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

Kong, Yun; Wang, Yue; Miao, Lihong; Mo, Shuhong; Li, Jiake; Zheng, Xing

doi:10.3390/microorganisms10061136

Cited by 8 publications

(3 citation statements)

References 132 publications

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“…The microorganisms in the fish gut also spread into the water and soil with the fish excretion, while some strains of bacteria can colonize the water body and, thus, improve the water environment. Some studies have shown that the pesticides and fertilizers used in rice cultivation seriously harm the water environment, leaving large amounts of harmful substances in the ecosystem, as well as inducing eutrophication, which can be eliminated to some extent through microbial metabolism (Kong et al, 2022). On the other hand, some strains also settle into the soil, and these microorganisms undertake several important ecosystem functions including soil carbon and nitrogen cycling, helping to alleviate problems such as reduced soil fertility and soil consolidation caused by rice cultivation (Daniel et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Screening and fermentation medium optimization of a strain favorable to Rice–fish Coculture

Xia

Zou

et al. 2022

Front. Microbiol.

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Rice–fish coculture (RF) is a small ecosystem in which microorganisms are widely distributed in the fish, water environment, soil, and plants. In order to study the positive effects of microorganisms on common carp and rice in the RF ecosystem, a total of 18 strains with growth-promoting ability were screened from common carp (Cyprinus carpio) gut contents, among which three strains had the ability to produce both DDP-IV inhibitors and IAA. The strain with the strongest combined ability, FYN-22, was identified physiologically, biochemically, and by 16S rRNA, and it was initially identified as Bacillus licheniformis. As the number of metabolites secreted by the strain under natural conditions is not sufficient for production, the FYN-22 fermentation medium formulation was optimized by means of one-factor-at-a-time (OFAT) experiments and response surface methodology (RSM). The results showed that, under the conditions of a soluble starch concentration of 10.961 g/l, yeast concentration of 2.366 g/l, NH4Cl concentration of 1.881 g/l, and FeCl3 concentration of 0.850 g/l, the actual measured number of FYN-22 spores in the fermentation broth was 1.913 × 109 CFU/ml, which was 2.575-fold improvement over the pre-optimization value. The optimized fermentation solution was used for the immersion operation of rice seeds, and, after 14 days of incubation in hydroponic boxes, the FYN-22 strain was found to have a highly significant enhancement of 48.31% (p < 0.01) on the above-ground part of rice, and different degrees of effect on root length, fresh weight, and dry weight (16.73, 17.80, and 21.97%, respectively; p < 0.05). This study may provide new insights into the fermentation process of Bacillus licheniformis FYN-22 and its further utilization in RF systems.

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Section: Discussionmentioning

confidence: 99%

Screening and fermentation medium optimization of a strain favorable to Rice–fish Coculture

Xia

Zou

et al. 2022

Front. Microbiol.

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“…Many Bacteriodetes such as Pedobacter sp. Aquimarina sp., Firmicutes including the Bacillus group, Exiguobacterium sp., and Staphylococcus are also highly efficient in inhibiting Microcystis growth 64 . In our studies, we observed a significant diversity of different Pedobacter sp.…”

Section: We Hypothesized That High Abundance Of Algicidal Bacteria Wo...mentioning

confidence: 99%

Dynamics of associated microbiomes during algal bloom development: to see and to be seeing

Meirkhanova,

Zhumakhanova,

Len

et al. 2023

Preprint

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Our understanding of the interactions between bacteria and phytoplankton in the freshwater phycosphere, including the development of algal blooms, is very limited. To identify the taxa and compositional variation within microbial communities, we performed 16S rRNA amplicon sequencing research on samples collected weekly through summer from mesocosms that differed in temperature and mixing regimes. We investigated, for the first time, the abundance diversity of microalgae, including Chlorophyta, Cryptophyta, and Cyanobacteria species, using visualization-based FlowCAM analysis and classification of microbial communities to species level by nanopore next-generation sequencing. We found that nanopore metagenomics, in parallel with complementary imaging flow cytometry, can depict the fine temporal dynamics of microbiomes associated with visually identified Microcystis morphospecies, Chlorophyta, and Cryptophyta during algal bloom development. Our results showed that the temporal characteristics of microbiomes combined with a visual approach may be a key tool to predict the metacommunity structure and dynamics of algal blooms in response to anthropogenic effects and climate change.

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“…Algicidal bacteria, as a biological control method, are expected to be environmentally friendly and feasible for bloom control [8]. The research about algicidal bacteria mostly focuses on cyanobacteria species specificity [9], their attacking mode [10], the relationship between their concentration threshold and cyanobacteria decay [11], definite cyanobactericidal substances [12] and their cyanobactericidal mechanism [13]. Most Microcystis strains tested in the laboratory are not in a colonial state [6].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Algicidal and Denitrifying Bacteria on the Vertical Distribution of Cyanobacteria and Nutrients

Zhou

Wang

Wen

et al. 2022

Water

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Algicidal bacteria combined with the ability of aerobic denitrification is considered to be a promising way to control harmful cyanobacterial bloom and remove nitrogen. However, the effect of these bacteria on the vertical distribution of colonial cyanobacteria and nutrients remained unknown. In this study, two algicidal and denitrifying bacteria were respectively co-cultured with the colonial Microcystis aeruginosa to construct the microcosm systems, and then the cyanobacteria number, the ratio of bacterial to cyanobacterial abundance, the content of dissolved nitrogen, phosphorus and organic carbon in different water layers were investigated. The results showed that the distribution difference of Microcystis among the vertical water layers was further enlarged due to the short-term influence of algicidal bacteria Brevundimonas diminuta and Pseudomonas stutzeri. The number of Microcystis in the lower layer was further reduced by the inhibitory effect of the algicidal bacteria. However, there was a dramatic increase in the number of Microcystis in the upper layer, even when the ratio of algicidal bacteria to cyanobacteria increased significantly. B. diminuta and P. stutzeri both greatly promoted the removal of dissolved total nitrogen in the upper and middle layers of cyanobacteria blooming water, but they also boosted the release of dissolved phosphorus in all layers. These results enable us to better understand the possible limitations of algicidal bacteria in their application to control cyanobacteria blooms.

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

Cited by 8 publications

References 132 publications

Screening and fermentation medium optimization of a strain favorable to Rice–fish Coculture

Screening and fermentation medium optimization of a strain favorable to Rice–fish Coculture

Dynamics of associated microbiomes during algal bloom development: to see and to be seeing

The Effect of Algicidal and Denitrifying Bacteria on the Vertical Distribution of Cyanobacteria and Nutrients

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