Stramenopile microorganisms associated with the massive coral favia sp.

Siboni, Nachshon, Rasoulouniriana, Diana, Ben-Dov, Eitan, Kramarsky-Winter, Esti, Sivan, Alex, Loya, Yossi, Hoegh-Guldberg, Ove and Kushmaro, Ariel (2010) Stramenopile microorganisms associated with the massive coral favia sp.. Journal of Eukaryotic Microbiology, 57 3: 236-244. doi:10.1111/j.1550-7408.2010.00469.x

Author Siboni, Nachshon
Rasoulouniriana, Diana
Ben-Dov, Eitan
Kramarsky-Winter, Esti
Sivan, Alex
Loya, Yossi
Hoegh-Guldberg, Ove
Kushmaro, Ariel
Title Stramenopile microorganisms associated with the massive coral favia sp.
Journal name Journal of Eukaryotic Microbiology   Check publisher's open access policy
ISSN 1066-5234
ISBN 1066-5234; 1550-7408
Publication date 2010-05
Sub-type Article (original research)
DOI 10.1111/j.1550-7408.2010.00469.x
Volume 57
Issue 3
Start page 236
End page 244
Total pages 9
Place of publication Hoboken, NJ, United States
Publisher Wiley - Blackwell Publishing
Collection year 2011
Language eng
Subject C1
0608 Zoology
0605 Microbiology
970105 Expanding Knowledge in the Environmental Sciences
230106 Real and Complex Functions
Formatted abstract
The surfaces of massive corals of the genus Favia from Eilat, Red Sea, and from Heron Island, Great Barrier Reef, are covered by a layer of eukaryotic microorganisms. These microorganisms are embedded in the coral mucus and tissue. In the Gulf of Eilat, the prevalence of corals covered by patches of eukaryotic microorganisms was positively correlated with a decrease in water temperatures (from 25–28 °C in the summer to 20–23 °C in winter). Comparisons carried out using transmission and scanning electron microscopy showed morphological similarities between the microorganisms from the two geographically distant reefs. The microorganisms found on and in the tissues were approximately 5–15 μm in diameter, surrounded by scales in their cell wall, contained a nucleus, and included unique auto-florescent coccoid bodies of approximately 1 μm. Such morphological characters suggested that these microorganisms are stramenopile protists and in particular thraustochytrids. Molecular analysis, carried out using specific primers for stramenopile 18S rRNA genes, revealed that 90% (111/123) of the clones in the gene libraries were from the Thraustochytriidae. The dominant genera in this family were Aplanochytrium sp., Thraustochytrium sp., and Labyrinthuloides sp. Ten stramenopile strains were isolated and cultured from the corals. Some strains showed ≥97% similarity to clones derived from libraries of mucus-associated microorganisms retrieved directly from these corals. Fatty acid characterization of one of the prevalent strains revealed a high percentage of polyunsaturated fatty acids, including omega-3. The possible association of these stramenopiles in the coral holobiont appeared to be a positive one.
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Keyword Coral mucus
Coral protists
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published May-June 2010.

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Created: Sun, 09 May 2010, 00:03:31 EST