Endobacteria in the tentacles of selected cnidarian species and in the cerata of their nudibranch predators

Doepke, Hilke; Herrmann, Karl; Schuett, Christian

doi:10.1007/s10152-011-0245-4

Cited by 10 publications

(16 citation statements)

References 25 publications

(22 reference statements)

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“…Twelve of 13 nudibranch species examined harboured endobacteria inside the cerata epidermis, which corresponds to earlier findings of Doepke et al (2011). No endobacteria could be detected inside of Tritonia hombergi.…”

Section: Endobacteriasupporting

confidence: 89%

“…6). Similar organisms with rough coccoid appearance have been detected earlier in Tubularia indivisa; however, these structures were lacking envelopes (Doepke et al 2011). It cannot be excluded that envelopes were lost during preparation.…”

Section: Bacterial Aggregatessupporting

confidence: 78%

“…The present paper resumes previous reports on endobacteria in nudibranch and cnidarian species (Schuett et al 2007;Schuett and Doepke 2010;Doepke et al 2011) and provides a first comparative scanning microscopic study on symbiotic endobacterial morphotypes detected in the tentacles of cnidarian and in cerata of selected nudibranch species.…”

Section: Introductionsupporting

confidence: 78%

“…The data do not claim for completeness; however, the investigation enables a tentative overview of the morphological diversity of endobacteria in nudibranch cerata tips. These results were compared to those on endobacterial aggregates and dispersed bacteria previously detected in tentacle material of the cnidarians Metridium senile, Sagartia elegans and Tubularia indivisa (Table 2) collected from Scottish diving locations (Schuett et al 2007;Schuett and Doepke 2010;Doepke et al 2011). …”

Section: Resultsmentioning

confidence: 99%

“…Micrograph documentation of epidermis regions was conducted by using SEM Hitachi S-800. Complete details are given in Doepke et al (2011).…”

Section: Methodsmentioning

confidence: 99%

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Endobacterial morphotypes in nudibranch cerata tips: a SEM analysis

Schuett

Doepke

2012

Helgol Mar Res

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The SEM investigation of nudibranch cerata material exhibits endobacterial morphotypes found in 12 out of 13 species tested: Aeolidia papillosa, Berghia caerulescens, Coryphella brownii, Coryphella lineata, Coryphella verrucosa, Cuthona amoena, Facelina coronata, Flabellina pedata, Dendronotus frondosus, Doto coronata, Tritonia plebeia and Janolus cristatus. Endobacteria could not be detected inside Tritonia hombergi. Endobacterial morphology found inside nudibranch species was compared to bacterial morphotypes detected earlier in tentacles of cnidarian species. SEM micrographs show endobacterial analogy among nudibranch species, but also similarity to cnidarian endobacteria investigated earlier. Of course, morphological data of microbes do not allow their identification. However, since most of these nudibranch species prey on cnidaria, it cannot be excluded that many of the endobacteria detected inside nudibranch species may originate from their cnidarian prey. Our previous data describing genetic affiliation of endobacteria from nudibranchian and cnidarian species support this assumption. Dominant coccoid endobacteria mostly exhibit smooth surface and are tightly packed as aggregates and/or wrapped in envelopes. Such bacterial aggregate type has been described previously in tentacles of the cnidarian species Sagartia elegans. Similar coccoid bacteria, lacking envelopes were also found in other nudibranch species. A different type of coccoid bacteria, characterized by a rough surface, was detected inside cerata of the nudibranch species Berghia caerulescens, and surprisingly, inside tentacles of the cnidarian species Tubularia indivisa. In contrast to cnidarian endobacteria, rod-shaped microorganisms are largely absent in nudibranch cerata.

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Section: Endobacteriasupporting

confidence: 89%

Section: Bacterial Aggregatessupporting

confidence: 78%

Section: Introductionsupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

“…Micrograph documentation of epidermis regions was conducted by using SEM Hitachi S-800. Complete details are given in Doepke et al (2011).…”

Section: Methodsmentioning

confidence: 99%

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Endobacterial morphotypes in nudibranch cerata tips: a SEM analysis

Schuett

Doepke

2012

Helgol Mar Res

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The Family Rhodobacteraceae

et al. 2014

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Exploring Prokaryotic Communities in the Guts and Mucus of Nudibranchs, and Their Similarity to Sediment and Seawater Microbiomes

Stuij¹,

Cleary²,

Polónia³

et al. 2023

Curr Microbiol

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In the present study, we compared mucus and gut-associated prokaryotic communities from seven nudibranch species with sediment and seawater from Thai coral reefs using high-throughput 16S rRNA gene sequencing. The nudibranch species were identified as Doriprismatica atromarginata (family Chromodorididae), Jorunna funebris (family Discodorididae), Phyllidiella nigra, Phyllidiella pustulosa, Phyllidia carlsonhoffi, Phyllidia elegans, and Phyllidia picta (all family Phyllidiidae). The most abundant bacterial phyla in the dataset were Proteobacteria, Tenericutes, Chloroflexi, Thaumarchaeota, and Cyanobacteria. Mucus and gut-associated communities differed from one another and from sediment and seawater communities. Host phylogeny was, furthermore, a significant predictor of differences in mucus and gut-associated prokaryotic community composition. With respect to higher taxon abundance, the order Rhizobiales (Proteobacteria) was more abundant in Phyllidia species (mucus and gut), whereas the order Mycoplasmatales (Tenericutes) was more abundant in D. atromarginata and J. funebris. Mucus samples were, furthermore, associated with greater abundances of certain phyla including Chloroflexi, Poribacteria, and Gemmatimonadetes, taxa considered to be indicators for high microbial abundance (HMA) sponge species. Overall, our results indicated that nudibranch microbiomes consisted of a number of abundant prokaryotic members with high sequence similarities to organisms previously detected in sponges.

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Endobacteria in the tentacles of selected cnidarian species and in the cerata of their nudibranch predators

Cited by 10 publications

References 25 publications

Endobacterial morphotypes in nudibranch cerata tips: a SEM analysis

Endobacterial morphotypes in nudibranch cerata tips: a SEM analysis

The Family Rhodobacteraceae

Exploring Prokaryotic Communities in the Guts and Mucus of Nudibranchs, and Their Similarity to Sediment and Seawater Microbiomes

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