Changes in the bacterial community and extracellular compounds associated with the disaggregation of Microcystis colonies

Wang, Wenjing; Zhang, Yulei; Shen, Hong; Xie, Ping; Yu, Jianpeng

doi:10.1016/j.bse.2015.04.016

Cited by 27 publications

(14 citation statements)

References 17 publications

(17 reference statements)

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“…Simpson index was in the order of HD > HI, MD > MI, LD > LI ( Table 4 ). This finding was consistent with the detection results in the previous studies of the decomposition of cyanobacterial blooms [ 33 , 44 , 49 , 50 ]. It was interesting to found that high accumulated cyanobacterial density markedly reduced bacterial diversity in the dark.…”

Section: Resultssupporting

confidence: 93%

Dark accelerates dissolved inorganic phosphorus release of high-density cyanobacteria

et al. 2020

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Bloom-forming cyanobacteria dramatically influence nutrient cycling in eutrophic freshwater lakes. The phosphorus (P) assimilation and release of bloom-forming cyanobacteria significantly may also affect the phosphorus source and amounts in water. To understand the phosphorus release process of bloom-forming cyanobacteria below the accumulated surface and sedimentary bloom-forming cyanobacteria, the degradation of bloom-forming cyanobacteria dominated by Microcystis spp. at different cell density in the dark was investigated over a 25-day microcosm experiment. The dissolved inorganic phosphorus (DIP) and dissolved total phosphorus (DTP) contents increased with the increment of cyanobacterial density, and the dark status markedly increased the proportion of DIP in water during the decline period of bloom-forming cyanobacteria. Meanwhile, the process of cyanobacterial apoptosis accompanied by the changes of malondialdehyde (MDA) and phosphatase (AKP) contents, and the increases of superoxide dismutase (SOD) and catalase (CAT) activities of cyanobacteria in the dark, especially in low-density groups (5.23×108 cells L-1), which further affect the physicochemical water parameters. Moreover, the DIP release from high-density cyanobacteria (7.86×107 cells L-1~5.23×108 cells L-1) resulted from the relative abundance of organophosphorus degrading bacteria in the dark. Therefore, the fast decay of cyanobacteria in the dark could accelerate DIP release, the high DIP release amount from accumulated bloom-cyanobacteria provide adequate P quickly for the sustained growth of cyanobacteria.

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Section: Resultssupporting

confidence: 93%

Dark accelerates dissolved inorganic phosphorus release of high-density cyanobacteria

et al. 2020

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“…The other substances, 3,5-dimethoxybenzoic acid and 3-methoxyphenylacetic acid, were weak growth promotors; however, there are no data on the effect of these substances as inductors of cyanobacteria growth or their role in the formation of blooms. In the same way, some phenols, such as those that originate from the decomposition of organic matter, have also shown an effect on the development of cyanobacterial blooms [11,19].…”

Section: Discussionmentioning

confidence: 93%

Effect of Phenyl-Acyl Compounds on the Growth, Morphology, and Toxin Production of Microcystis aeruginosa Kützing

Herrera

Flórez

Velásquez

et al. 2019

Water

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The proliferation of cyanobacteria and, consequently, the production of cyanotoxins is a serious public health concern; for their control, several alternatives have been proposed, including physical, chemical, and biological methods. In the search for new alternatives and a greater understanding of the biochemical process involved in the blooms’ formation, we report here the effect of eight phenyl-acyl compounds in the growth of Microcystis aeruginosa Kützing (assesed as cell density/count and Chl a fluorescence concentration) morphology, and production of the toxin microcystin-LR (MC-LR). Caffeic acid and eugenol decreased the growth of M. aeruginosa Kützing and the levels of Chl a. However, 3,5-dimethoxybenzoic acid and syringic acid caused the opposite effect in the growth; 2′and 4′only affected the Chl a. A reduction in the concentration of the MC-LR toxin was detected after treatment with syringic acid, caffeic acid, and eugenol. According to HPLC/MS (High Performance Liquid Chromatography coupled to Mass Spectrometry), a redox process possibly occurs between caffeic acid and MC-LR. The optical microscopy and Scanning Electron Microscopy analyses revealed morphological changes that had been exposed to caffeic acid and vanillin, specifically in the cell division and presence of mucilage. Finally, assays in Daphnia pulex De Geer neonates indicated that caffeic acid had a non-toxic effect at concentrations as high as 100 mg/L at 48 h.

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“…Interactions such as nutrient transference (Yuan, Zhu, Xiao, & Yang, ), growth promotion or inhibition (Berg et al., ; Shi, Cai, Li, et al., ; Xie et al., ), and toxin production and degradation between bacteria and cyanobacteria are intense in these colonies (Maruyama et al., ). Furthermore, these bacteria are closely associated with cyanobacterial bloom formation and nutrient cycling, which greatly affect the development and decline of cyanobacterial blooms (Rashidan & Bird, ; Wang, Zhang, Shen, Xie, & Yu, ; Wang et al., ).…”

Section: Introductionmentioning

confidence: 99%

Large buoyant particles dominated by cyanobacterial colonies harbor distinct bacterial communities from small suspended particles and free‐living bacteria in the water column

et al. 2018

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Worldwide cyanobacterial blooms greatly impair ecosystems in many eutrophic lakes and impact the microbial environment. In particular, large cyanobacterial colonies that are buoyant on the water surface may provide a distinct habitat for bacteria from other small particles that are suspended stably in the water column. To test this hypothesis, bacterial communities (excluding cyanobacteria) attached to large particles dominated by cyanobacterial colonies (>120 μm, LA), small particles (3-36 μm, SA), and free-living bacteria (0.2-3 μm, FL) were investigated monthly for a year in Lake Taihu, China. Results confirmed that the Shannon diversity index of LA was significantly lower than that of FL, which was lower than that of SA. Cytophagia and Alphaproteobacteria were specially enriched in LA. Although samples in each habitat collected during high- (May to November) and low-bloom seasons (December to April) were separated, all samples in LA were clustered and separated from SA and FL, which were also clustered during the same sampling seasons. In addition, the bacterial communities in LA were correlated with nitrate level, whereas FL and SA were correlated with nitrate level and temperature. Mantel analysis revealed that bacterial composition significantly correlated with the cyanobacterial composition in LA and FL but not in SA. These results indicate that LA provides distinct niches to bacteria, whereas the differentiation of bacterial communities in FL and SA is seasonally dependent.

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Changes in the bacterial community and extracellular compounds associated with the disaggregation of Microcystis colonies

Cited by 27 publications

References 17 publications

Dark accelerates dissolved inorganic phosphorus release of high-density cyanobacteria

Dark accelerates dissolved inorganic phosphorus release of high-density cyanobacteria

Effect of Phenyl-Acyl Compounds on the Growth, Morphology, and Toxin Production of Microcystis aeruginosa Kützing

Large buoyant particles dominated by cyanobacterial colonies harbor distinct bacterial communities from small suspended particles and free‐living bacteria in the water column

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