An immunocytochemical window into the development of Platynereis massiliensis (Annelida, Nereididae) - Adaptation et Biologie des Invertébrés en Conditions Extrêmes Accéder directement au contenu
Article Dans Une Revue International Journal of Developmental Biology Année : 2014

An immunocytochemical window into the development of Platynereis massiliensis (Annelida, Nereididae)

Résumé

The nereidid annelid Platynereis dumerilii emerged as a well-understood model organism. P dumerilii and P massiliensis are sister taxa, which are morphologically indistinguishable as adults. InterestinglY,they exhibit highly contrasting life-histories: while Pdumeriliiis a gonochorostic species with planktonic feeding larvae, P massiliensis is a protandric hermaphrodite with lecitotrophic semi-direct -development in brood tubes. Using light microscopy and immunohistochemical methods coupled with confocal laser scanning microscopy, we describe the development of P massiliensis. Musculature was stained with phalloidin-rhodamine. FMRFamide, acetylated cr-tubulin, and serotonin were targeted by antibodies for the staining of neuronal structures. Additionally, eye development was investigated with the specific 22C10-antibody.The development of P massiliensis is characterized by the absence of a free-swimming stage, a late development of food uptake, and the presence of a large amount of yolk even in late juvenile stages. Most notably, early juvenile stages already exhibit an organization of several organ systems that resembles those of adults. Larval characters present in the free-swimming feeding larvae of P dumerilii, as e.g. the apical organ and larval eyes, are absent and regarded to be lost in developing stages of P massiliensis. Many of the differences found in the development of these two species can be described in the context of heterochronic changes.We strongly advocate expanding evolutionary developmental studies from the well-established model annelid P dumerilii to the closely related P massiliensis to study the evolutionary conservation and divergence of genetic pathways involved in developmental processes.
Fichier principal
Vignette du fichier
ft613.pdf (5.15 Mo) Télécharger le fichier
Origine : Publication financée par une institution
Loading...

Dates et versions

hal-01250905 , version 1 (11-01-2016)

Licence

Paternité

Identifiants

Citer

Conrad Helm, Helge Adamo, Stéphane Hourdez, Christoph Bleidorn. An immunocytochemical window into the development of Platynereis massiliensis (Annelida, Nereididae). International Journal of Developmental Biology, 2014, 58 (6-8), pp.613-622. ⟨10.1387/ijdb.140081cb⟩. ⟨hal-01250905⟩
415 Consultations
220 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More