Comparative morpho-anatomical studies of the female gonoduct within the Pratylenchidae (Nematoda: Tylenchina)
Abstract The cellular morphology of the gonoduct of six Pratylenchus species, three Pratylenchoides species, Radopholus similis, Zygotylenchus guevarai, Hirschmanniella loofi and Nacobbus aberrans was revealed by dissection and light microscopy. Except for Nacobbus aberrans, all studied species show...
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Published in | Nematology : international journal of fundamental and applied nematological research Vol. 5; no. 2; pp. 293 - 306 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
The Netherlands
Brill
2003
BRILL |
Subjects | |
Online Access | Get full text |
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Summary: | Abstract
The cellular morphology of the gonoduct of six Pratylenchus species, three
Pratylenchoides species, Radopholus similis, Zygotylenchus guevarai,
Hirschmanniella loofi and Nacobbus aberrans was revealed by dissection and
light microscopy. Except for Nacobbus aberrans, all studied species show an
overall similarity in gonoduct construction, i.e., an ovary often ending
with a ring of cells, an oviduct formed from two rows of four cells and a
12-celled spermatheca followed by a tricolumella containing 16-24 cells.
Pratylenchoides magnicauda and Z. guevarai did not diverge from the other
Pratylenchidae in this respect, although their gonoduct differs from that of
Amplimerlinius and Meloidogyne, both formerly postulated as related genera.
The spermatheca structure observed in N. aberrans has not been reported
elsewhere in the Nematoda, although the uterus is similar to that reported
within the Heteroderinae and Meloidogyninae and the uterus comprises more
than 300 cells, enlarging from a tricolumella to a polycolumella.
Transmission electron microscopy of Z. guevarai revealed details of the
cytoplasmatic contact between epithelial cells and the germ cells; a
finger-like ovarian wall cell extension was found penetrating the oocyte.
The oviduct lacks a preformed lumen and comprises eight cells with highly
plicated cell membranes. The spermatheca is constructed from flattened wall
cells and is followed by columnar uterus cells where evidence of eggshell
formation was demonstrated. |
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Bibliography: | href:15685411_005_02_s012_text.pdf ark:/67375/JKT-KNV3Z41G-G istex:2037E24E4D04337EEAC56AE05EB93A6776A3C40F |
ISSN: | 1388-5545 1568-5411 1388-5545 |
DOI: | 10.1163/156854103767139761 |