An overview of anoxygenic phototrophic bacteria and their applications in environmental biotechnology for sustainable Resource recovery

George, Drishya M.; Vincent, Annette S.; Mackey, Hamish R.

doi:10.1016/j.btre.2020.e00563

Cited by 84 publications

(45 citation statements)

References 242 publications

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“…Likewise, these models can also be implemented in crop plants by exploiting conventional molecular biology tools as well as new genomeediting techniques. Besides crop plants, all our results are readily transferable to the highly conserved photorespiratory and photosynthetic cycles found in algae (Alami et al, 2021;Matula and Nabity, 2021), and blue-green algae (George et al, 2020). As algae and fast-growing land plants such as bamboo grass (Devi and Singh, 2021) are fast CO 2 harvesters even without engineering, they are often aimed for potential CO 2 -sequestration applications.…”

Section: Conclusion and Future Prospectsmentioning

confidence: 56%

Topological Analysis of the Carbon-Concentrating CETCH Cycle and a Photorespiratory Bypass Reveals Boosted CO2-Sequestration by Plants

Osmanoğlu

AlSeiari

AlKhoori

et al. 2021

Front. Bioeng. Biotechnol.

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Synthetically designed alternative photorespiratory pathways increase the biomass of tobacco and rice plants. Likewise, some in planta–tested synthetic carbon-concentrating cycles (CCCs) hold promise to increase plant biomass while diminishing atmospheric carbon dioxide burden. Taking these individual contributions into account, we hypothesize that the integration of bypasses and CCCs will further increase plant productivity. To test this in silico, we reconstructed a metabolic model by integrating photorespiration and photosynthesis with the synthetically designed alternative pathway 3 (AP3) enzymes and transporters. We calculated fluxes of the native plant system and those of AP3 combined with the inhibition of the glycolate/glycerate transporter by using the YANAsquare package. The activity values corresponding to each enzyme in photosynthesis, photorespiration, and for synthetically designed alternative pathways were estimated. Next, we modeled the effect of the crotonyl-CoA/ethylmalonyl-CoA/hydroxybutyryl-CoA cycle (CETCH), which is a set of natural and synthetically designed enzymes that fix CO₂ manifold more than the native Calvin–Benson–Bassham (CBB) cycle. We compared estimated fluxes across various pathways in the native model and under an introduced CETCH cycle. Moreover, we combined CETCH and AP3-w/plgg1RNAi, and calculated the fluxes. We anticipate higher carbon dioxide–harvesting potential in plants with an AP3 bypass and CETCH–AP3 combination. We discuss the in vivo implementation of these strategies for the improvement of C3 plants and in natural high carbon harvesters.

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Section: Conclusion and Future Prospectsmentioning

confidence: 56%

Topological Analysis of the Carbon-Concentrating CETCH Cycle and a Photorespiratory Bypass Reveals Boosted CO2-Sequestration by Plants

Osmanoğlu

AlSeiari

AlKhoori

et al. 2021

Front. Bioeng. Biotechnol.

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“…We evidenced that the investigated bottom sediments from Cardinal Pond were characterized by the highest relative abundance of bacteria capable of using CoQ10 pathways. George, et al [ 49 ] indicated that most Gram-negative facultative anaerobes use CoQ10 pathways, and these pathways can be identified in some anoxygenic phototrophic bacteria (isolated from lake sediment). Additionally, the presence of Gram-negative facultative anaerobes may correlate with temporary flooding and drying of the pond [ 49 ].…”

Section: Discussionmentioning

confidence: 99%

“…George, et al [ 49 ] indicated that most Gram-negative facultative anaerobes use CoQ10 pathways, and these pathways can be identified in some anoxygenic phototrophic bacteria (isolated from lake sediment). Additionally, the presence of Gram-negative facultative anaerobes may correlate with temporary flooding and drying of the pond [ 49 ].…”

Section: Discussionmentioning

confidence: 99%

Functional and Seasonal Changes in the Structure of Microbiome Inhabiting Bottom Sediments of a Pond Intended for Ecological King Carp Farming

Wolińska

Kruczyńska

Grządziel

et al. 2022

Biology

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The main goal of the study was to determine changes in the bacterial structure in bottom sediments occurring over the seasons of the year and to estimate microbial metabolic activity. Bottom sediments were collected four times in the year (spring, summer, autumn, and winter) from 10 different measurement points in Cardinal Pond (Ślesin, NW Poland). The Next-Generation Sequencing (MiSeq Illumina) and Community-Level Physiological Profiling techniques were used for identification of the bacterial diversity structure and bacterial metabolic and functional activities over the four seasons. It was evident that Proteobacteria, Acidobacteria, and Bacteroidetes were the dominant phyla, while representatives of Betaproteobacteria, Gammaproteobacteria, and Deltaproteobacteria predominated at the class level in the bottom sediments. An impact of the season on biodiversity and metabolic activity was revealed with the emphasis that the environmental conditions in summer modified the studied parameters most strongly. Carboxylic and acetic acids and carbohydrates were metabolized most frequently, whereas aerobic respiration I with the use of cytochrome C was the main pathway used by the microbiome of the studied bottom sediments.

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“…Among the bacteria, photosynthetic bacteria can synthesize various red, pink, or yellow‐orange carotenoids with unique structure (George et al, 2020). There are many successful examples of photosynthetic bacteria used for carotenoids production.…”

Section: Introductionmentioning

confidence: 99%

The stability of carotenoids from a marine photosynthetic bacterium Ectothiorhodospira shaposhnikovii P2

Liu

Xiao

Xie

et al. 2022

Food Processing Preservation

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Carotenoids are increasingly used in food and medical industry. However, the instability of carotenoids restricted its application. The stability of carotenoids extracts from a marine photosynthetic bacterium, Ectothiorhodospira shaposhnikovii P2, was studied under different storage conditions including light and dark, temperature (4–60°C), pH range (4.0–10.0), and three metallic solutions (Na+, Mg2+, & Fe3+). The results showed that carotenoids were suitable to store at dark, low temperature, and neutral‐to‐alkali conditions. At the presence of metals, including Na+, Mg2+, and Fe3+, carotenoids decreased differently. Especially, Fe3+ could seriously decrease the carotenoids concentration. The research could provide a reference for storage of natural pigments, especially carotenoids from photosynthetic bacteria. Novelty impact statement The stability of carotenoids extracts from a marine photosynthetic bacterium, Ectothiorhodospira shaposhnikovii P2, was studied under different storage conditions. The present research work showed that carotenoids from marine photosynthetic bacterium P2 were suitable for storage in dark, low temperature, neutral‐to‐alkaline medium. In the presence of metallic solutions, including Na+, Mg2+, and Fe3+, carotenoids decreased differently.

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An overview of anoxygenic phototrophic bacteria and their applications in environmental biotechnology for sustainable Resource recovery

Cited by 84 publications

References 242 publications

Topological Analysis of the Carbon-Concentrating CETCH Cycle and a Photorespiratory Bypass Reveals Boosted CO2-Sequestration by Plants

Topological Analysis of the Carbon-Concentrating CETCH Cycle and a Photorespiratory Bypass Reveals Boosted CO2-Sequestration by Plants

Functional and Seasonal Changes in the Structure of Microbiome Inhabiting Bottom Sediments of a Pond Intended for Ecological King Carp Farming

The stability of carotenoids from a marine photosynthetic bacterium Ectothiorhodospira shaposhnikovii P2

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