Chemical Ecology of Bacterial Volatiles

Schulz, Stefan; Biwer, Peter; Harig, Tim; Koteska, Diana; Schlawis, Christian

doi:10.1016/b978-0-12-409547-2.14817-6

Cited by 7 publications

(9 citation statements)

References 228 publications

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“…This cannot be said with certainty for the apocarotenoids 4-8, as they were specific for the xenic strain. Nevertheless, apocarotenoids are relatively rarely observed as volatiles of bacteria except for cyanobacteria [50,116]. In contrast, algae seem to readily release apocarotenoids as discussed here.…”

Section: Function Of the Identified Volatilesmentioning

confidence: 67%

Identification of Volatiles of the Dinoflagellate Prorocentrum cordatum

et al. 2022

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The dinoflagellate Prorocentrum cordatum, often called P. minimum, is a potentially toxic alga found in algal blooms. Volatile compounds released by the alga might carry important information, e.g., on its physiological state, and may act as chemical messengers. We report here the identification of volatile organic compounds emitted by two strains, xenic P. cordatum CCMP 1529 and axenic P. cordatum CCMP 1329. The volatiles released during culture were identified despite their low production rates, using sensitive methods such as open-system-stripping analysis (OSSA) on Tenax TA desorption tubes, thermodesorption, cryofocusing and GC/MS-analysis. The analyses revealed 16 compounds released from the xenic strain and 52 compounds from the axenic strain. The majority of compounds were apocarotenoids, aromatic compounds and small oxylipins, but new natural products such as 3,7-dimethyl-4-octanolide were also identified and synthesized. The large difference of compound composition between xenic and axenic algae will be discussed.

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Section: Function Of the Identified Volatilesmentioning

confidence: 67%

Identification of Volatiles of the Dinoflagellate Prorocentrum cordatum

et al. 2022

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“…It was found that 2‐heptanone and 3‐hexanone were not possible chemical indicators of decomposition for any species, while others (2‐butanone, 2‐nonanone, 2‐pentanone, 2‐undecanone, 3‐pentanone, and 3‐methyl‐2‐butanone) could be chemical indicators for certain species. The pathways leading to their formation have been reviewed previously (Kawai & Sakaguchi, 1996; Schulz et al., 2020).…”

Section: Resultsmentioning

confidence: 99%

Large volume headspace GC/MS analysis for the identification of volatile compounds relating to seafood decomposition

Wang

Jager

Begley

et al. 2022

Food Science & Nutrition

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Decomposition in seafood products in the United States is monitored by the Food and Drug Administration (FDA) laboratories using sensory testing, which requires highly trained analysts. A large‐volume headspace (LVHS) gas chromatography/mass spectrometry (GC/MS) method was developed to generate analytical results that can be directly compared to sensory evaluation. Headspace vapor was withdrawn from a 1‐L vial containing 50 g seafood sample using a large volume headspace autosampler. Various volatile compounds were collected simultaneously. Analytes were preconcentrated by a capillary column trapping system and then sent through a cryo‐focuser mounted onto the GC injector. A selected ion monitoring (SIM) MS acquisition method was used to selectively monitor 38 compounds of interest. Samples of red snapper, croaker, weakfish, mahi‐mahi, black tiger shrimp, yellowfin tuna, and sockeye salmon that have been assessed and scored by an FDA National Seafood Sensory Expert (NSSE) were used for method performance evaluation. Characteristic compounds potentially associated with seafood quality deterioration for each seafood species were identified by quantitative analysis using pooled matrix‐matched calibrations and two‐sample t‐test statistical analysis. Classification of fresh and decomposed samples was visualized on the analysis of variance (ANOVA)–principal component analysis (PCA) score plots. The results determined that the LVHS‐GC/MS technique appeared promising as a screening tool to identify compounds representative of sensory analysis.

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“…[50] Amides were specific to the investigated bacteria. The aliphatic amides N-isobutylacetamide (33), N-2-methylbutylacetamide (34) and N-isopentylacetamide (35) were detected in some of the strains in low amounts. These amides were occasionally reported from bacteria (35), [51,52] including marine actinomycete Salinispora pacifica.…”

Section: Aliphatic Compoundsmentioning

confidence: 99%

“…Furthermore, abundant sulfides 28 and 29 were emitted, which were surprisingly not detected in the analysed bacteria, although they constitute very common volatiles of other bacteria. [9,[32][33][34][35] The analysis of the four bacteria did not show much similarity with respect to the emitted compounds. While A. albus A01A-324 produced mostly amides, but only few other compounds, the other Alphaproteobacteria emitted more components.…”

Section: Comparative Analysismentioning

confidence: 99%

Volatiles of the Apicomplexan Alga Chromera velia and Associated Bacteria

et al. 2022

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Volatiles released by the apicomplexan alga Chromera velia CCAP1602/1 and their associated bacteria have been investigated. A metagenome analysis allowed the identification of the most abundant heterotrophic bacteria of the phycosphere, but the isolation of additional strains showed that metagenomics underestimated the complexity of the algal microbiome, However, a culture-independent approach revealed the presence of a planctomycete that likely represents a novel bacterial family. We analysed algal and bacterial volatiles by opensystem-stripping analysis (OSSA) on Tenax TA desorption tubes, followed by thermodesorption, cryofocusing and GC-MS-analysis. The analyses of the alga and the abundant bacterial strains Sphingopyxis litoris A01A-101, Algihabitans albus A01A-324, "Coraliitalea coralii" A01A-333 and Litoreibacter sp. A01A-347 revealed sulfur-and nitrogen-containing compounds, ketones, alcohols, aldehydes, aromatic compounds, amides and one lactone, as well as the typical algal products, apocarotenoids. The compounds were identified by gas chromatographic retention indices, comparison of mass spectra and syntheses of reference compounds. A major algal metabolite was 3,4,4trimethylcyclopent-2-en-1-one, an apocarotenoid indicating the presence of carotenoids related to capsanthin, not reported from algae so far. A low overlap in volatiles bouquets between C. velia and the bacteria was found, and the xenic algal culture almost exclusively released algal components.

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Chemical Ecology of Bacterial Volatiles

Cited by 7 publications

References 228 publications

Identification of Volatiles of the Dinoflagellate Prorocentrum cordatum

Identification of Volatiles of the Dinoflagellate Prorocentrum cordatum

Large volume headspace GC/MS analysis for the identification of volatile compounds relating to seafood decomposition

Volatiles of the Apicomplexan Alga Chromera velia and Associated Bacteria

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