Algicidal effects and denitrification activities of Acinetobacter sp. J25 against Microcystis aeruginosa

Su, Jun feng; Shao, Si cheng; Huang, Ting; Ma, Fang; Jin, Lu; Zhang, Kai

doi:10.1016/j.jece.2016.01.003

Cited by 12 publications

(9 citation statements)

References 24 publications

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“…Full illumination was positively correlated with the algicidal effect of Acinetobacter sp. J25 against M. aeruginosa . The optimum algicidal effect of strain TL against M. aeruginosa was under the light and dark cycle .…”

Section: Discussionmentioning

confidence: 99%

“…Photosynthesis is a crucial cellular process determining the growth of algae. Algicidal substances can affect oxygen production, protein synthesis, and electron transfer of the algal photosynthesis system, whereas some other bacteria seem not to attack this system and showed higher activity under a completely dark condition than under the light/darkness cycle and full‐light conditions . In addition, illumination also generates a large number of reactive oxygen species (ROS) that should be quickly erased by the antioxidant .…”

Section: Discussionmentioning

confidence: 99%

“…Presently, many techniques have been used to reduce algal biomass during blooms, such as chemical algicidal agents—copper sulfate , clay , and UV irradiation . However, those chemical or physical methods either required high cost or posed potential risks to the aquatic environment and human safety .…”

Section: Introductionmentioning

confidence: 99%

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Algicidal characterization and mechanism of Bacillus licheniformis Sp34 against Microcystis aeruginosa in Dianchi Lake

et al. 2019

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Microcystis aeruginosa blooms are a worldwide serious environmental problem and bloom control with bacteria is promising. In this study, a Bacillus licheniformis strain Sp34 with potent algicidal and inhibitory effects on the microcystins synthesis against fast‐growing M. aeruginosa was isolated from Dianchi Lake. Sp34 killed the bloom‐causing algal strain M. aeruginosa DCM4 of Dianchi Lake with an initial Chlorophyll‐a concentration of 2.0 mg/L at a cell density of no less than 1.35 × 105 CFU/ml. It can also efficiently kill some other harmful algal species, such as M. wesenbergii and Phormidium sp. The algicidal activity of Sp34 relied on the release of algicidal substances, which had good heat (−20°C to 121°C) and acid–base (pH 3–11) resistance. In addition, the high algicidal activity depended on the good growth of algae indicated by the significantly positive correlations between algal growth and algicidal ratio (p < .001). The algicidal effect of Sp34 involved causing oxidative stress, lipid peroxidation, and morphological injury of algal cells, along with DNA damage and dysfunction of DNA‐repair function, weakening the photosynthesis system, and inhibiting microcystin synthesis. In general, Sp34 can kill fast‐growing M. aeruginosa and inhibit algal microcystin synthesis efficiently, so, it is a promising biocontrol agent to mitigate cyanobacterial blooms.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Algicidal characterization and mechanism of Bacillus licheniformis Sp34 against Microcystis aeruginosa in Dianchi Lake

et al. 2019

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“…Application of bacteria that are capable of degrading or inhibiting algae growth is considered to be a key biological strategy toward controlling the potentially devastating effects of cyano-HABs. − To date, a number of algicidal bacteria had been isolated, and their characteristics for controlling cyano-HABs were well investigated. A recent study by Su et al (2016) obtained Acinetobacter sp J25 with a high algicidal activity from an eutrophic Qu Jiang Lake .…”

Section: Discussionmentioning

confidence: 99%

Simultaneous Microcystis Algicidal and Microcystin Degrading Capability by a Single Acinetobacter Bacterial Strain

Kang

et al. 2016

Environ. Sci. Technol.

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Measures for removal of toxic harmful algal blooms often cause lysis of algal cells and release of microcystins (MCs). In this study, Acinetobacter sp. CMDB-2 that exhibits distinct algal lysing activity and MCs degradation capability was isolated. The physiological response and morphological characteristics of toxin-producing Microcystis aeruginosa, the dynamics of intra- and extracellular MC-LR concentration were studied in an algal/bacterial cocultured system. The results demonstrated that Acinetobacter sp. CMDB-2 caused thorough decomposition of algal cells and impairment of photosynthesis within 24 h. Enhanced algal lysis and MC-LR release appeared with increasing bacterial density from 1 × 10 to 1 × 10 cells/mL; however, the MC-LR was reduced by nearly 94% within 14 h irrespective of bacterial density. Measurement of extracellular and intracellular MC-LR revealed that the toxin was decreased by 92% in bacterial cell incubated systems relative to control and bacterial cell-free filtrate systems. The results confirmed that the bacterial metabolite caused 92% lysis of Microcystis aeruginosa cells, whereas the bacterial cells were responsible for approximately 91% reduction of MC-LR. The joint efforts of the bacterium and its metabolite accomplished the sustainable removal of algae and MC-LR. This is the first report of a single bacterial strain that achieves these dual actions.

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“…The indirect attack mode has been observed in the numerous metabolites from most of the reported anticyanobacterial microorganisms, and the anticyanobacterial characteristics of these bacteria seem to be unique to M. aeruginosa. Up to now, the genus Acinetobacter [22,72,119] and Exiguobacterium [44,45,96], which firstly attach to M. aeruginosa and then cause serious damage to the cyanobacterial cell structure and morphology, are recognized as degrading M. aeruginosa by producing anticyanobacterial substances. Nevertheless, some anticyanobacteria can inhibit or kill green alga and cyanobacteria with an indirect attack simultaneously.…”

Section: Anticyanobacterial Modesmentioning

confidence: 99%

Recent Advances in the Research on the Anticyanobacterial Effects and Biodegradation Mechanisms of Microcystis aeruginosa with Microorganisms

et al. 2022

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Harmful algal blooms (HABs) have attracted great attention around the world due to the numerous negative effects such as algal organic matters and cyanobacterial toxins in drinking water treatments. As an economic and environmentally friendly technology, microorganisms have been widely used for pollution control and remediation, especially in the inhibition/biodegradation of the toxic cyanobacterium Microcystis aeruginosa in eutrophic water; moreover, some certain anticyanobacterial microorganisms can degrade microcystins at the same time. Therefore, this review aims to provide information regarding the current status of M. aeruginosa inhibition/biodegradation microorganisms and the acute toxicities of anticyanobacterial substances secreted by microorganisms. Based on the available literature, the anticyanobacterial modes and mechanisms, as well as the in situ application of anticyanobacterial microorganisms are elucidated in this review. This review aims to enhance understanding the anticyanobacterial microorganisms and provides a rational approach towards the future applications.

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Algicidal effects and denitrification activities of Acinetobacter sp. J25 against Microcystis aeruginosa

Cited by 12 publications

References 24 publications

Algicidal characterization and mechanism of Bacillus licheniformis Sp34 against Microcystis aeruginosa in Dianchi Lake

Algicidal characterization and mechanism of Bacillus licheniformis Sp34 against Microcystis aeruginosa in Dianchi Lake

Simultaneous Microcystis Algicidal and Microcystin Degrading Capability by a Single Acinetobacter Bacterial Strain

Recent Advances in the Research on the Anticyanobacterial Effects and Biodegradation Mechanisms of Microcystis aeruginosa with Microorganisms

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