholaimus pugettensis (Chromadorida: Cyatholaimidae) from the Sea of Japan has been studied using TEM. The testis epithelium has a large distal tip cell similar to that described for representatives of the subclass Rhabditia. The epithelial wall of the testis is differentiated along its length. The proximal part of the epithelial tube consists of relatively large cells bearing numerous surface outgrowths that permeate between the developing spermatocytes. The epithelium in the middle region of the testis is formed from extremely flattened cells. The distal part of the testis – the seminal vesicle – is filled with immature spermatozoa and consists of absorptive cells. The seminal vesicle is followed by the vas deferens. The gonoduct is also differentiated along its length, the first third being formed from synthetically active epithelial cells, the two layers of which form a tiled structure. There is no lumen in the gonoduct and it is probable that, due to the tiled structure, the epithelial cells move apart to create space for the spermatozoa during ejaculation. The posterior two-thirds of the duct is surrounded by muscle cells that create the necessary pressure during ejaculation. The enlarged epithelial cells of the vas deferens show vigorous synthetic activity, which is probably involved in the transformation of immature spermatozoa into mature gametes.

Sign in / Sign up

Export Citation Format

Share Document