scholarly journals The Male Reproductive Structure and Spermatogenesis of Trypophloeus Klimeschi Eggers (Coleoptera: Curculionidae: Scolytinae)

2019 ◽  
Author(s):  
Jing Gao ◽  
Guanqun Gao ◽  
Lulu Dai ◽  
Jiaxing Wang ◽  
Hui Chen
Keyword(s):  
Seminal Vesicle ◽  
Reproductive Tract ◽  
Vas Deferens ◽  
Ejaculatory Duct ◽  
Reproductive Organ ◽  
Accessory Gland ◽  
Male Reproductive Tract ◽  
Short Branch ◽  
Male Reproductive Organ ◽  
Dense Band

Abstract Background Trypophloeus Klimeschi Eggers (Coleoptera: Curculionidae: Scolytinae) is one of the most destructive pests of Populus alba var. pyramidalis (Bunge), resulting in significant losses in economic, ecological and social benefits in China’s northwest shelter forest. But research of reproductive system, spermiogenesis and spermatozoon ultrastructure of T. klimeschi that is basis of phylogeny, reproductive biology and controlling is still black. Results The male reproductive organ of T. klimeschi is composed of testis, seminal vesicle, strand shaped accessory gland containing long branch of strand shaped accessory gland and short branch of strand shaped accessory gland, curly accessory gland, vas deferens and a common ejaculatory duct. The number of sperm per cyst is 350~512. Its spermatozoon is slender, measuring about 75 μm in length and 0.5 μm in wide and composed of a 3-layred acrosomal complex, a nucleus with two different states of aggregation, two mitochondrial derivatives with dark crystal, a 9+9+2 axoneme that run more or less parallel to mitochondrial derivatives, two crystalline accessory bodies with a big compact “puff”-like expansion. Especially in the seminal vesicle, its long flagella folded into several turns and the whole sperm is wrapped in a film.Conclusion The general morphology of male reproductive tract, the spermatogenesis and the spermatozoa of T. klimeschi are, for the most part, similar to the majority of the Curculionidae. However, some distinct differences were found: the low electron-dense band in the cytoplasm of spermatocytes; two different aggregation states of spermatozoon nucleus; especially the stored way of T. klimeschi spermatozoa.

Ultrastructure of the male reproductive system in a rumen amphistome Cotylophoron cotylophorum

1994 ◽  
Vol 68 (3) ◽  
pp. 255-258
Author(s):  
P.N. Sharma ◽  
G. Swarnakar ◽  
R.E.B. Hanna
Keyword(s):  
Reproductive Tract ◽  
Vas Deferens ◽  
Longitudinal Muscle ◽  
Prostate Gland ◽  
Ejaculatory Duct ◽  
Ultrastructural Organization ◽  
Male Reproductive Tract ◽  
Duct Epithelium ◽  
Internal Lining ◽  
Entire Male

AbstractThe ultrastructure of various regions of the male reproductive tract and the prostate gland of Cotylophoron cotylophorum (Trematoda: Digenea) is described. The internal lining of the entire male duct system is syncytial in nature, and regional variation is quite evident. The syncytial epithelium of the vas deferens and seminal vesicle is very thin, flat and lamellate and the lumen is packed with spermatozoa. In the pars musculosa (PM) the syncytium is also flat but lamellae are sparsely distributed and anastomosed at places to form loops. The syncytium of the PM is invested by several layers of circular and longitudinal muscle. The pars prostatica (PP) is lined by an uneven but moderately thick syncytial epithelium with nuclei projecting into the lumen. The syncytium bears numerous very long lamellae. The ejaculatory duct epithelium is devoid of lamellae. It is even and moderately thick throughout. The prostate gland cells are uneven in outline and bear long ducts which open into the lumen of the PP. They show an ultrastructural organization suggestive of protein secretion.

scholarly journals Positional Relationships among Male Reproductive Organs in Insects

2021 ◽  
Author(s):  
Satoshi Hiroyoshi ◽  
Gadi V.P. Reddy
Keyword(s):  
Seminal Vesicle ◽  
Vas Deferens ◽  
Ejaculatory Duct ◽  
Reproductive Organs ◽  
Accessory Gland ◽  
Morphological Development ◽  
Lepidopteran Insects ◽  
Other Substances ◽  
Male Reproductive Organs ◽  
And Function

The location, morphology and function of male internal reproductive organs in insects have been extensively studied, but the relative positioning of those organs is less understood. Position and morphology of the testis, vas deferens, seminal vesicle, accessory gland and ejaculatory duct determine the migration or ejaculation of sperm and other substances. In species where the testis is connected with the seminal vesicle directly or the seminal vesicle is lacking, males usually store complete sperm in the testis and thus can use them immediately for mating. In contrast, the testis of lepidopteran insects is separated from the duplex (sperm storage organ) via the vas deferens, and the sperm are not mature, requiring morphological development in the vas deferens. Here, we discuss the significance of various positional relationships of male reproductive organs and how this relates to their morphology and function with a focus on sperm.

The anatomy, histology, and physiology of the reproductive systems of Lytta nuttalli Say (Coleoptera: Meloidae). I. The internal genitalia

1971 ◽  
Vol 49 (4) ◽  
pp. 523-533 ◽  
Author(s):  
G. H. Gerber ◽  
N. S. Church ◽  
J. G. Rempel
Keyword(s):  
Vas Deferens ◽  
Ejaculatory Duct ◽  
Reproductive Organs ◽  
Accessory Gland ◽  
Bursa Copulatrix ◽  
Reproductive Systems ◽  
Accessory Glands ◽  
Internal Genitalia ◽  
Spermathecal Gland ◽  
Colleterial Gland

The anatomy and histology of the male and female internal genitalia of Lytta nuttalli Say and the functions of the various organs during copulation and oviposition are described. In addition to the ovaries, lateral and common oviducts, and vagina, the female system includes a spermatophoral receptacle, accessory gland, and spermatheca. The most distinctive feature is the voluminous spermatophoral receptacle, which seems to be homologous with the bursa copulatrix of other Coleoptera, but serves to store and digest old spermatophores. The accessory gland is not a colleterial gland, but instead produces materials that probably are involved in the transfer of the spermatozoa into the spermatheca. The epithelia of the calyces and oviducts secrete the frothy, mucilaginous material that coats the eggs at oviposition. In the absence of a separate spermathecal gland, the epithelium of the spermatheca apparently has taken over its functions. The ovaries contain several hundred ovarioles of the telotrophic type. The chief structures of the male system are three pairs of accessory glands plus the testes, vasa deferentia, and ejaculatory duct. Each vas deferens consists of an enlarged portion that serves as an additional accessory gland and a narrow part, which is the seminal vesicle. Materials produced in the three pairs of accessory glands and the glandular portions of the vasa deferentia are used in spermatophore formation. The testes contain several hundred short sperm tubes similar to those of other insects. The arrangement, form, and functions of the internal reproductive organs of L. nuttalli are compared with those of other insects. Observations made on the reproductive systems of four species of Epicauta are also discussed in this context.

Studies on the structure and histochemistry of the male reproductive tract of Aspiculuris tetraptera (Nematoda: Oxyuridea)

Parasitology ◽  
1966 ◽  
Vol 56 (2) ◽  
pp. 347-358 ◽  
Author(s):  
A. O. Anya
Keyword(s):  
Reproductive Tract ◽  
Vas Deferens ◽  
Male Reproductive Tract ◽  
The Gift ◽  
National University ◽  
Aspiculuris Tetraptera

The histological anatomy of the male reproductive tract as well as the cytochemistry of the cells of different regions of the male tract in Aspiculuris tetraptera are described.It is shown that there are at least three different regions of the vas deferens, each of which releases one or more substances into the lumen of the male system and thus contributes to the composition of the semen. The histochemical nature of these secretions is given and it is suggested that the secretions of the distal vas deferens are oxytocic.My thanks are due to Professor J. D. Smyth of the Australian National University, Canberra, for the gift of RNA-ase (L. Light and Co.) and some other histochemical reagents, to Dr T. R. R. Mann, C.B.E., F.R.S., and Dr D. L. Lee, for helpful discussions during the course of this study and for reading the draft manuscript.

THE REPRODUCTIVE ORGANS OF THE VELVET MITE, ALLOTHROMBIUM LEROUXI (TROMBIDIFORMES: TROMBIDIIDAE)

1970 ◽  
Vol 102 (2) ◽  
pp. 144-157 ◽  
Author(s):  
S. N. Mathur ◽  
E. J. LeRoux
Keyword(s):  
Seminal Vesicle ◽  
Ejaculatory Duct ◽  
Reproductive Organs ◽  
Accessory Gland ◽  
Male And Female ◽  
Accessory Glands ◽  
Receptaculum Seminis ◽  
Female Reproductive Organs

AbstractThe anatomy and functions of the male and female reproductive organs of Allothrombium lerouxi Moss are described in detail. In the male, the reproductive organs consist of paired testes, paired vasa diferentia, a median seminal vesicle, a median ejaculatory duct, bursa expulsatoria, a penis, and a median accessory gland; in the female, they consist of paired ovaries, paired oviducts, a median uterus and a vagina. The function of the parts in the male differs from that reported in other species of Trombidiformes, and in females fertilization takes place in the spongy epithelium of the uterus instead of in the oviducts as in oribatids. Females also lack a receptaculum seminis and accessory glands.

X-Ray Diffraction Study on Human Male Reproductive Tract and Semen

2009 ◽  
Vol 76 (3) ◽  
pp. 198-202 ◽  
Author(s):  
K.P. Skandhan ◽  
S. Amith ◽  
K.P.S. Avni
Keyword(s):  
Seminal Vesicle ◽  
Calcium Silicate ◽  
Reproductive Tract ◽  
Prostate Gland ◽  
X Ray Diffraction ◽  
Male Reproductive Tract ◽  
X Ray ◽  
Human Male ◽  
Barium Silicate ◽  
Copper Gold

In the present study authors had separated testis, epididymis-caput, corpus, cauda, vas deferens, seminal vesicle, prostate gland and bulbourethral gland from human male reproductive tract, made it to ash form. Semen also underwent same procedure. All samples had undergone X-ray diffraction analysis. Results Results showed there where two distinct rings for each sample. We named it is “A” &” B”. Under “A” Barium silicate, Barium silicate hydrate and three metal complexes of copper, gold and zinc were seen. Under “B” Calcium silicate and calcium silicate hydrate were observed. Both “A” and “B” were seen throughout the length (expect for “A” is seminal vesicle) and in semen. Conclusions A tri metal complex of copper, gold and zinc is reported in this study, is first of its kind in Biology.

Morphometry of the testis follicles in Triatoma rubrofasciata (De Geer, 1773) (Hemiptera, Triatominae)

2007 ◽  
Vol 57 (4) ◽  
pp. 393-400 ◽  
Author(s):  
Teresa Cristina Monte Gonçalves ◽  
Simone Patrícia Carneiro Freitas ◽  
Jacenir Reis Dos Santos-Mallet ◽  
José Eduardo Serrão ◽  
Elias Seixas Lorosa
Keyword(s):  
Phylogenetic Analysis ◽  
Reproductive Tract ◽  
Common Ancestor ◽  
Ejaculatory Duct ◽  
Seminal Vesicles ◽  
Male Reproductive Tract ◽  
Accessory Glands ◽  
Morphometrical Analysis ◽  
Left And Right ◽  
Triatoma Rubrofasciata

AbstractThe male reproductive tract in Triatominae has a pair of testes, two vasa deferentia, a pair of seminal vesicles, four pairs of accessory glands, and an ejaculatory duct, which opens in the aedeagus. In species of the genus Triatoma each testis is formed by seven testicular follicles. Because Triatoma rubrofasciata has a common ancestor with species of Triatoma occurring in North America and because the length of testis follicles varies among different species of Triatoma a morphometrical analysis of the follicles was conducted. Triatoma rubrofasciata has seven testis follicles of variable length that are similar between left and right testes. The statistics allowed the classification in a long follicle, two medium follicles, two that are short, and two that are very short. This finding is compared with data available for other Triatominae and it is emphasized that the length of follicles testis should be included in future phylogenetic analysis of Triatominae.

scholarly journals 11β-Hydroxysteroid dehydrogenase enzymes in the testis and male reproductive tract of the boar (Sus scrofa domestica) indicate local roles for glucocorticoids in male reproductive physiology

Reproduction ◽  
2007 ◽  
Vol 134 (3) ◽  
pp. 473-482 ◽  
Author(s):  
Victoria Sharp ◽  
Lisa M Thurston ◽  
Robert C Fowkes ◽  
Anthony E Michael
Keyword(s):  
Reproductive Tract ◽  
Vas Deferens ◽  
Physiological Role ◽  
Kinetic Studies ◽  
Hydroxysteroid Dehydrogenase ◽  
Enzyme Expression ◽  
Male Reproductive Tract ◽  
Cortisol Metabolism ◽  
Sus Scrofa Domestica ◽  
Caput Epididymidis

11β-Hydroxysteroid dehydrogenase (11βHSD) enzymes modulate the target cell actions of corticosteroids by catalysing metabolism of the physiological glucocorticoid (GC), cortisol, to inert cortisone. Recent studies have implicated GCs in boar sperm apoptosis. Hence, the objective of this study was to characterise 11βHSD enzyme expression and activities in the boar testis and reproductive tract. Although 11βHSD1 and 11βHSD2 mRNA transcripts and proteins were co-expressed in all tissues, cortisol–cortisone interconversion was undetectable in the corpus and cauda epididymides, vas deferens, vesicular and prostate glands, irrespective of nucleotide cofactors. In contrast, homogenates of boar testis, caput epididymidis and bulbourethral gland all displayed pronounced 11βHSD activities in the presence of NADPH/NADP+ and NAD+, and the penile urethra exhibited NAD+-dependent 11β-dehydrogenase activity. In kinetic studies, homogenates of boar testis, caput epididymidis and bulbourethral gland oxidised cortisol with Km values of 237–443 and 154–226 nmol/l in the presence of NADP+ and NAD+ respectively. Maximal rates of NADP+-dependent cortisol oxidation were 7.4- to 28.5-fold greater than the Vmax for NADPH- dependent reduction of cortisone, but were comparable with the rates of NAD+-dependent cortisol metabolism. The relatively low Km estimates for NADP+ -dependent cortisol oxidation suggest that either the affinity of 11βHSD1 has been increased or the cortisol inactivation is catalysed by a novel NADP+-dependent 11βHSD enzyme in these tissues. We conclude that in the boar testis, caput epididymidis and bulbourethral gland, NADP+- and NAD+-dependent 11βHSD enzymes catalyse net inactivation of cortisol, consistent with a physiological role in limiting any local actions of GCs within these reproductive tissues.

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