Fine structure of oviducal epithelium of <i>Xenopus laevis</i> in relation to its role in secreting egg envelopes

Yoshizaki, Norio

doi:10.1002/jmor.1051840206

Cited by 38 publications

(28 citation statements)

References 19 publications

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“…1A-F). Jelly secreting glands have also been observed in pars convoluta of R. pipiens and X. laevis oviduct (LEE 1967a(LEE , 1967bYosHIZAKI 1985). In X. laevis the oviduct was further divided into seven segments: the pars recta in to PR1 and PR2; the pars convoluta into 1-4 and the pars uterus.…”

Section: Discussionmentioning

confidence: 95%

“…2A). In X. laevis the total length of the oviduct is reported to be > 42 em (YOSHIZAKI 1985). It is not clear whether this variation in the length of the oviduct from one species to an other is due to variation in body size or the fecundity of the species.…”

Section: Discussionmentioning

confidence: 99%

“…In X. laevis the oviduct was further divided into seven segments: the pars recta in to PR1 and PR2; the pars convoluta into 1-4 and the pars uterus. The pars recta 1 and 2 are known to modify the vitelline coat and secrete a pre-fertilization layer respectively while, the pars convoluta segments 1-4 are known to secrete four jelly coats (YOSHIZAKI 1985). In R. pipiens the oviduct was divisible into six segments based on the differential staining of jelly glands which are known to secrete six layers of jelly Jl-J6 (SHIVER & JAMES 1970).…”

Section: Discussionmentioning

confidence: 99%

“…The histological, histochemical, and ultrastructural details of the annual oviduct cycle and a biochemical analysis of jelly have been reported for Rana pipiens (Schreber 1782) (LEE 1967a(LEE , 1967bSHIVER & JAMES 1970). The histological and ultrastructural details of the oviduct are also known for Xenopus laevis (Daudin 1803) (YOSHIZAKI 1985).…”

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confidence: 98%

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Annual oviduct cycle in the Indian skipper frog,Rana cyanophlyctis(Schneider 1799): a morphological study

Pawar

Pancharatna

1999

Tropical Zoology

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Seasonal changes in the weight, diameter, length and histological details of the oviduct were studied in adult Rana cyanophlyctis during the annual reproductive cycle. There are a pair of oviducts in this frog and each one was externally divisible into three segments, i.e., pars recta, pars convoluta and pars uterus. Histologically, the oviduct was composed of outer serosa/peritonial epithelium, middle connective tissue layer (which was very much reduced in thickness) and inner luminal epithelial lining. In the pars recta region, the inner epithelial cells formed longitudinal folds while, in the pars convoluta and pars uterus segments, the epithelial cells differentiated into gland cells and ciliated cells. There was a seasonal variation in the weight, length, diameter of different segments of the oviduct and in the height of the inner epithelial cell lining during the annual cycle. All these parameters were minimum in January (late post-breeding regression phase of reproductive cycle), increased up to September (breeding phase) and then declined following spawning activity. The results suggest that in R. cyalwphlyctis, the oviduct undergoes annual variation both in morphology and histological details that depict the functional status of the organ.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 98%

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Annual oviduct cycle in the Indian skipper frog,Rana cyanophlyctis(Schneider 1799): a morphological study

Pawar

Pancharatna

1999

Tropical Zoology

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“…In anurans, specific sub-regions of the middle convoluted portion of the oviduct have been associated with the production of jelly coat macromolecules for each particular envelope (36,42). In urodeles, a histochemical approach has shown differentiation of the oviductal secretory epithelium in Notophthalmus viridescens (23) and specific chemical assays for sialic acid (24) and sulfate (21, 22) have suggested specific localization of jelly coat macromolecules in situ and in the oviduct.…”

Section: Introductionmentioning

confidence: 99%

Structure and Macromolecular Composition of the Jelly Coats of the Urodele Ambystoma mexicanum

1992

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Cleavage-stage embryos of the neotenic urodele Ambystoma mexicanum are surrounded by a fertilization envelope and four macroscopic jelly coats termed J, (innermost) through J4 (outermost). In sections prepared for light microscopy, each of the jelly layers stained with protein stains and the periodic acid-Schiff's reagent, but only J1 stained with alcian blue at pH 2.5. These results suggest that each layer consists of proteins and glycoproteins and that J, uniquely contains some sulfate esters. Only J4 was solubilized with alkaline mercaptan treatment in situ, however, the isolated inner jelly complex (J1, J2 and J3) was easily dissolved in this reagent suggesting that solvent access is impaired in situ. A single alcian blue-staining component plus one protein-staining component were detected on reducing polyacrylamide gel electrophoresis of outer jelly (J4). In the inner jelly complex (J1, J2, J3), two protein-staining components were detected and no alcian blue-staining components were observed. A predominant polypeptide of 11 0,000 molecular weight was detected and purified to homogeneity on reducing and denaturing gels of the inner jelly complex. Amino acid analysis of the polypeptide demonstrated a slightly higher fraction of acidic over basic amino acids (GIx+Asx=18.1 mole% vs. Arg+Lys=11.7 mole%). The N-terminal amino acid was Glu and the sequence of the first eleven amino acids was determined.

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Ultrastructural studies of the effect of steroid hormones on pars recta secretions inBufo arenarum

1997

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Fine structure of oviducal epithelium of Xenopus laevis in relation to its role in secreting egg envelopes

Cited by 38 publications

References 19 publications

Annual oviduct cycle in the Indian skipper frog,Rana cyanophlyctis(Schneider 1799): a morphological study

Annual oviduct cycle in the Indian skipper frog,Rana cyanophlyctis(Schneider 1799): a morphological study

Structure and Macromolecular Composition of the Jelly Coats of the Urodele Ambystoma mexicanum

Ultrastructural studies of the effect of steroid hormones on pars recta secretions inBufo arenarum

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