+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Carbon metabolism and strobilation in cassiopea andromeda cnidaria scyphozoa significance of endo symbiotic dinoflagellates

Carbon metabolism and strobilation in cassiopea andromeda cnidaria scyphozoa significance of endo symbiotic dinoflagellates

Marine Biology (Berlin) 65(1): 25-34

Scyphopolyps and scyphomedusae of C. andromeda Forskal (Cnidaria, Scyphozoa) containing dinoflagellate endosymbionts (zooxanthellae) were investigated for rates and pathways of C fixation. Photosynthesis by the algae, accounting for 80 and 15 .mu.mol C h-1 on a dry weight basis in medusae and polyps, respectively, by far exceeds dark incorporation of inorganic carbon by the intact association. Photosynthetic carbon fixation is operated via C3 pathway of C reduction. DCMU[3-(3,4-Dichlorophenyl)-1,1-dimethylurea]-treatment (1 .times. 10-6 M and 1 .times. 10-5 M) completely inhibits light-dependent C assimilation. Major photosynthates presumably involved in a metabolite flow from algal symbionts to animal tissue are glycerol and glucose. A total of 5-10% net algal photosynthate appears to be released in vivo to the host. This is probably less than the energy supply ultimately required for the nutrition of the polyps and medusae. The presence of zooxanthellae proved to be indispensable for strobilation in the scyphopolyps. Photosynthesis by algal symbionts and photosynthate release is obviously not essential for the initiation of ephyrae as is shown by DCMU-treatment, culture in continuous darkness, and aposymbiotic controls. Strobilation is supported, but not triggered by algal photosynthetic activity. The induction of strobilation thus seems to depend on a more complex system of regulation.

(PDF emailed within 0-6 h: $19.90)

Accession: 004877855

Download citation: RISBibTeXText

DOI: 10.1007/bf00397064

Related references

Carbon metabolism and strobilation in Cassiopea andromedea (Cnidaria: Scyphozoa): significance of endosymbiotic dinoflagellates. Marine Biology (Berlin): 651: 25-33, 1981

Strobilation budding and initiation of scyphistoma morphogenesis in the rhizostome cassiopea andromeda cnidaria scyphozoa. Marine Biology (Berlin) 47(2): 161-176, 1978

The cnidomes of Cassiopea andromeda Forskal, 1775, and Cassiopea xamachana Bigelow, 1882 (Cnidaria: Scyphozoa). Unknown, 1997

Bud formation and metamorphosis in cassiopea andromeda cnidaria scyphozoa a developmental and ultrastructural study. Marine Biology (Berlin) 105(3): 509-518, 1990

Control of head morphogenesis in an invertebrate asexually produced larva-like bud ( Cassiopea andromeda; Cnidaria: Scyphozoa). Development Genes and Evolution 213(3): 127-133, 2003

Bacterial induction of settlement and metamorphosis in the planula larvae of Cassiopea andromeda Cnidaria Scyphozoa, Rhizostomeae. Marine Ecology Progress Series, 11: 21-28, 1979

Requirement of exogenous inducers for metamorphosis of axenic larvae and buds of cassiopea andromeda cnidaria scyphozoa. Marine Biology (Berlin) 94(3): 415-422, 1987

Bioaccumulation of heavy metals and radionuclides in the jellyfish Cassiopea andromeda and Aurelia aurita Cnidaria, Scyphozoa. Rapport du Congress de la CIESM 36, 2001

A new record of an alien jellyfish from the Levantine coast of Turkey - Cassiopea andromeda Forsskal, 1775 Cnidaria Scyphozoa Rhizostomea. Aquatic Invasions. September; 13: 196-197, 2006

Preliminary Study on Nematocyst Types and Venom Isolation of Cassiopea andromeda Forskål, 1775 (Scyphozoa, Cnidaria) from Turkey. Central Nervous System Agents in Medicinal Chemistry (): -, 2015

Die Zooxanthellen bei Cassiopea andromeda Eschscholtz 1829 (Polyp-Stadium) und ihre Bedeutung fur die Strobilation. Zoologische Jahrbuecher (Anatomie): 86: 238-277, 1969

Bud formation and control of polyp morphogenesis in Cassiopea andromeda (Scyphozoa). 1980

First record of Cassiopea andromeda Scyphozoa Rhizostomeae Cassiopeidae from the central Mediterranean Sea. Marine Biodiversity Records 3, 2010

Effect of symbiotic zooxanthellae and temperature on budding and strobilation in cassiopeia andromeda. Biological Bulletin (Woods Hole) 159(2): 394-401, 1980