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Gene expression and larval evolution: changing roles of distal-less and orthodenticle in echinoderm larvae.

Publication ,  Journal Article
Lowe, CJ; Issel-Tarver, L; Wray, GA
Published in: Evolution & development
March 2002

We describe the expression of the homeobox genes orthodenticle (Otx) and distal-less (Dlx) during the larval development of seven species representing three classes of echinoderms: Holothuroidea, Asteroidea, and Echinoidea. Several expression domains are conserved between species within a single class, including Dlx expression within the brachiolar arms of asteroid larvae and Otx expression within the ciliated bands of holothuroid larvae. Some expression domains are apparently conserved between classes, such as the expression of Dlx within the hydrocoel (left mesocoel) in all three classes. However, several substantial differences in expression domains among taxa were also evident for both genes. Some autapomorphic (unique derived) features of gene expression are phylogenetically associated with autapomorphic structures, such as Dlx expression within the invaginating rudiment of euechinoids. Other autapomorphic gene expression domains are associated with evolutionary shifts in life history from feeding to nonfeeding larval development, such as Otx expression within the ciliated bands of a nonfeeding holothuroid larva. Similar associations between evolutionary changes in morphology and life history mode with changes in regulatory gene expression have also been observed in arthropods, urochordates, and chordates. We predict that recruitment of regulatory genes to a new developmental role is commonly associated with evolutionary changes in morphology and may be particularly common in clades with complex life cycles and diversity of life history modes. Caution should be used when making generalizations about gene expression and function based on a single species, which may not accurately reflect developmental processes and life histories of the phyla to which it belongs.

Duke Scholars

Published In

Evolution & development

DOI

EISSN

1525-142X

ISSN

1520-541X

Publication Date

March 2002

Volume

4

Issue

2

Start / End Page

111 / 123

Related Subject Headings

  • Phylogeny
  • Larva
  • Homeodomain Proteins
  • Gene Expression Regulation
  • Echinodermata
  • Drosophila Proteins
  • Developmental Biology
  • Cilia
  • Biological Evolution
  • Animals
 

Citation

APA
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ICMJE
MLA
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Lowe, C. J., Issel-Tarver, L., & Wray, G. A. (2002). Gene expression and larval evolution: changing roles of distal-less and orthodenticle in echinoderm larvae. Evolution & Development, 4(2), 111–123. https://doi.org/10.1046/j.1525-142x.2002.01066.x
Lowe, Christopher J., Laurie Issel-Tarver, and Gregory A. Wray. “Gene expression and larval evolution: changing roles of distal-less and orthodenticle in echinoderm larvae.Evolution & Development 4, no. 2 (March 2002): 111–23. https://doi.org/10.1046/j.1525-142x.2002.01066.x.
Lowe CJ, Issel-Tarver L, Wray GA. Gene expression and larval evolution: changing roles of distal-less and orthodenticle in echinoderm larvae. Evolution & development. 2002 Mar;4(2):111–23.
Lowe, Christopher J., et al. “Gene expression and larval evolution: changing roles of distal-less and orthodenticle in echinoderm larvae.Evolution & Development, vol. 4, no. 2, Mar. 2002, pp. 111–23. Epmc, doi:10.1046/j.1525-142x.2002.01066.x.
Lowe CJ, Issel-Tarver L, Wray GA. Gene expression and larval evolution: changing roles of distal-less and orthodenticle in echinoderm larvae. Evolution & development. 2002 Mar;4(2):111–123.
Journal cover image

Published In

Evolution & development

DOI

EISSN

1525-142X

ISSN

1520-541X

Publication Date

March 2002

Volume

4

Issue

2

Start / End Page

111 / 123

Related Subject Headings

  • Phylogeny
  • Larva
  • Homeodomain Proteins
  • Gene Expression Regulation
  • Echinodermata
  • Drosophila Proteins
  • Developmental Biology
  • Cilia
  • Biological Evolution
  • Animals