The current molecular phylogeny of Eutherian mammals challenges previous interpretations of placental evolution.

Détails

ID Serval
serval:BIB_103E1F4B8961
Type
Article: article d'un périodique ou d'un magazine.
Sous-type
Synthèse (review): revue aussi complète que possible des connaissances sur un sujet, rédigée à partir de l'analyse exhaustive des travaux publiés.
Collection
Publications
Institution
Titre
The current molecular phylogeny of Eutherian mammals challenges previous interpretations of placental evolution.
Périodique
Placenta
Auteur(s)
Vogel P.
ISSN
0143-4004 (Print)
ISSN-L
0143-4004
Statut éditorial
Publié
Date de publication
10/2005
Volume
26
Numéro
8-9
Pages
591-596
Langue
anglais
Notes
Publication types: Journal Article ; Review
Publication Status: ppublish
Résumé
Based on histology, the placentae of eutherians are currently grouped in epitheliochorial, endotheliochorial and haemochorial placentae. In a haeckelian sense, the epitheliochorial contact with marked histiotrophic feeding by uterine milk is generally considered as primitive, especially since similar contacts exist in Marsupials. In contrast, the more intimate endotheliochorial and haemochorial contact, facilitating haemotrophic nutrition, is interpreted as a derived state. A cladistic analysis based on the phylogenetic relationships established by molecular analyses reveals that the basic clades are all characterized by an endotheliochorial or haemochorial placenta, and that the epitheliochorial placenta evolved at least three times in a convergent manner. This evolution may be explained by the fact that the epitheliochorial placenta in eutherians is more efficient in nutritional transfer (flow rate by exchange surface). Moreover, this arrangement may confer an advantage to the mother who can probably reduce the degree of manipulation by a genetically imprinted embryo.
Mots-clé
Animals, Evolution, Molecular, Female, Genomic Imprinting, Mammals/anatomy & histology, Mammals/classification, Maternal-Fetal Exchange/physiology, Phylogeny, Placenta/anatomy & histology, Placenta/physiology, Pregnancy
Pubmed
Web of science
Création de la notice
24/01/2008 18:32
Dernière modification de la notice
20/08/2019 13:37
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