Tags

Type your tag names separated by a space and hit enter

The cellular basis of the aggressive acrorhagial response of sea anemones.
J Morphol. 1982 Sep; 173(3):259-278.JM

Abstract

Some sea anemones possess structures called acrorhagi at the base of the tentacles. The acrorhagi are utilized solely for aggression. Acrorhagial aggression involves very exquisite intra- and interspecific recognition. This study examined acrorhagi and putative acrorhagial analogues or homologues in four species of sea anemone. The morphology and ultrastructure of tentacles, pseudoacrorhagi, column vesicles, and verrucae (adhesive column vesicles) differed from that of acrorhagi. Coral capitate tentacles and acrorhagi have different surface morphology, nematocysts, and functions. Besed on morphology, acrorhagi seem more likely to be homologous to tentacles than to verrucae. Acrorhagial nematocyst discharge and ectodermal peeling, the culmination of the response, were shown to require prior acrorhagial expansion in Anthopleura krebsi and Bunodosoma cavernata. A mechanical mechanism is suggested where- by distention of the acrorhagus opens a ciliary pit on the nematocyte surface and exposes the pit wall and microvilli, which may contain the chemoreceptors for the peeling process, including nematocyst discharge. A similar system may also be responsible for changing the threshold of nematocyst discharge in sea anemone tentacles. A case of possible neurosecretion in an anthozoan was also shown in this study.

Authors+Show Affiliations

Department of Biological Science, Florida State University, Tallahassee, Florida and Immunogenetics Group, UCLA School of Medicine and Dental Research Institute, Los Angeles, California 90024.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30096973

Citation

Bigger, Charles H.. "The Cellular Basis of the Aggressive Acrorhagial Response of Sea Anemones." Journal of Morphology, vol. 173, no. 3, 1982, pp. 259-278.
Bigger CH. The cellular basis of the aggressive acrorhagial response of sea anemones. J Morphol. 1982;173(3):259-278.
Bigger, C. H. (1982). The cellular basis of the aggressive acrorhagial response of sea anemones. Journal of Morphology, 173(3), 259-278. https://doi.org/10.1002/jmor.1051730303
Bigger CH. The Cellular Basis of the Aggressive Acrorhagial Response of Sea Anemones. J Morphol. 1982;173(3):259-278. PubMed PMID: 30096973.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The cellular basis of the aggressive acrorhagial response of sea anemones. A1 - Bigger,Charles H, PY - 2018/8/12/entrez PY - 1982/9/1/pubmed PY - 1982/9/1/medline SP - 259 EP - 278 JF - Journal of morphology JO - J Morphol VL - 173 IS - 3 N2 - Some sea anemones possess structures called acrorhagi at the base of the tentacles. The acrorhagi are utilized solely for aggression. Acrorhagial aggression involves very exquisite intra- and interspecific recognition. This study examined acrorhagi and putative acrorhagial analogues or homologues in four species of sea anemone. The morphology and ultrastructure of tentacles, pseudoacrorhagi, column vesicles, and verrucae (adhesive column vesicles) differed from that of acrorhagi. Coral capitate tentacles and acrorhagi have different surface morphology, nematocysts, and functions. Besed on morphology, acrorhagi seem more likely to be homologous to tentacles than to verrucae. Acrorhagial nematocyst discharge and ectodermal peeling, the culmination of the response, were shown to require prior acrorhagial expansion in Anthopleura krebsi and Bunodosoma cavernata. A mechanical mechanism is suggested where- by distention of the acrorhagus opens a ciliary pit on the nematocyte surface and exposes the pit wall and microvilli, which may contain the chemoreceptors for the peeling process, including nematocyst discharge. A similar system may also be responsible for changing the threshold of nematocyst discharge in sea anemone tentacles. A case of possible neurosecretion in an anthozoan was also shown in this study. SN - 1097-4687 UR - https://www.unboundmedicine.com/medline/citation/30096973/The_cellular_basis_of_the_aggressive_acrorhagial_response_of_sea_anemones_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0362-2525&date=1982&volume=173&issue=3&spage=259 DB - PRIME DP - Unbound Medicine ER -
Try the Free App:
Prime PubMed app for iOS iPhone iPad
Prime PubMed app for Android
Prime PubMed is provided
free to individuals by:
Unbound Medicine.