FN Archimer Export Format PT J TI Substantial gene expression shifts during larval transitions in the pearl oyster Pinctada margaritifera BT AF DESTANQUE, Thibault Le Luyer, Jeremy Quillien, Virgile Sham Koua, Manaarii AUFFRET, Pauline KY, Chin-Long AS 1:1;2:1,2;3:1,2;4:1;5:1,3;6:1,4; FF 1:PDG-RBE-RMPF;2:PDG-RBE-PHYTNESS;3:PDG-RBE-PHYTNESS;4:PDG-RBE-RMPF;5:PDG-IRSI-SEBIMER;6:PDG-RBE-IHPE; C1 Ifremer, IRD, Institut Louis‐Malardé, Univ Polynésie française EIO Polynésie française ,France Ifremer, CNRS, IRD, LEMAR Univ Brest Brest, France Ifremer, Sebimer Brest ,France Ifremer, UMR 5244 Interactions Hôtes‐Pathogènes‐Environnements Universités de Montpellier Montpellier ,France C2 IFREMER, FRANCE IFREMER, FRANCE IFREMER, FRANCE IFREMER, FRANCE SI TAHITI BREST MONTPELLIER SE PDG-RBE-RMPF PDG-RBE-PHYTNESS PDG-IRSI-SEBIMER PDG-RBE-IHPE UM LEMAR IHPE EIO IF 2.2 TC 0 UR https://archimer.ifremer.fr/doc/00876/98828/108471.pdf https://archimer.ifremer.fr/doc/00876/98828/108472.png https://archimer.ifremer.fr/doc/00876/98828/108473.xlsx https://archimer.ifremer.fr/doc/00876/98828/108474.csv LA English DT Article DE ;biomineralization;environmental sensing;immune system;larval development;Pinctada margaritifera;RNA-seq AB Early development stages in marine bivalve are critical periods where larvae transition from pelagic free‐life to sessile mature individuals. The successive metamorphosis requires the expression of key genes, the functions of which might be under high selective pressure, hence understanding larval development represents key knowledge for both fundamental and applied research. Phenotypic larvae development is well known, but the underlying molecular mechanisms such as associated gene expression dynamic and molecular cross‐talks remains poorly described for several nonmodel species, such as P. margaritifera. We designed a whole transcriptome RNA‐sequencing analysis to describe such gene expression dynamics following four larval developmental stages:  d‐shape, Veliger, Umbo and Eye‐spot. Larval gene expression and annotated functions drastically diverge. Metabolic function (gene expression related to lipid, amino acid and carbohydrate use) is highly upregulated in the first development stages, with increasing demand from  d‐shape to umbo. Morphogenesis and larval transition are partly ordered by Thyroid hormones and Wnt signaling. While larvae shells show some similar characteristic to adult shells, the cause of initialization of biomineralization differ from the one found in adults. The present study provides a global overview of Pinctada margaritifera larval stages transitioning through gene expression dynamics, molecular mechanisms and ontogeny of biomineralization, immune system, and sensory perception processes. PY 2024 PD MAR SO Journal of Experimental Zoology Part B: Molecular and Developmental Evolution SN 1552-5007 PU Wiley VL 342 IS 2 BP 76 EP 84 DI 10.1002/jez.b.23243 ID 98828 ER EF