The shift of mutualistic relationships among algae, free-living and attached bacteria through different nutrient addition mode: a mesocosm study

Cao, Xiuyun; Li, Hui; Zhou, Yiyong; Song, Changchun

doi:10.1080/02705060.2020.1858984

Cited by 11 publications

(4 citation statements)

References 37 publications

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“…Compared with those in the PBO system, in the PBC system, the assimilation of C. pyrenoidosa led to a decrease in the concentrations of NO − 3 ─N and TP. The concentrations of TAN and NO − 2 ─N in the PBC system peaked on Day 27, and the reason for the postpeak decline was that the nitrifying microorganisms in the systems were less affected by C. pyrenoidosa, including the microbial community adapting to its influence or the weakening of nutrient competition [27]. In contrast to the PB systems, in the WE systems, the supplementation of C. pyrenoidosa had no effect on the water quality parameters.…”

Section: Discussionmentioning

confidence: 92%

Effects of Chlorella pyrenoidosa Supplementation on Water Quality, Shrimp Growth Performance, and Biofilm Bacterial Community Structure in Litopenaeus vannamei Aquaculture Systems

Liu,

Xu,

Liu

et al. 2023

Aquaculture Research

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Chlorella pyrenoidosa is a widely used microalgae in the aquaculture process of Litopenaeus vannamei. In order to evaluate the effects of supplementing C. pyrenoidosa on water quality, shrimp growth performance, and biofilm bacterial community structure in L. vannamei aquaculture systems, C. pyrenoidosa suspension was supplemented in the precultured biofilm (PB) and water exchange (WE) culture systems. The results showed that supplementation with C. pyrenoidosa significantly increased the turbidity and the concentrations of total ammonia nitrogen (TAN) and nitrite nitrogen ( NO 2 − ─N) in the PBC system (the PB system supplemented with C. pyrenoidosa), but had no significant effect on those in the WEC system (the WE system supplemented with C. pyrenoidosa). However, the TAN concentration of all systems remained at a low level (<0.1 mg/L) throughout the experiment. Additionally, supplementation with C. pyrenoidosa decreased the final concentrations of total phosphorus in the PBC and WEC systems by 15.74% and 23.33%, respectively. With the supplementation of C. pyrenoidosa, the final weight, final biomass, and average daily growth rate of L. vannamei increased, while the feed conversion ratio decreased. 16srRNA high-throughput sequencing results showed that the supplementation of C. pyrenoidosa to the PBC system resulted in a decrease in the relative abundances of Proteobacteria and Bacteroidetes and an increase in the relative abundance of Acidobacteria. Compared to those in the initial biofilm sample, the relative abundances of nitrifying bacteria, Nitrosococcus, Nitrosomonas, Nitrococcus, and Nitrospira, in PBCF (biofilm in the PB systems with C. pyrenoidosa) and PBOF (biofilm in the PB systems without C. pyrenoidosa) decreased from 10.18% to 3.05% and 0.75%, respectively. In conclusion, C. pyrenoidosa, as a supplement to the aquaculture systems, has practical application prospects.

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Section: Discussionmentioning

confidence: 92%

Effects of Chlorella pyrenoidosa Supplementation on Water Quality, Shrimp Growth Performance, and Biofilm Bacterial Community Structure in Litopenaeus vannamei Aquaculture Systems

Liu,

Xu,

Liu

et al. 2023

Aquaculture Research

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“…Microscale interactions between heterotrophic bacteria and phytoplankton underpin ocean biogeochemistry. However, these interactions between the phytoplankton and heterotrophic bacteria are not stable and can be disturbed or even disrupted by external nutrient supply ( 14 ). In this study, we show that despite disturbances from environmental factors (inorganic nutrients), Synechococcus and heterotrophic bacteria can form recurrent mutualistic interactions that could drive the survival of Synechococcus in nutrient-depleted conditions.…”

Section: Discussionmentioning

confidence: 99%

Inherent tendency of Synechococcus and heterotrophic bacteria for mutualism on long-term coexistence despite environmental interference

Nair

Zhao

et al. 2022

Sci. Adv.

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Mutualism between Synechococcus and heterotrophic bacteria has been found to support their prolonged survival in nutrient-depleted conditions. However, environmental interference on the fate of their mutualism is not understood. Here, we show that exogenous nutrients disrupt their established mutualism. Once the exogenous nutrients were exhausted, Synechococcus and heterotrophic bacteria gradually reestablished their metabolic mutualism during 450 days of culture, which revived unhealthy Synechococcus cells. Using metagenomics, metatranscriptomics, and the 15 N tracer method, we reveal that the associated bacterial nitrogen fixation triggered the reestablishment of the mutualism and revival of Synechococcus health. During this process, bacterial community structure and functions underwent tremendous adjustments to achieve the driving effect, and a cogeneration of nitrogen, phosphorus, iron, and vitamin by the heterotrophic bacteria sustained Synechococcus ’s prolonged healthy growth. Our findings suggest that Synechococcus and heterotrophic bacteria may have an inherent tendency toward mutualism despite environmental interference. This may exhibit their coevolutionary adaptations in nutrient-deficient environments.

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“…Before co-cultivation (0 d of co-cultivation), cyanobacterial cells exhibited a spherical shape with a smooth surface; however, after 4 d of co-cultivation, cyanobacterial cells shrunk, and the SEM images showed the adherence of bacterial cells to the cyanobacterial cell surface. After 7 d of cocultivation, the cyanobacterial surface became significantly rugose and the bacteria adhered to the cyanobacterial cells, which demonstrated direct contact algicidal activity [31,32].…”

Section: Algicidal Effects Of the Strainmentioning

confidence: 99%

Identifying Algicides of Enterobacter hormaechei F2 for Control of the Harmful Alga Microcystis aeruginosa

Zhang

Yang

Xie

et al. 2022

IJERPH

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Eutrophication has become an increasingly serious environmental issue and has contributed towards an explosion in harmful algal blooms (HABs) affecting local development. HABs can cause serious threats to ecosystems and human health. A newly isolated algicidal strain, Enterobacter hormaechei F2, showed high algicidal activity against the typical HAB species Microcystis aeruginosa. Potential algicides were detected through liquid chromatograph–mass spectrometer analysis, revealing that prodigiosin is an algicide and PQS is a quorum sensing molecule. RNA-seq was used to understand the algicidal mechanisms and the related pathways. We concluded that the metabolism of prodigiosin and PQS are active at the transcriptional level. The findings indicate that E. hormaechei F2 can be used as a potential biological agent to control harmful algal blooms to prevent the deterioration of the ecological and economic value of water bodies.

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The shift of mutualistic relationships among algae, free-living and attached bacteria through different nutrient addition mode: a mesocosm study

Cited by 11 publications

References 37 publications

Effects of Chlorella pyrenoidosa Supplementation on Water Quality, Shrimp Growth Performance, and Biofilm Bacterial Community Structure in Litopenaeus vannamei Aquaculture Systems

Effects of Chlorella pyrenoidosa Supplementation on Water Quality, Shrimp Growth Performance, and Biofilm Bacterial Community Structure in Litopenaeus vannamei Aquaculture Systems

Inherent tendency of Synechococcus and heterotrophic bacteria for mutualism on long-term coexistence despite environmental interference

Identifying Algicides of Enterobacter hormaechei F2 for Control of the Harmful Alga Microcystis aeruginosa

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