The Experts below are selected from a list of 90 Experts worldwide ranked by ideXlab platform
Ariel Kushmaro - One of the best experts on this subject based on the ideXlab platform.
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Coral-Associated Heterotrophic Protists
Beneficial Microorganisms in Multicellular Life Forms, 2011Co-Authors: Luba Arotsker, Esti Kramarsky-winter, Ariel KushmaroAbstract:Protists are microscopic eukaryotic microorganisms that are ubiquitous, diverse, and major participants in oceanic food webs and in marine biogeochemical cycles. A survey of protist abundance in waters of coral reef environments was determined to be between 3.5·103 and 7.9·103 protists ml−1. Recent studies showed that live corals harbor Stramenopile protists in and on their tissues. Analyses of large polyped coral species from the Gulf of Eilat (Northern Red Sea) and the Great Barrier Reef revealed numerous colonies with distinct white coatings covering their surface. Upon closer examination, this coating was found to be made up of numerous morphologically distinct microorganisms, containing a nucleus, mitochondria, and golgi complexes. These microorganisms were then characterized using molecular methods and identified as stramenopile protists belonging to the order Labyrinthulida (Kramarsky-Winter et al., 2006); family Thraustochytriidae. Thraustochytrids are a ubiquitous group of microorganisms found in association with marine invertebrates from sponges to echinoderms. One of the distinctive characters of this group is that almost all species develop ectoplasmic extensions from one or more points on the cell and form branched networks. These ectoplasmic nets provide mobility and contain hydrolytic enzymes that are surface-bound or are secreted into the surrounding medium, helping in the digestion of organic material. In addition, members of this group of organisms are known to produce polyunsaturated fatty acids. Therefore, the presence of these microorganisms on the surface of massive and solitary coral species during bleaching events may explain why these corals survive bleaching better than branched species.
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a new thraustochytrid strain fng1 isolated from the surface mucus of the hermatypic coral fungia granulosa
FEMS Microbiology Ecology, 2008Co-Authors: Moshe Harel, Eitan Bendov, Diana Rasoulouniriana, Esti Kramarskywinter, Ze ' Ev Barak, Nachshon Siboni, Yossi Loya, Zeev Wiesman, Ariel KushmaroAbstract:Recent evidence suggests that there is a dynamic microbial biota living on the surface and in the mucus layer of many hermatypic coral species that plays an essential role in coral well-being. Most of the studies published to date emphasize the importance of prokaryotic communities associated with the coral mucus in coral health and disease. In this study, we report the presence of a protist ( Fng1 ) in the mucus of the hermatypic coral Fungia granulosa from the Gulf of Eilat. This protist was identified morphologically and molecularly as belonging to the family Thraustochytridae (phylum Stramenopile , order Labyrinthulida ), a group of heterotrophs widely distributed in the marine environment. Morphological examination of this strain revealed a nonmotile organism c . 35 μm in diameter, which is able to thrive on carbon-deprived media, and whose growth and morphology are inoculum dependent. Its fatty acid production profile revealed an array of polyunsaturated fatty acids. A similar protist was also isolated from the mucus of the coral Favia sp. In light of these findings, its possible contribution to the coral holobiont is discussed.
Eitan Bendov - One of the best experts on this subject based on the ideXlab platform.
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a new thraustochytrid strain fng1 isolated from the surface mucus of the hermatypic coral fungia granulosa
FEMS Microbiology Ecology, 2008Co-Authors: Moshe Harel, Eitan Bendov, Diana Rasoulouniriana, Esti Kramarskywinter, Ze ' Ev Barak, Nachshon Siboni, Yossi Loya, Zeev Wiesman, Ariel KushmaroAbstract:Recent evidence suggests that there is a dynamic microbial biota living on the surface and in the mucus layer of many hermatypic coral species that plays an essential role in coral well-being. Most of the studies published to date emphasize the importance of prokaryotic communities associated with the coral mucus in coral health and disease. In this study, we report the presence of a protist ( Fng1 ) in the mucus of the hermatypic coral Fungia granulosa from the Gulf of Eilat. This protist was identified morphologically and molecularly as belonging to the family Thraustochytridae (phylum Stramenopile , order Labyrinthulida ), a group of heterotrophs widely distributed in the marine environment. Morphological examination of this strain revealed a nonmotile organism c . 35 μm in diameter, which is able to thrive on carbon-deprived media, and whose growth and morphology are inoculum dependent. Its fatty acid production profile revealed an array of polyunsaturated fatty acids. A similar protist was also isolated from the mucus of the coral Favia sp. In light of these findings, its possible contribution to the coral holobiont is discussed.
Moshe Harel - One of the best experts on this subject based on the ideXlab platform.
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a new thraustochytrid strain fng1 isolated from the surface mucus of the hermatypic coral fungia granulosa
FEMS Microbiology Ecology, 2008Co-Authors: Moshe Harel, Eitan Bendov, Diana Rasoulouniriana, Esti Kramarskywinter, Ze ' Ev Barak, Nachshon Siboni, Yossi Loya, Zeev Wiesman, Ariel KushmaroAbstract:Recent evidence suggests that there is a dynamic microbial biota living on the surface and in the mucus layer of many hermatypic coral species that plays an essential role in coral well-being. Most of the studies published to date emphasize the importance of prokaryotic communities associated with the coral mucus in coral health and disease. In this study, we report the presence of a protist ( Fng1 ) in the mucus of the hermatypic coral Fungia granulosa from the Gulf of Eilat. This protist was identified morphologically and molecularly as belonging to the family Thraustochytridae (phylum Stramenopile , order Labyrinthulida ), a group of heterotrophs widely distributed in the marine environment. Morphological examination of this strain revealed a nonmotile organism c . 35 μm in diameter, which is able to thrive on carbon-deprived media, and whose growth and morphology are inoculum dependent. Its fatty acid production profile revealed an array of polyunsaturated fatty acids. A similar protist was also isolated from the mucus of the coral Favia sp. In light of these findings, its possible contribution to the coral holobiont is discussed.
Zeev Wiesman - One of the best experts on this subject based on the ideXlab platform.
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a new thraustochytrid strain fng1 isolated from the surface mucus of the hermatypic coral fungia granulosa
FEMS Microbiology Ecology, 2008Co-Authors: Moshe Harel, Eitan Bendov, Diana Rasoulouniriana, Esti Kramarskywinter, Ze ' Ev Barak, Nachshon Siboni, Yossi Loya, Zeev Wiesman, Ariel KushmaroAbstract:Recent evidence suggests that there is a dynamic microbial biota living on the surface and in the mucus layer of many hermatypic coral species that plays an essential role in coral well-being. Most of the studies published to date emphasize the importance of prokaryotic communities associated with the coral mucus in coral health and disease. In this study, we report the presence of a protist ( Fng1 ) in the mucus of the hermatypic coral Fungia granulosa from the Gulf of Eilat. This protist was identified morphologically and molecularly as belonging to the family Thraustochytridae (phylum Stramenopile , order Labyrinthulida ), a group of heterotrophs widely distributed in the marine environment. Morphological examination of this strain revealed a nonmotile organism c . 35 μm in diameter, which is able to thrive on carbon-deprived media, and whose growth and morphology are inoculum dependent. Its fatty acid production profile revealed an array of polyunsaturated fatty acids. A similar protist was also isolated from the mucus of the coral Favia sp. In light of these findings, its possible contribution to the coral holobiont is discussed.
Diana Rasoulouniriana - One of the best experts on this subject based on the ideXlab platform.
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a new thraustochytrid strain fng1 isolated from the surface mucus of the hermatypic coral fungia granulosa
FEMS Microbiology Ecology, 2008Co-Authors: Moshe Harel, Eitan Bendov, Diana Rasoulouniriana, Esti Kramarskywinter, Ze ' Ev Barak, Nachshon Siboni, Yossi Loya, Zeev Wiesman, Ariel KushmaroAbstract:Recent evidence suggests that there is a dynamic microbial biota living on the surface and in the mucus layer of many hermatypic coral species that plays an essential role in coral well-being. Most of the studies published to date emphasize the importance of prokaryotic communities associated with the coral mucus in coral health and disease. In this study, we report the presence of a protist ( Fng1 ) in the mucus of the hermatypic coral Fungia granulosa from the Gulf of Eilat. This protist was identified morphologically and molecularly as belonging to the family Thraustochytridae (phylum Stramenopile , order Labyrinthulida ), a group of heterotrophs widely distributed in the marine environment. Morphological examination of this strain revealed a nonmotile organism c . 35 μm in diameter, which is able to thrive on carbon-deprived media, and whose growth and morphology are inoculum dependent. Its fatty acid production profile revealed an array of polyunsaturated fatty acids. A similar protist was also isolated from the mucus of the coral Favia sp. In light of these findings, its possible contribution to the coral holobiont is discussed.
