Abstract
When in genetic females external male characters differentiate, the phenomenon is called "male pseudohermaphroditism." This male differentiation occurs in terrestrial isopods (Crustacea, suborder Oniscoidea) and sometimes involves only some epithelial areas (gynandromorphous mosaics). It is not induced by male hormones or by abnormal ovary function. This intersexuality is transmitted maternally (by the intersex females) or paternally (by the brothers of intersex females) to between 30% and 60% of their offspring. Although it occurs at 20 degrees C, the male differentiation disappears when breeding takes place at 27 degrees C. Male characters differentiate in normal females--even in other Oniscoidea species (Porcellio dilatatus, Porcellio laevis, Armadillidium vulgare)--after injection of a 0.22-micron filtered tissue extract. Since an inhibitor of bacterial protein synthesis (gentamycin) does not inhibit this masculinizing effect, we infer that neither organelles nor bacteria are involved. Intersexuality is always correlated with the presence of cytoplasmic viral particles in both intersex-female and transmitter-male tissues. Striking similarities to the Drosophila S virus are noted. A reovirus-like Oniscoidea masculinizing virus, which probably acts only on the epithelial areas sensitive to the male hormones, is most likely the causative agent of this intersexuality. Here we report the conversion of secondary sexual characters putatively caused by a virus.
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- Classification and nomenclature of viruses. Fourth report of the International Committee on Taxonomy of Viruses. Intervirology. 1982;17(1-3):1–199. doi: 10.1159/000149278. [DOI] [PubMed] [Google Scholar]
- Juchault P., Legrand J. J. Intersexualité et monogénie chez les crustacés isopodes terrestres: induction de la thélygénie chez Armadillidium vulgare; facteurs contrôlant le pseudo-hermaphrodisme masculin externe chez Porcellio dilatatus. Ann Endocrinol (Paris) 1970 May-Jun;31(3):525–530. [PubMed] [Google Scholar]
- Legrand J. J., Juchault P. Modification expérimentale de la proportion des sexes chez les crustacés isopodes terrestres: induction de la thélygénie chez Armadillidium vulgare Latr. C R Acad Sci Hebd Seances Acad Sci D. 1970 Feb 2;207(5):706–708. [PubMed] [Google Scholar]
- Louis C., Lopez-Ferber M., Comendador M., Plus N., Kuhl G., Baker S. Drosophila S virus, a hereditary reolike virus, probable agent of the morphological S character in Drosophila simulans. J Virol. 1988 Apr;62(4):1266–1270. doi: 10.1128/jvi.62.4.1266-1270.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
- López-Ferber M., Veyrunes J. C., Croizier L. Drosophila S virus is a member of the Reoviridae family. J Virol. 1989 Feb;63(2):1007–1009. doi: 10.1128/jvi.63.2.1007-1009.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Mari J., Bonami J. R. W2 virus infection of the crustacean Carcinus mediterraneus: a reovirus disease. J Gen Virol. 1988 Mar;69(Pt 3):561–571. doi: 10.1099/0022-1317-69-3-561. [DOI] [PubMed] [Google Scholar]
- Thomas-Orillard M. Modifications of Mean Ovariole Number, Fresh Weight of Adult Females and Developmental Time in DROSOPHILA MELANOGASTER Induced by Drosophila C Virus. Genetics. 1984 Aug;107(4):635–644. doi: 10.1093/genetics/107.4.635. [DOI] [PMC free article] [PubMed] [Google Scholar]