Login
Registrati
Reimposta password
Pubblica & Distribuisci
Soluzioni Editoriali
Soluzioni di Distribuzione
Temi
Architettura e design
Arti
Business e Economia
Chimica
Chimica industriale
Farmacia
Filosofia
Fisica
Geoscienze
Ingegneria
Interesse generale
Legge
Letteratura
Linguistica e semiotica
Matematica
Medicina
Musica
Scienze bibliotecarie e dell'informazione, studi library
Scienze dei materiali
Scienze della vita
Scienze informatiche
Scienze sociali
Sport e tempo libero
Storia
Studi classici e del Vicino Oriente antico
Studi culturali
Studi ebraici
Teologia e religione
Pubblicazioni
Riviste
Libri
Atti
Editori
Blog
Contatti
Cerca
EUR
USD
GBP
Italiano
English
Deutsch
Polski
Español
Français
Italiano
Carrello
Home
Riviste
Journal of Nematology
Volume 53 (2021): Numero 1 (January 2021)
Accesso libero
Introduction to
Pristionchus pacificus
anatomy
Nathan E. Schroeder
Nathan E. Schroeder
| 03 nov 2021
Journal of Nematology
Volume 53 (2021): Numero 1 (January 2021)
INFORMAZIONI SU QUESTO ARTICOLO
Articolo precedente
Articolo Successivo
Sommario
Articolo
Immagini e tabelle
Bibliografia
Autori
Articoli in questo Numero
Anteprima
PDF
Cita
CONDIVIDI
Pubblicato online:
03 nov 2021
Pagine:
1 - 9
DOI:
https://doi.org/10.21307/jofnem-2021-091
Parole chiave
Cytology
,
Electron microscopy
,
Free-living nematode
,
Morphology
,
Ultrastructure
,
WormAtlas
© 2021 Nathan E. Schroeder et al., published by Sciendo.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Figure 1:
Pristionchus pacificus (A) and Caenorhabditis elegans (B) adult hermaphrodites have similar sizes and shapes. Scale bar 50 µm.
Figure 2:
Life cycle of Pristionchus pacificus. Differential interference contrast images of developmental stages. Development from the two-cell stage to adult takes approximately 72 hrs at 20°C. Each post-embryonic stage is positioned with its left side facing the reader, except the J4, which is facing the right side. Scale bar, 50 µm.
Figure 3:
Unhatched J2. The presence of a shed J1 cuticle (arrowhead) is indicative of the J1 to J2 molt occurring prior to hatching. Scale bar, 10 µm.
Figure 4:
(A) The cuticle of P. pacificus contains longitudinal stippled lines around the circumference of the animal. Scale bar, 10 µm. (B) In an EM cross section, this stippling can be seen as waves around the animal (arrowheads). Scale bar, 1 µm. Image source: Ralf Sommer Lab, Bumbarger13–1301. (C, D) The cuticle of P. pacificus is interrupted by epithelial gland cell pores. In DIC (C), the small gland cell pores (arrow) are occasionally visible both dorsal and ventral of the midline (deirid, arrowhead). Scale bar, 10 µm. In EM cross sections (D), the epithelial gland cell (purple) is surrounded by the hypodermis. Scale bar, 1 µm. Image Source: Ralf Sommer, Bumbarger14–1955.
Figure 5:
Transverse EM section through the P. pacificus head showing body wall muscles (green) lying against body wall. Scale bar, 1 µm.
Figure 6:
Transverse TEM micrograph through junction of excretory glands with canal cell and secretory vesicle being released in gland cell ampulla (arrowhead). Scale bars, 1 µm. Source: Ralf Sommer lab, Bumbarger13_2251.
Figure 7:
(A) Longitudinal EM through stoma of eurystomatous form with dorsal tooth (arrowheads). The dorsal tooth attaches to pharyngeal muscle (green) and contains an opening for vesicles from the dorsal pharyngeal gland (purple) to be released into the stoma. A subventral tooth (arrow) is seen on the opposite side. Scale bar, 1 µm. (B) Transverse EM micrograph through a euryostomatous stoma showing dorsal tooth (arrowhead) with lumen for dorsal pharyngeal gland secretions. A subventral tooth (arrow) is found in the subventral sector of the stoma. Scale bar, 1 µm. (Image source: Ralf Sommer Lab, Bumbarger13–154.) C,D. DIC comparison of eurystomatous (C) and stenostomatous (D) forms. The eurystomatous form contains an obvious dorsal tooth (arrowhead). (Image source: Erik Ragsdale.)
Figure 8:
P. pacificus young adult hermaphrodite gonad. Unlike in C. elegans, the distal arms of the P. pacificus gonad extend back to the ventral side. Scale bar, 10 µm.
Anteprima