Cited by 164Developmental Biology and Gene RegulationMarine Invertebrate Physiology and EcologyPlanarian Biology and Electrostimulation

Set‐aside cells in maximal indirect development: Evolutionary and developmental significance

Peterson, Kevin J., Cameron, R. Andrew, Davidson, Eric H.·1997·BioEssays

Abstract

In the maximal form of indirect development found in many taxa of marine invertebrates, embryonic cell lineages of fixed fate and limited division capacity give rise to the larval structures. The adult arises from set‐aside cells in the larva that are held out from the early embryonic specification processes, and that retain extensive proliferative capacity. We review the locations and fates of set‐aside cells in two protostomes, a lophophorate and a deuterostome. The distinct adult body plans of many phyla develop from homologous set‐aside cells within homologous larvae. We argue that the stocks from which these phyla arose utilized these respective larvae, and the diversity of their adult body plans reflects diverse pattern formation processes executed in their set‐aside cell populations. Chordates and arthropods develop directly, but share adult characters with indirectly developing phyla. Thus the deuterostome and protostome stocks that were ancestral to chordates and arthropods, respectively, also utilized maximal indirect development.

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Crossref · 10.1002/bies.950190713

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  • For deuterostomes and lophotrochozoans, maximal indirect development is primitive, and direct development is derived.

    “Many lines of evidence show that for deuterostomes and lophotrochozoans maximal indirect development is primitive, and direct development is derived (36–38).”
  • In maximal indirect development, the adult body plan forms within the larva from special patches of cells set aside during embryogenesis.

    “In maximal indirect development, the adult body plan instead forms within the larva by a complex secondary process from special patches of cells set aside during embryogenesis (1).”
  • Indirect development is primitive for bilaterians.

    “We have discussed elsewhere evidence that has led us and our colleagues to conclude that indirect development is primitive for bilaterians (1, 5).”
  • In maximal indirect development, the embryo produces a larva that bears little relation to the adult body plan, and the adult is formed by a separate postembryonic developmental process.

    “In maximal indirect development, as defined earlier (Davidson et al., 1995;Peterson et al., 1997), the embryo gives rise to a larva that bears little relation to the adult body plan, and the latter is formed by a separate postembryonic developmental process.”

    From Bilaterian Origins: Significance of New Experimental Observations (2000) · cites this paper as Peterson et al., 1997

  • The latest common ancestor of hemichordates and echinoderms would also have expressed Brachyury in its mesodermal set-aside cells.

    “In addition it would have expressed the Brachyury gene in its mesodermal set-aside cells (Peterson et al., 1999a,b), supporting the obvious morphological homology of these cells and their coelomic derivatives (Peterson et al., 1997).”

    From Bilaterian Origins: Significance of New Experimental Observations (2000) · cites this paper as Peterson et al., 1997

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Authors
Peterson, K. J., Cameron, R. A., & Davidson, E. H.
Affiliations
California Institute of Technology (US)
Venue
BioEssays
Publisher
Wiley
Published
1997-07
Volume
19
Issue
7
Pages
623-631
ISSN
  • 0265-9247 (ISSN-L)
  • 1521-1878
OpenAlex
W2091430768
Cited by
164
References
25
Citations by year
2026: 1 · 2025: 3 · 2024: 1 · 2023: 6 · 2022: 8 · 2020: 2 · 2019: 3 · 2018: 3 · 2017: 1 · 2016: 7 · 2015: 7 · 2014: 5 · 2013: 4
FWCI
1.07
Type
journal article
Language
en
Open access
closed
Locations
  • BioEssays (publishedVersion)
  • PubMed (publishedVersion)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion)
Funders
  • National Institutes of Health
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD05753)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Marine Invertebrate Physiology and Ecology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Planarian Biology and Electrostimulation
Keywords
larval development, embryonic cell lineage, pattern formation, protostomes, deuterostomes, lophophorates, chordate evolution, arthropod evolution, body plan evolution
MeSH terms
Animals, Arthropods, Chordata, Nonvertebrate, Biological Evolution, Invertebrates, Larva, Morphogenesis, Phylogeny, Species Specificity, Stem Cells, Cell Lineage

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