Cited by 79Marine Invertebrate Physiology and EcologyDevelopmental Biology and Gene RegulationCoral and Marine Ecosystems Studies

Gene structure and larval expression of cnox-2Am from the coral Acropora millepora

C. Hayward, David, Catmull, Julian, Reece-Hoyes, John S., Berghammer, Heinrich, Dodd, Heather, Hann, Steven J., Miller, David J., Ball, Eldon E.·2001·Development Genes and Evolution

Abstract

We have cloned a Hox-like gene, cnox-2Am, from a staghorn coral, Acropora millepora, an anthozoan cnidarian, and characterised its embryonic and larval expression. cnox-2Am and its orthologs in other cnidarians and Trichoplax most closely resemble the Gsx and, to a lesser extent, Hox 3/4 proteins. Developmental northern blots and in situ hybridisation are consistent in showing that cnox-2Am message appears in the planula larva shortly after the oral/aboral axis is formed following gastrulation. Expression is localised in scattered ectodermal cells with a restricted distribution along the oral/aboral body axis. They are most abundant along the sides of the cylindrical larva, rare in the oral region and absent from the aboral region. These cells, which on morphological grounds we believe to be neurons, are of two types; one tri-or multipolar near the basement membrane and a second extending projections in both directions from a mid-ectodermal nucleus. Anti-RFamide staining reveals neurons with a similar morphology to the cnox-2Am-expressing cells. However, RFamide-expressing neurons are more abundant, especially at the aboral end of the planula, where there is no cnox-2Am expression. The pattern of expression of cnox-2Am resembles that of Gsx orthologs in Drosophila and vertebrates in being expressed in a spatially restricted portion of the nervous system.

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Crossref · 10.1007/s004270000112

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Authors
C. Hayward, D., Catmull, J., Reece-Hoyes, J. S., Berghammer, H., Dodd, H., Hann, S. J., Miller, D. J., & Ball, E. E.
Affiliations
  • James Cook University (AU)
  • Australian National University (AU)
Corresponding author
Ball, Eldon E.
Venue
Development Genes and Evolution
Published
2001-01
Volume
211
Issue
1
Pages
10-19
ISSN
  • 0043-5546 (ISSN-L)
  • 0949-944X
  • 1432-041X
OpenAlex
W2032159214
Cited by
79
References
43
Citations by year
2026: 2 · 2025: 2 · 2024: 3 · 2023: 1 · 2022: 2 · 2020: 2 · 2019: 1 · 2018: 3 · 2017: 1 · 2016: 1 · 2015: 4 · 2014: 2 · 2012: 3
FWCI
5.40
Type
journal article
Language
en
Open access
closed
Locations
  • Development Genes and Evolution (publishedVersion)
  • PubMed (publishedVersion)
  • ResearchOnline at James Cook University (James Cook University) (submittedVersion)
  • ANU Open Research (Australian National University) (submittedVersion)
Funders
  • James Cook University
  • Australian Research Council
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Marine Invertebrate Physiology and Ecology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Physical Sciences › Environmental Science › Ecology › Coral and Marine Ecosystems Studies
Keywords
Acropora millepora, coral development, planula larvae, larval gene expression, cnidarian nervous system, RFamide, oral-aboral axis, gene structure, Trichoplax
MeSH terms
Amino Acid Sequence, Animals, Cnidaria, Embryo, Nonmammalian, Genes, Homeobox, Immunohistochemistry, Larva, Molecular Sequence Data, Neurons, Neuropeptides, Phylogeny, Blotting, Northern, Protozoan Proteins, Sequence Alignment, In Situ Hybridization, Protein Structure, Tertiary, Homeodomain Proteins, Gene Expression Regulation, Developmental, Embryonic Development

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