Phenotypic plasticity as a mechanism of cave colonization and adaptation.

Autor:	Bilandžija H; Department of Biology, University of Maryland, College Park, United States.; Department of Molecular Biology, Ruđer Bošković Institute, Zagreb, Croatia., Hollifield B; Department of Biology, University of Maryland, College Park, United States., Steck M; Department of Biology, University of Hawai'i at Mānoa, Honolulu, United States., Meng G; BGI-Shenzhen, Shenzhen, China.; China National GeneBank, BGI-Shenzhen, Shenzhen, China., Ng M; Department of Biology, University of Maryland, College Park, United States., Koch AD; Department of Biology, University of South Dakota, Vermillion, United States., Gračan R; Department of Biology, Faculty of Science, University of Zagreb, Zagreb, Croatia., Ćetković H; Department of Molecular Biology, Ruđer Bošković Institute, Zagreb, Croatia., Porter ML; Department of Biology, University of Hawai'i at Mānoa, Honolulu, United States., Renner KJ; Department of Biology, University of South Dakota, Vermillion, United States., Jeffery W; Department of Biology, University of Maryland, College Park, United States.
Jazyk:	angličtina
Zdroj:	ELife [Elife] 2020 Apr 21; Vol. 9. Date of Electronic Publication: 2020 Apr 21.
DOI:	10.7554/eLife.51830
Abstrakt:	A widely accepted model for the evolution of cave animals posits colonization by surface ancestors followed by the acquisition of adaptations over many generations. However, the speed of cave adaptation in some species suggests mechanisms operating over shorter timescales. To address these mechanisms, we used Astyanax mexicanus , a teleost with ancestral surface morphs (surface fish, SF) and derived cave morphs (cavefish, CF). We exposed SF to completely dark conditions and identified numerous altered traits at both the gene expression and phenotypic levels. Remarkably, most of these alterations mimicked CF phenotypes. Our results indicate that many cave-related traits can appear within a single generation by phenotypic plasticity. In the next generation, plasticity can be further refined. The initial plastic responses are random in adaptive outcome but may determine the subsequent course of evolution. Our study suggests that phenotypic plasticity contributes to the rapid evolution of cave-related traits in A. mexicanus . Competing Interests: HB, BH, MS, GM, MN, AK, RG, HĆ, MP, KR, WJ No competing interests declared (© 2020, Bilandžija et al.)
Databáze:	MEDLINE
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