A New Antibiotic-Producing Bacterium from Seawater: Alteromonas aurantia sp. nov.

Gauthier, Michel; Breittmayer, Violette A.

doi:10.1099/00207713-29-4-366

Cited by 46 publications

(35 citation statements)

References 18 publications

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“…The function of the ANG is unknown but histological studies have shown that the gland exhibits a secretory cycle associated with maturation of the squid (Lum-Kong, 1992). Some members of the genus Alteromonas can produce antibiotic compounds (Gauthier, 1976;Gauthier & Breittmayer, 1979). Because the ANG is a reproductive organ and located immediately adjacent to the eggproducing nidamental glands, the antibiotic activities of Alteromonas-like species could provide protection for the cephalopod eggs once laid.…”

Section: Discussionmentioning

confidence: 99%

Shewanella pealeana sp. nov., a member of the microbial community associated with the accessory nidamental gland of the squid Loligo pealei

Leonardo

Moser

Barbieri

et al. 1999

International Journal of Systematic and Evolutionary Microbiology

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Section: Discussionmentioning

confidence: 99%

Shewanella pealeana sp. nov., a member of the microbial community associated with the accessory nidamental gland of the squid Loligo pealei

Leonardo

Moser

Barbieri

et al. 1999

International Journal of Systematic and Evolutionary Microbiology

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“…55b-11 were isolated from Japan which produced low molecular weight compounds inhibitory to the growth of Vibrio strains [11]. There are many reports about antibacterial activity shown by marine bacteria, namely, Pseudomonas, Yersinia, Brevibacterium, Bacillus, and Alteromonas [9,[12][13][14][15]. Recent studies however have targeted bacteria from an increasing assortment of nutrient rich and nutrient poor marine habitats including the surfaces or interior spaces of marine invertebrates in order to fully assess the potential of marine bacteria as a natural drug source.…”

Section: Introductionmentioning

confidence: 99%

Hemolysin, Protease, and EPS Producing PathogenicAeromonas hydrophilaStrain An4 Shows Antibacterial Activity against Marine Bacterial Fish Pathogens

Pandey

Naik

Dubey

2010

Journal of Marine Biology

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A pathogenic Aeromonas hydrophila strain An4 was isolated from marine catfish and characterized with reference to its proteolytic and hemolytic activity along with SDS-PAGE profile (sodium dodecyl sulphate-Polyacrylamide gel electrophoresis) of ECPs (extracellular proteins) showing hemolysin (approximately 50 kDa). Agar well diffusion assay using crude cell extract of the bacterial isolate clearly demonstrated antibacterial activity against indicator pathogenic bacteria, Staphylococcus arlettae strain An1, Acinetobacter sp. strain An2, Vibrio parahaemolyticus strain An3, and Alteromonas aurentia SE3 showing inhibitory zone >10 mm well comparable to common antibiotics. Further GC-MS analysis of crude cell extract revealed several metabolites, namely, phenolics, pyrrolo-pyrazines, pyrrolo-pyridine, and butylated hydroxytoluene (well-known antimicrobials). Characterization of EPS using FTIR indicated presence of several protein-related amine and amide groups along with peaks corresponding to carboxylic and phenyl rings which may be attributed to its virulent and antibacterial properties, respectively. Besides hemolysin, EPS, and protease, Aeromonas hydrophila strain An4 also produced several antibacterial metabolites.

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“…Several Alteromonas spp. (since reclassified as Pseudoalteromonas) produce high molecular mass antibacterial compounds (Gauthier & Flatau 1976, Gauthier & Breittmayer 1979, some of which can diffuse into the surrounding medium whereas others remain bound to the cell surface (Andersen et al 1974). Nair & Simidu (1987) documented the antibacterial properties of marine heterotrophic bacteria isolated from water samples, sediment, phytoplankton, zooplankton, and sponges, with the greatest activity accompanying phytoplankton isolates.…”

Section: Introductionmentioning

confidence: 99%

Influence of microbial interactions on the susceptibility of Karenia spp. to algicidal bacteria

Roth¹,

Mikulski²,

Doucette³

2008

Aquat. Microb. Ecol.

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A bacterial strain (D38BY) belonging to the family Flavobacteriaceae and antagonistic towards an algicidal bacterium (strain S03; Flavobacteriaceae) was isolated from a culture of the red tide dinoflagellate Karenia brevis that had previously been characterized as resistant to attack by strain S03. This antagonistic bacterium increased the survival time of otherwise susceptible, bacteriafree K. brevis cultures in a concentration-dependent manner during exposure to the algicidal bacterium. Experimental evidence indicated that direct contact was required in order for strain D38BY to inhibit the killing activity of algicidal strain S03. While further work is needed to determine its precise mode of action, the antagonistic properties of strain D38BY provide further evidence that the resistance or susceptibility of certain algal taxa to algicidal attack can be more a function of interactions within the ambient microbial community than an intrinsic property of the alga. KEY WORDS: Algicidal bacteria · Antagonism · CFB complex · Karenia brevis · Microbial interactions Resale or republication not permitted without written consent of the publisherAquat Microb Ecol 50: [251][252][253][254][255][256][257][258][259] 2008 Previous studies have shown that bacteria in contact with organic matter have a greater tendency to inhibit the growth of other bacteria (Nair & Simidu 1987, Burgess et al. 1999. Long & Azam (2001) reported that the number of bacterial strains inhibited by attached bacteria was approximately 3 times higher than those adversely affected by free-living bacteria. Grossart et al. (2004) found that over 50% of strains isolated from marine aggregates were capable of inhibiting at least 1 other bacterium. Although these studies highlight the contributions of attached bacteria, free-living microbes also warrant consideration. Mayali & Doucette (2002) showed that resistance and susceptibility to an algicidal bacterium could be transferred among cultures of the red tide dinoflagellate Karenia brevis simply by exchanging the native freeliving microbial communities associated with susceptible and resistant isolates. Their findings implicated interactions among bacteria as a potential mechanism for modulating the killing activity of algicidal strains. The ecological significance of antagonistic or inhibitory interactions between bacteria remains largely speculative. Nonetheless, such interactions could influence competition for nutrients or space (Holmström & Kjelleberg 1999) and lead to changes in microbial species composition that may, in turn, alter the nature and rates of bacterially-mediated carbon cycling (Martinez et al. 1996, Long et al. 2003. A better understanding of these relationships and knowledge of the key species involved are essential for predicting their impacts on marine ecosystems. Our goal was to isolate and characterize the antagonistic microbial component(s) of a Karenia brevis culture responsible for impeding the killing activity of an algicidal bacterium reported as lethal to other ...

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A New Antibiotic-Producing Bacterium from Seawater: Alteromonas aurantia sp. nov.

Cited by 46 publications

References 18 publications

Shewanella pealeana sp. nov., a member of the microbial community associated with the accessory nidamental gland of the squid Loligo pealei

Shewanella pealeana sp. nov., a member of the microbial community associated with the accessory nidamental gland of the squid Loligo pealei

Hemolysin, Protease, and EPS Producing PathogenicAeromonas hydrophilaStrain An4 Shows Antibacterial Activity against Marine Bacterial Fish Pathogens

Influence of microbial interactions on the susceptibility of Karenia spp. to algicidal bacteria

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