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Descripción

The flat oyster, Ostrea edulis, is the European endemic oyster species. Its production has been reduced because of overfishing and diseases including bonamiosis. Massive mortalities observed on the Pacific cupped oyster these last years explained the wish of shellfish farmers to diversify their production and their revival of interest for this patrimonial oyster species. However, bonamiosis due to the protozoan, Bonamia ostreae, is still a major problem for the production of this species. Measures to control the disease are limited and require a better knowledge of the interactions between the flat oyster and the parasite. Previous studies have suggested the involvement of apoptosis in flat oyster defense mechanisms against B. ostreae. This mechanism is involved in various biological mechanisms including defense against pathogens. In this context, the main objective of this PhD work was to better characterize the involvement of the apoptosis during interactions between the flat oyster and the parasite B. ostreae. In a first step, some tools were developed in order to study the apoptotic process at the cellular level using flow cytometry and microscopy as well as at the molecular level by measuring apoptotic gene expression. In a second step, these tools were used to study O. edulis-B. ostreae interactions in vitro and in vivo. Obtained results confirm the involvement of apoptosis in the response of the flat oyster to B. ostreae and demonstrate the ability of the parasite to inhibit the apoptosis pathway in order to survive and multiply within the hemocytes. Finally, the apoptotic response has been investigated in the flat and Pacific oysters after exposure to diverse micro-organism: OsHV-1, Vibrio aestuarianus and micro-algae.

Pertenece a

ArchiMer, Institutional Archive of Ifremer (French Research Institute for Exploitation of the Sea)  

Autor(es)

Gervais, Ophelie - 

Id.: 71041150

Idioma: fre  -  eng  - 

Versión: 1.0

Estado: Final

Tipo:  application/pdf - 

Palabras claveHuître plate - 

Tipo de recurso: Texto Narrativo  -  Thesis  -  info:eu-repo/semantics/doctoralThesis  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: 2016 Université de La Rochelle

Formatos:  application/pdf - 

Requerimientos técnicos:  Browser: Any - 

Fecha de contribución: 03-mar-2018

Contacto:

Localización:

Otros recursos del mismo autor(es)

  1. Flat oyster follows the apoptosis pathway to defend against the protozoan parasite Bonamia ostreae The in vitro model Ostrea edulis hemocyte - Bonamia ostreae is interesting to investigate host-paras...
  2. Haemocytes collected from experimentally infected Pacific oysters, Crassostrea gigas: Detection of ostreid herpesvirus 1 DNA, RNA, and proteins in relation with inhibition of apoptosis Recent transcriptomic approaches focused on anti-viral immunity in molluscs lead to the assumption t...
  3. Induction of apoptosis by UV in the flat oyster, Ostrea edulis Apoptosis is a fundamental feature in the development of many organisms and tissue systems. It is al...
  4. Etude cellulaire de l’apoptose chez l’huître plate Ostrea edulis en réponse à différents stress L’huître plate (Ostrea edulis) est une espèce endémique des côtes de l’Europe. Sa production a forte...

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