Ultrastructure of the reproductive system of the black swamp snake (seminatrix pygaea). III. Sexual segment of the male kidney

Sever, David M.; Stevens, Rebecca; Ryan, Travis J.; Hamlett, William C.

doi:10.1002/jmor.1102

Cited by 50 publications

(95 citation statements)

References 21 publications

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“…In reptiles, the ductus deferens are recognized as the site of spermatozoa storage in males and, differently from mammals, the epididymis does not participate in sperm maturation and storage (Sever et al 2002). The ductus deferens of C. d. terrificus are convoluted and enter the cloaca independently of the ureters.…”

Section: Rattlesnake Seminal Peptidasesmentioning

confidence: 99%

“…It is noteworthy that C. d. terrificus possesses PR structures, since squamates do not possess a prostate gland, seminal vesicles, and bulbo-urethral and urethral glands (Sever 2004). The renal sexual segment is known to act as an accessory sex organ (Sever et al 2002), from which those structures could have originated. This renal sexual segment of snakes secretes a complex of glycogen, Rattlesnake seminal peptidases mucopolysaccharides, lipids, mucoproteins, and phosphatases (Kü hnel & Krisch 1974) in a pattern that can be related to spermatogenic cycle and mating activity (Sever et al 2002).…”

Section: Rattlesnake Seminal Peptidasesmentioning

confidence: 99%

“…The renal sexual segment is known to act as an accessory sex organ (Sever et al 2002), from which those structures could have originated. This renal sexual segment of snakes secretes a complex of glycogen, Rattlesnake seminal peptidases mucopolysaccharides, lipids, mucoproteins, and phosphatases (Kü hnel & Krisch 1974) in a pattern that can be related to spermatogenic cycle and mating activity (Sever et al 2002). However, since in the present study the semen was collected from the ductus deferens, it would not have mixed with fluids from the renal sexual segment but probably from other areas of major secretory activity in the snake urogenital system, e.g.…”

Section: Rattlesnake Seminal Peptidasesmentioning

confidence: 99%

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Peptidase activities in Crotalus durissus terrificus semen

Marinho

Almeida‐Santos²,

Carneiro³

et al. 2008

Reproduction

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To understand the role of peptidases in seminal physiology of Crotalus durissus terrificus, activity levels of representative enzymes in semen and their sensitivities to inhibitors, cofactors, and peptide hormones were evaluated. The existence of seminal fractions and the association of peptidases with these fractions were also characterized for the first time in snakes. The prominent inhibitors of aminopeptidases (APs) were amastatin for acid, basic, and neutral; bestatin for basic; and diprotin A for dipeptidyl-IV. Cystyl and prolylimino APs were similarly susceptible to the majority of these inhibitors. The basic and neutral were characterized as metallo-peptidases, acid AP was activated by MnCl 2 , and cystyl, prolyl-imino, and type I pyroglutamyl were characterized as sulphydryl-dependent APs. Angiotensin II, vasotocin, bradykinin, fertilization-promoting peptide, and TRH altered the majority of these peptidase activities; these peptides are possible substrates and/or modulators of these peptidases. Peptidase activities were found in all seminal fractions: seminal plasma (SP), prostasome-like (PR) structures, and soluble (S-) and membrane-bound fractions (MFs) of spermatozoa. The levels of activity of each peptidase varied among different seminal fractions. In SP, the higher activities were puromycin-insensitive neutral and basic APs. In PR, the higher activity was puromycin-insensitive neutral AP. In spermatozoa, the higher activity in subcellular SF was puromycinsensitive neutral, while in MF both puromycin-sensitive and -insensitive neutral APs were equally higher than the other examined peptidases. Data suggested that these peptidases, mainly basic and neutral, have a high relevance in regulating seminal functions of C. d. terrificus. Reproduction (2008) 136 767-776

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Section: Rattlesnake Seminal Peptidasesmentioning

confidence: 99%

Section: Rattlesnake Seminal Peptidasesmentioning

confidence: 99%

Section: Rattlesnake Seminal Peptidasesmentioning

confidence: 99%

See 1 more Smart Citation

Peptidase activities in Crotalus durissus terrificus semen

Marinho

Almeida‐Santos²,

Carneiro³

et al. 2008

Reproduction

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“…A estocagem tem sido descrita em várias famílias de serpentes, tais como colubrídeos (SAINT-GIRONS, Outro fator importante a ser estudado na reprodução dos machos de serpentes, é o segmento sexual renal (SSR). O SSR localizado no rim é uma porção especializada do néfron, formado por um epitélio simples, constituído de células colunares com núcleo basal e presença de grânulos sexuais espalhados por todo o citoplasma (SEVER et al, 2002;KROMER;MARTINEZ;MASON, 2004). Uma característica importante que associa o SSR com a reprodução, é a hipertrofia dessa região, geralmente na época de acasalamento e com o aumento da atividade testicular SEVER et al, 2002).…”

Section: Biologia Reprodutiva De Machos E Fêmeasunclassified

“…O SSR localizado no rim é uma porção especializada do néfron, formado por um epitélio simples, constituído de células colunares com núcleo basal e presença de grânulos sexuais espalhados por todo o citoplasma (SEVER et al, 2002;KROMER;MARTINEZ;MASON, 2004). Uma característica importante que associa o SSR com a reprodução, é a hipertrofia dessa região, geralmente na época de acasalamento e com o aumento da atividade testicular SEVER et al, 2002). Tal fato é decorrente da associação do SSR com o hormônio testosterona KROMER;MARTINEZ;MASON, 2004).…”

Section: Biologia Reprodutiva De Machos E Fêmeasunclassified

Biologia reprodutiva da jararaca da Amazônia, Bothrops atrox (Serpente: Viperidae)

Silva¹

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DEDICATÓRIA AGRADECIMENTOSÀ minha orientadora Selma M. de Almeida-Santos. Obrigada Selma por me acolher ainda na iniciação, sou muito grata a você por ter me ajudado a realizar esse sonho e por acreditar em mim, pelo apoio e incentivo em todos os momentos. E também pelo exemplo de carinho e preocupação com todos nós do grupo de reprodução.Ao Otavio A. V. Marques pela parceria e apoio, sem sua ajuda a viagem ao Pará seria muito difícil. Obrigada Otávio!!! Ao Ricardo J. Sawaya, pela sua atenção e acolhimento quando ainda eu apenas buscava informações e bibliografias para o meu trabalho de reprodução em cativeiro com serpentes. Obrigada Ricardo por apresentar a Selma, a partir desse momento a minha vida mudou.À Leticia Ruiz Sueiro por me ensinar a dissecar e coletar dados da biologia reprodutiva de serpentes e pelos seus brilhantes conselhos. Bothrops atrox is a snake of large ecological importance due to its wide geographic distribution in the vast and diversified Amazonian habitat. Information about the reproductive biology of B. atrox are scarce and punctual, with most information derived from snakes kept in captivity. Thus, this paper aimed to describe the reproductive cycle of B. atrox, as well as reproductive strategies related to this cycle as: maturity and sexual dimorphism, fecundity, sperm storage, and the hypertrophy of sexual segment of the kidney in males. Moreover, this work also aimed to relate such strategies with environmental conditions (temperature and precipitation). For that, it were examined 325 specimens of B. atrox, being males and females (mature and immature) from the Brazilian Amazon, preserved in nine herpetological collections. Results showed some differences related to sexual dimorphism: neonates males had the coloration of the tail tip yellow, whereas females showed the tail tip with dark coloration. It was also observed that neonate males had dark pigmentation in the throat region, whereas neonate females showed lighter coloration. Adult females were significantly larger than males, and attained sexual maturity at larger body sizes than males. Vitellogenesis was seasonal (January to August), however, there was no synchrony between the occurrence of pregnant females and birth periods. Thus, the extent observed in the female reproductive cycle was possible due to the sperm storage, since mating is seasonal. Male reproductive cycle was discontinuous, seasonal semi-synchronous. Sperm production occurred throughout the year, however, spermiogenesis was observed mainly in the beginning of the rainy season (BRS) and testicular regression in the beginning of the dry season (BRS). Sperm storage in the ductus deferens was observed during all months of the year and the sexual segment of the kidney presented hypertrophy in BRS and in the end of the rainy season (ERS), thus synchronized with spermiogenesis. Therefore, environmental conditions (temperature and rainfall) were essential in determining the type of reproductive cycle of B. atrox. Pregnant females were found during several months o...

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Observations on the Sexual Segment of the Kidney of Snakes with Emphasis on Ultrastructure in the Yellow‐Bellied Sea Snake, Pelamis platurus

Sever

Rheubert

Gautreaux

et al. 2012

The Anatomical Record

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The sexual segment of the kidney (SSK) is an accessory sex structure in male lizards and snakes (Squamata). We describe histology of the SSK in 12 species of snakes, including one from the basal Scolecophidia, Leptotyphlops dulcis, and from the more advanced Alethinophidia, species from the Acrochordidae (Acrochordus granulatus), Homalopsidae (Cerberus rynchops), Uropeltidae (Teretrurus sanguineus), and eight species from the Elapidae, including six species of sea snakes. We also describe the ultrastructure of the SSK of the sea snake, Pelamis platurus. The SSK of L. dulcis does not include the ureter but does include distal convoluted tubules (DCTs) and collecting ducts. In all other snakes examined, the SSK is limited to the DCTs and does not differ in histology by any consistent character. We found apparently mature individuals of several species with inactive SSKs. Hypertrophied SSKs give positive reactions for protein secretions but variable reactions for carbohydrates. Ultrastructure of the SSK of P. platurus reveals nuclei situated medially in the epithelium and mature electron dense secretory vacuoles in other areas of the cytoplasm. Product release is apocrine. Junctional complexes only occur at the luminal border, and intercellular canaliculi become widened and are open basally. No cytologically unique characters occur in the SSK of P. platurus. The ancestral condition of the SSK in squamates is the presence of simple columnar epithelium specialized for secretion of a protein þ carbohydrate product that matures and is released seasonally. Anat Rec,

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Ultrastructure of the reproductive system of the black swamp snake (seminatrix pygaea). III. Sexual segment of the male kidney

Cited by 50 publications

References 21 publications

Peptidase activities in Crotalus durissus terrificus semen

Peptidase activities in Crotalus durissus terrificus semen

<b>Biologia reprodutiva da jararaca da Amazônia, <i>Bothrops atrox</i> (Serpente: Viperidae)</b>

Observations on the Sexual Segment of the Kidney of Snakes with Emphasis on Ultrastructure in the Yellow‐Bellied Sea Snake, Pelamis platurus

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