Aspetti ultrastrutturali del testicolo in larve di Lithobius forficatus L.

Marina Camatini; Emilia Franchi

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti (1975)

  • Volume: 58, Issue: 1, page 49-56
  • ISSN: 0392-7881

Abstract

top
The ultrastructure of the testis of the chilopod Lithobins forficatus L. during the fifth larval stage has been studied. The testis wall is constituted of an epithelial layer, a thin basement membrane, two concentric muscle layers, a sheet of extremely interdigitated epithelial cells. The testis lumen is filled with spermatogonia and spermatocytes. The muscle fibers contain a single nucleus; the contractile elements present a peculiar organization: the number of actin filaments at I band level, per unit area, is two times higher than that of A band level, and the ratio between myosin and actin filaments is about 1:2. In longitudinal sections the Z bands are not evident. The spermatogonia have a nucleus with dispersed chromatin and a compact nucleolus and a reduced cytoplasm, which contains ribosomes and small mitochondria. During spermatocytes growth, nucleus and cytoplasm increase markedly in volume. Ribosomes, mitochondria, dictyosomes and endoplasmic reticulum are very numerous.

How to cite

top

Camatini, Marina, and Franchi, Emilia. "Aspetti ultrastrutturali del testicolo in larve di Lithobius forficatus L.." Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti 58.1 (1975): 49-56. <http://eudml.org/doc/291269>.

@article{Camatini1975,
author = {Camatini, Marina, Franchi, Emilia},
journal = {Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti},
language = {ita},
month = {1},
number = {1},
pages = {49-56},
publisher = {Accademia Nazionale dei Lincei},
title = {Aspetti ultrastrutturali del testicolo in larve di Lithobius forficatus L.},
url = {http://eudml.org/doc/291269},
volume = {58},
year = {1975},
}

TY - JOUR
AU - Camatini, Marina
AU - Franchi, Emilia
TI - Aspetti ultrastrutturali del testicolo in larve di Lithobius forficatus L.
JO - Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti
DA - 1975/1//
PB - Accademia Nazionale dei Lincei
VL - 58
IS - 1
SP - 49
EP - 56
LA - ita
UR - http://eudml.org/doc/291269
ER -

References

top
  1. ANDRÉ, J. (1962) - Contribution à la connaissance du chondriome. Etude de ses modifications ultrastructurales pendant la spermatogenese, «J. Ultrastruct. Res., Suppl.», 3, 1-185. 
  2. ANDRÉ, J. (1968) - Données récentes sur la phisiologie des mitochondries, «C.R. Soc. Biol. (Paris)», 162, 7-12. 
  3. AUBER, M. (1963) - «Compt. Rend. Acad. Sci.», 256, 2022. 
  4. BOISSIN, L. (1970) - Gamétogénèse au cours du développement post-embryonnaire et biologie de la reproduction chez Hysterochelifer meridianus (L. Koch) (Arachnides, Pseudo-scorpions), Thèse Dcct. Sci. Nat., Montpellier. 
  5. CAMATINI, M., SAITA, A. e COTELLI, F. (1974) - Spermiogenesis of Lithobius forficatus L. at ultrastruttural level, «Symp. Zool. Soc. Lond.», 32, 231. 
  6. CAMATINI, M. e CASTELLANI, L. (1974) - Atypical myofilament array of visceral muscle fibers of Lithobius forficatus L. testis. «J. Submicr. Cytol.», 6, 353-365. 
  7. DESCAMPS, M. (1969) - Etude cytochimique de la spermatogénèse chez Lithobius forficatus L. (Myriapode Chilopode), «Histochemie», 20, 46-47. 
  8. DESCAMPS, M. (1969 a) - Etude cytologique de la spermatogénèse chez Lithobius forficatus L. (Myriapode Chilopode), «Archives de zoologie experimentale et generale», 110 (3), 349-361. 
  9. DESCAMPS, M. (1972 a) - Etude ultrastrîicturale du spermatozoïde de Lithobius forficatus L. (Myriapode Chilopode), «Z. Zellforsch.», 126, 193-205. 
  10. FAHLANDER, K. (1938) - «Zool. Bidr. Fr. Upsala», 17. 
  11. FAWCETT, D. W., SLAUTTERBACK, D. L. e ITO, S. (1959) - «J. Biophys. Biochem. Cytol.», 5, 453. 
  12. GEORGES, D. (1969) - Spermatogénèse et spermiogênèse de Ciona intestinalis L. observée au microscope életronique, «J. Microscopie», 8, 391-400. 
  13. JOLY, R. e DESCAMPS, M. (1969) - Evolution du testicule, des vescicules séminales et cycle spermatogénétique chez Lithobius forficatus L. (Miriapode Chilopode), «Archives de Zoologie expérimentale et générale», 110 (3), 341-348. 
  14. NATH, V. (1925) - Spermatogenesis of Lithobius forficatus L, «Proc. Cambridge Phil. Soc.», 1, 270-277. 
  15. NICANDER, L. e PLOEN, L. (1969) - Fine structure of spermatogonia and primary spermatocytes in Rabbits, «Z. Zellforsch», 99, 221-234. 
  16. PRUNESCO, C. (1964) - Anatomie microscopique du système genital mâle des Lithobiddés (Lithobiomorpha, Ckilopada), «Revue de Biologie (Académie de la R. P. Roumaine)», 9, 101-106. 
  17. WALKER, M. e MACGRAGOR, M. C. (1968) - Spermiogenesis and the structure of the mature sperm in Nucella lapillus L., «J. Cell. Sci.», 3, 95-104. 
  18. ZERBIB, C. (1966) - Etude descriptive et expérimentale de la dijfêrenctiation de l'appareil génital du Myriapode Chilopode Lithobius forficatus L., «Bull. Soc. Zool. Fr.», 91, 203-215. 
  19. ZYLBERBERG, L. (1968) - Contribution à l'étude de la spermatogênèse chez un Lépidoptère (Pieris brassicae L. Pieridae), Thèse Doct. Sci. Nat., Paris. 

NotesEmbed ?

top

You must be logged in to post comments.

To embed these notes on your page include the following JavaScript code on your page where you want the notes to appear.

Only the controls for the widget will be shown in your chosen language. Notes will be shown in their authored language.

Tells the widget how many notes to show per page. You can cycle through additional notes using the next and previous controls.

    
                

                
Note: Best practice suggests putting the JavaScript code just before the closing </body> tag.