scholarly journals Male reproductive system structure and accessory glands ultrastructure of two species of Triatoma (Hemiptera, Reduviidae, Triatominae)

Micron ◽  
2010 ◽  
Vol 41 (5) ◽  
pp. 518-525 ◽  
Author(s):  
S.P.C. Freitas ◽  
T.C.M. Gonçalves ◽  
J.E. Serrão ◽  
J. Costa ◽  
J.R. Santos-Mallet
Keyword(s):  
Reproductive System ◽  
Male Reproductive System ◽  
System Structure ◽  
Accessory Glands

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 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.

The systematic position of Chaitophorinae (Hemiptera, Aphidoidea) in the light of anatomy research

2004 ◽  
Vol 35 (3) ◽  
pp. 317-327 ◽  
Author(s):  
Waclaw Wojciechowski ◽  
Karina Wieczorek
Keyword(s):  
Cross Sections ◽  
Reproductive System ◽  
Ejaculatory Duct ◽  
Systematic Position ◽  
Male Reproductive System ◽  
Taxonomic Position ◽  
Morphological Data ◽  
Histological Structure ◽  
Accessory Glands ◽  
Paraffin Method

AbstractThe structure of the male reproductive system of 14 Chaitophorine species is discussed: Chaitophorus capreae, C. leucomelas, C. nassonovi, C. populeti, C. populialbae, C. salicti, C. salijaponicus niger, C. tremulae, C. truncatus, C. vittelinae, Sipha maydis, Periphyllus aceris, P. coracinus, P. lyropictus. All species, except Sipha maydis, which lives on Poacea (grasses), feed on trees of the families Aceraceae (maples) and Salicaceae (poplars and willows). On the basis of longitudinal sections, cross-sections (paraffin method) and total preparation, the following elements in the structure of the male reproductive system have been examined: the number of testis follicles and the stage of the spermatogenesis; the connection of follicles and vasa deferentia, the position and the histological structure of the wall of vasa deferentia; and the development accessory glands and ejaculatory duct. These characters were then used to supplement morphological data in order to verify the taxonomic position of Chaitophorinae.

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.

Anatomical investigations of the male reproductive system of five species of Calaphidinae (Hemiptera, Aphidoidea)

2006 ◽  
Vol 37 (4) ◽  
pp. 457-465 ◽  
Author(s):  
Karina Wieczorek
Keyword(s):  
Reproductive System ◽  
Ejaculatory Duct ◽  
Proximal Part ◽  
Male Reproductive System ◽  
Morphological Data ◽  
Developmental Trends ◽  
Histological Sections ◽  
Accessory Glands ◽  
Whole Mount

AbstractThe structure of the male reproductive system of 5 species of Calaphidinae Clethrobius comes, Euceraphis betulae, Myzocallis (Lineomyzocallis) walshii, Tuberculatus (Tuberculoides) annulatus and Tuberculatus (Tuberculoides) neglectus is discussed. C. comes and E. betulae feed on birches (Betula), whereas M. (L.) walshii, T. (T.) annulatus, and T. (T.) neglectus are associated with oaks (Quercus). On the basis of histological sections and whole mount preparations the following elements in the structure of the male reproductive system have been examined: the number of testis follicles and the stage of spermatogenesis, the connection of follicles and vasa deferentia, the position of the proximal part of vasa deferentia as well as the development of accessory glands and the ejaculatory duct. In males of studied species the characters of the reproductive system have been observed: each testis holds 3 or 4 follicles, strongly elongated and arranged in a rosette. Vasa deferentia run separately along their length, only in the proximal part their walls cling together. Accessory glands are strongly elongated, sometimes asymmetric (T.(T.) annulatus) whereas the ejaculatory duct is usually reduced (in exception C. comes). These characters were then used to supplement morphological data in order to interpret developmental trends in the Calaphidinae.

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.

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