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Heterochronic development of lateral plates in the three-spined stickleback induced by thyroid hormone level alterations.
Bolotovskiy, Aleksey A; Levina, Marina A; DeFaveri, Jacquelin; Merilä, Juha; Levin, Boris A.
Afiliación
  • Bolotovskiy AA; Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, Yaroslavl Prov., Russia.
  • Levina MA; Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, Yaroslavl Prov., Russia.
  • DeFaveri J; Ecological Genetics Research Unit, Department of Biosciences, University of Helsinki, Helsinki, Finland.
  • Merilä J; Ecological Genetics Research Unit, Department of Biosciences, University of Helsinki, Helsinki, Finland.
  • Levin BA; Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, Yaroslavl Prov., Russia.
PLoS One ; 13(3): e0194040, 2018.
Article en En | MEDLINE | ID: mdl-29522555
ABSTRACT
The three-spined stickleback Gasterosteus aculeatus is an important model for studying microevolution and parallel adaptation to freshwater environments. Marine and freshwater forms differ markedly in their phenotype, especially in the number of lateral plates, which are serially repeated elements of the exoskeleton. In fishes, thyroid hormones are involved in adaptation to salinity, as well as the developmental regulation of serially repeated elements. To study how thyroid hormones influence lateral plate development, we manipulated levels of triiodothyronine and thiourea during early ontogeny in a marine and freshwater population with complete and low plate phenotypes, respectively. The development of lateral plates along the body and keel was heterochronic among experimental groups. Fish with a low dosage of exogenous triiodothyronine and those treated with thiourea exhibited retarded development of bony plates compared to both control fish and those treated with higher a triiodothyronine dosage. Several triiodothyronine-treated individuals of the marine form expressed the partial lateral plate phenotype. Some individuals with delayed development of lateral plates manifested 1-2 extra bony plates located above the main row of lateral plates.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Triyodotironina / Smegmamorpha / Exoesqueleto Límite: Animals Idioma: En Revista: PLoS One Asunto de la revista: CIENCIA / MEDICINA Año: 2018 Tipo del documento: Article País de afiliación: Rusia

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Triyodotironina / Smegmamorpha / Exoesqueleto Límite: Animals Idioma: En Revista: PLoS One Asunto de la revista: CIENCIA / MEDICINA Año: 2018 Tipo del documento: Article País de afiliación: Rusia
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