4.7 Article

The evolution of neurosensation provides opportunities and constraints for phenotypic plasticity

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SCIENTIFIC REPORTS
卷 12, 期 1, 页码 -

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NATURE PORTFOLIO
DOI: 10.1038/s41598-022-15583-y

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  1. State University of New Jersey

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This study traces the evolution of pre-feeding phenotypic plasticity in regular sea urchins using molecular mechanisms. It finds that the neurosensory foundation for plasticity is ancestral within echinoids, but the coincident development of the plastic trait and neurosensory system occurs in regular urchins. The study also reveals that plasticity continues to evolve in urchins, often associated with losses of sensory abilities and neurons.
Phenotypic plasticity is widely regarded as important for enabling species resilience to environmental change and for species evolution. However, insight into the complex mechanisms by which phenotypic plasticity evolves in nature is limited by our ability to reconstruct evolutionary histories of plasticity. By using part of the molecular mechanism, we were able to trace the evolution of pre-feeding phenotypic plasticity across the class Echinoidea and identify the origin of plasticity at the base of the regular urchins. The neurosensory foundation for plasticity was ancestral within the echinoids. However, coincident development of the plastic trait and the neurosensory system was not achieved until the regular urchins, likely due to pleiotropic effects and linkages between the two colocalized systems. Plasticity continues to evolve within the urchins with numerous instances of losses associated with loss of sensory abilities and neurons, consistent with a cost of maintaining these capabilities. Thus, evidence was found for the neurosensory system providing opportunities and constraints to the evolution of phenotypic plasticity.

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