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- W1990982364 abstract "Abstract In many marine invertebrates with biphasic life cycles, juvenile/adult traits begin to develop before metamorphosis. For structures that are present at multiple developmental stages, but have distinct larval and adult forms, it is unclear whether larval and adult structures have shared or distinct developmental origins. In this study, we examine the relationship between the larval and adult eyes in the polychaete Capitella teleta . In addition, we describe a novel marker for larval and juvenile photoreceptor cells. Infrared laser deletion of individual micromeres in early embryos suggests that the same micromeres at the eight‐cell stage that are specified to generate the larval eyes also form the adult eyes. Direct deletion of the larval eye, including the pigment cell and the corresponding photoreceptor cell, resulted in a lack of shading pigment cells in juveniles and adults, demonstrating that this structure does not regenerate. However, a sensory photoreceptor cell was present in juveniles following direct larval eye deletions, indicating that larval and adult photoreceptors are separate cells. We propose that the formation of the adult eye in juveniles of C. teleta requires the presence of the pigment cell of the larval eye, but the adult photoreceptor is either recruited from adjacent neural tissue or arises de novo after metamorphosis. These results are different from the development and spatial orientation of larval and adult eyes found in other polychaetes, in which two scenarios have been proposed: larval eyes persist and function as adult eyes; or, distinct pigmented adult eyes begin developing separately from larval eyes prior to metamorphosis." @default.
- W1990982364 created "2016-06-24" @default.
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- W1990982364 date "2013-09-12" @default.
- W1990982364 modified "2023-10-11" @default.
- W1990982364 title "The importance of larval eyes in the polychaete<i>Capitella teleta</i>: effects of larval eye deletion on formation of the adult eye" @default.
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- W1990982364 doi "https://doi.org/10.1111/ivb.12034" @default.
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