Lysis of cyanobacteria with volatile organic compounds

Ozaki, Keiko; Ohta, Akemi; Iwata, Chieko; Horikawa, Aki; Tsuji, Kiyomi; Ito, Emiko; Ikai, Yoshitomo; Harada, Kenichi

doi:10.1016/j.chemosphere.2007.11.052

Cited by 89 publications

(67 citation statements)

References 23 publications

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“…The highest concentrations of β-cyclocitral, observed in the anoxic decay phase of the cyanobacterial blooms, may be due to large amounts of β-cyclocitral generated by cell damage or death of cyanobacteria (Watson et al, 2008). Previous reports indicated that β-cyclocitral induces the decomposition of cyanobacterial blooms (Ozaki et al, 2008), thereby enhancing DMS and DMTS release from decomposed cyanobacterial blooms. Therefore, strong correlation was found in the relationships between DMS, DMTS, and β-cyclocitral when dense cyanobacterial blooms decayed.…”

Section: Discussionmentioning

confidence: 99%

Off-flavor compounds from decaying cyanobacterial blooms of Lake Taihu

Niu

Xie

et al. 2013

Journal of Environmental Sciences

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Section: Discussionmentioning

confidence: 99%

Off-flavor compounds from decaying cyanobacterial blooms of Lake Taihu

Niu

Xie

et al. 2013

Journal of Environmental Sciences

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“…Possible mechanisms may include various types of interactions from nutrient cycling to the production of growth-inhibiting and cell-lysing compounds (Paerl, 1996;Rashidan and Bird, 2001;Sigee, 2005;Ozaki et al, 2008). The majority of the tested strains enhanced cyanobacterial growth.…”

Section: Discussionmentioning

confidence: 99%

High diversity of cultivable heterotrophic bacteria in association with cyanobacterial water blooms

et al. 2008

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Cyanobacterial mass occurrences (water blooms) cause ecological, economic and health problems worldwide. Still, little is known about heterotrophic bacteria associated with cyanobacteria and the interactions between those organisms. We isolated 460 bacterial strains from more than 40 lakes and rivers (151 samples), Baltic Sea (32 samples) and treated drinking water of seven treatment plants (29 samples). The water bodies and the raw water of the treatment plants were frequently dominated by high numbers of cyanobacteria. Various growth media were used to isolate the strains. Analysis of partial 16S rRNA gene fragments (701-905 bp for 358 strains and 413-497 bp for 102 strains) classified the isolated bacteria as Proteobacteria, Bacteroidetes, Actinobacteria, Firmicutes and Deinococcus-Thermus. Some of these isolates represented possible new bacterial orders, families, genera or species. We isolated various potentially pathogenic bacteria, such as Aeromonas, Vibrio, Acinetobacter and Pseudomonas, that may cause adverse health effects in humans and animals and should be taken into consideration when assessing the risks caused by cyanobacterial blooms. Several strains also inhibited or enhanced the growth of cyanobacteria. Most of such strains had an enhancing effect on the cyanobacterial growth. Other isolates were affiliated with genera such as Sphingomonas or Flavobacterium, which include strains that are capable of degrading cyanobacterial toxins or other recalcitrant and problematic organic compounds. The isolated strains provide a large group of bacteria that could be used in assessing and controlling the harmful effects of cyanobacteria.

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“…These studies include the following: (i) competition or exchange of nutrients (Steppe et al, 1996;Fuks et al, 2005;Jiang et al, 2007), (ii) lysis of Microcystis cells directly or indirectly (Manage, Kawabata & Nakano, 2001;Ozaki et al, 2008) and (iii) degradation of microcystin (Maruyama et al, 2003;Lemes et al, 2008). In natural freshwaters, the relationship between Microcystis and bacteria is probably as complex as any other kind of interaction.…”

Section: Introductionmentioning

confidence: 99%

Morphological and physiological changes in Microcystis aeruginosa as a result of interactions with heterotrophic bacteria

et al. 2011

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SUMMARY1. To reveal the role of aquatic heterotrophic bacteria in the process of development of Microcystis blooms in natural waters, we cocultured unicellular Microcystis aeruginosa with a natural Microcystis-associated heterotrophic bacterial community. 2. Unicellular M. aeruginosa at different initial cell densities aggregated into colonies in the presence of heterotrophic bacteria, while axenic Microcystis continued to grow as single cells. The specific growth rate, the chl a content, the maximum electron transport rate (ETR max ) and the synthesis and secretion of extracellular polysaccharide (EPS) were higher in non-axenic M. aeruginosa than in axenic M. aeruginosa after cell aggregation, whereas axenic and non-axenic M. aeruginosa displayed the same physiological characteristic before aggregation. 3. Heterotrophic bacterial community composition was analysed by PCR-denaturing gradient gel electrophoresis (PCR-DGGE) fingerprinting. The biomass of heterotrophic bacteria strongly increased in the coinoculated cultures, but the DGGE banding patterns in coinoculated cultures were distinctly dissimilar to those in control cultures with only heterotrophic bacteria. Sequencing of DGGE bands suggested that Porphyrobacter, Flavobacteriaceae and one uncultured bacterium could be specialist bacteria responsible for the aggregation of M. aeruginosa. 4. The production of EPS in non-axenic M. aeruginosa created microenvironments that probably served to link both cyanobacterial cells and their associated bacterial cells into mutually beneficial colonies. Microcystis colony formation facilitates the maintenance of high biomass for a long time, and the growth of heterotrophic bacteria was enhanced by EPS secretion from M. aeruginosa. 5. The results from our study suggest that natural heterotrophic bacterial communities have a role in the development of Microcystis blooms in natural waters. The mechanisms behind the changes of the bacterial community and interaction between cyanobacteria and heterotrophic bacteria need further investigations.

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Lysis of cyanobacteria with volatile organic compounds

Cited by 89 publications

References 23 publications

Off-flavor compounds from decaying cyanobacterial blooms of Lake Taihu

Off-flavor compounds from decaying cyanobacterial blooms of Lake Taihu

High diversity of cultivable heterotrophic bacteria in association with cyanobacterial water blooms

Morphological and physiological changes in Microcystis aeruginosa as a result of interactions with heterotrophic bacteria

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