Human and marine parasites : the same battle ? (or how to look for markers of "parasitic lifestyle" in the marine biodiversity - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Human and marine parasites : the same battle ? (or how to look for markers of "parasitic lifestyle" in the marine biodiversity

Parasites humaines et marins : la même bataille ? (ou comment chercher des signatures d'une "vie parasite" dans la biodiversité marine)

Résumé

In nature, no species exists in complete isolation from others. On the contrary, partnerships between species are essential to the balance of ecosystems. Among these interactions, parasitism is probably one of the most widespread in nature. The onset of parasitism has taken place several times through the tree of life, often leading to a reduction in genome size and sometimes even in the number of genes initially present in the common ancestral genetic pool. Intracellular vertebrate parasites responsible for human and veterinary diseases are prime targets for studying how environmental constraints have shaped the parasite genomes over the course of evolution toward increasingly specialized and host-dependent forms. But … what about marine microbes? The microbial component of the oceans represents more than 60% of the biomass of the global ocean and more than 80% of the biomass of the water column. These organisms deploy numerous interactions and survival strategies that contrast with those of macroscopic organisms. Their parasites are extremely virulent compared to parasites of larger metazoans, and must adapt at a significantly faster rate than for larger hosts such as plants or animals … Has this process evolved independently in each lineage or, conversely, is it possible to find common effectors involved in host-parasite interactions? and similar strategies for infection and maintenance within the host? An important part of the drivers of genetic diversity, allowing a better understanding of the transition from a free-living to a parasitic life stage, remains to be discovered in ecological niches such as the planktonic community.
Fichier non déposé

Dates et versions

hal-04402945 , version 1 (18-01-2024)

Identifiants

  • HAL Id : hal-04402945 , version 1

Citer

Betina Porcel. Human and marine parasites : the same battle ? (or how to look for markers of "parasitic lifestyle" in the marine biodiversity. Conférences Jacques-Monod : Des parasites au plancton et inversement: biologie comparée et écologie des apicomplexes et des dinoflagellés, Sep 2022, Roscoff (29680), France. ⟨hal-04402945⟩
11 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More