Mechanical regulation of photosynthesis in cyanobacteria

Moore, Kristin Anderson; Altus, Sabina; Tay, Jian Wei; Meehl, Janet B.; Johnson, Erik; Bortz, David M.; Cameron, Jeffrey C.

doi:10.1038/s41564-020-0684-2

Cited by 30 publications

(39 citation statements)

References 72 publications

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“…However, it is still unclear whether other soil C components linking inorganic or organic biogeochemical processes as potential determinants of SOC accumulation, e.g., SIC (primarily carbonate) account for soil C in approximately 70% of these regions. We assume that SIC not only provides C source to autotrophic microorganisms (e.g., cyanobacteria) (Moore et al, 2020), but also serves as a "reserving SOM source" via bio-transformation (Miltner et al, 2004). Significantly linear associations among microbial residues, SOC, and SIC indicate that SIC is a potential determinant of SOC components (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Most microbes use organic matter as energy for reproduction and growth, contributing to the SOC pool through microbial cell residues (Kögel-Knabner, 2017;Ni et al, 2020). However, certain microbes, e.g., photosynthetic bacteria, potentially use SIC (mainly carbonate) as C source to synthesize cell (Zamanian et al, 2016;Moore et al, 2020). 13 CO 2 incubation experiments have reported that soil autotrophic microorganisms can utilize inorganic C to synthesize microbial biomass (Perez and Matin, 1982;Miltner et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Microbial residues as indicator for inorganic carbon transition to organic carbon in coastal saline soils

Shao¹,

Li²,

Yang³

et al. 2020

Preprint

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Although autotrophic or chemotrophic microorganisms can assimilate CO2 or carbonate, it is still unclear how microorganisms convert soil inorganic carbon (SIC) to organic carbon (SOC), owing to the lack of a microbial indicator between SIC and SOC. Herein, we hypothesized that carbonate-rich saline soils are a potential source that contribute to the SOC pool through the transformation of microbial necromass. SIC levels linearly decreased with an increase in salinity, while SOC and microbial residues exponentially declined. A structural equation model verified the causality of SIC-microbial residues-SOC, suggesting that microbial residues can serve as an indicator of SIC transition to SOC. This study highlights the regulation of microbial necromass in SIC cycling, thus enhancing the application of SIC for C biogeochemical cycles and enriching organic C reservoirs in global saline or dry lands.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microbial residues as indicator for inorganic carbon transition to organic carbon in coastal saline soils

Shao¹,

Li²,

Yang³

et al. 2020

Preprint

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“…Most microbes use organic matter as energy for reproduction and growth, thus contributing to the SOC pool through microbial cell residues (Kögel-Knabner, 2017;Shao et al, 2021). However, certain microbes, e.g., autotrophic bacteria, use CO 2 or carbonate as the main or unique C source to synthesize microbial biomass, convert SIC to SOC via biotransformation, providing organic C source to soil organisms (Zamanian et al, 2016;Moore et al, 2020). For instance, 13 CO 2 incubation experiments have reported that soil autotrophic microorganisms can utilize inorganic C to synthesize microbial biomass (Perez and Matin, 1982;Miltner et al, 2004).…”

Section: H I G H L I G H T Smentioning

confidence: 99%

“…Along the natural salinity gradient, SIC was higher at low salinity ( < 6 ‰) and declined as salinity increased, suggesting that salinity stress influences SIC dynamic through the variation in soil alkalinity or biologically respired CO 2 (Xie et al, 2009;Chi et al, 2018;Wang et al, 2019). SIC has two potential determinants: (1) the uptake and deposition of atmospheric CO 2 by base cations (Raheb et al, 2017), and (2) the redistribution of respired CO 2 to microorganisms (Moore et al, 2020). The atmospheric CO 2 in regional scale is almost homogeneous, suggesting that the changed SIC should be determined by abiotic or biotic factors.…”

Section: Driving Factors Of Sic Shifts Spanning the Natural Salinity Gradientmentioning

confidence: 99%

“…2), linking inorganic or organic biogeochemical processes are potential determinants of SOC accumulation remain unclear. The SIC not only provides C source to autotrophic microorganisms (e.g., Cyanobacteria or Nitrosospira) (Moore et al, 2020;, but also serves as a "reserved SOM source" via bio-transformation (Miltner et al, 2004). Significant linear associations of SIC with SOC and microbial residues indicate that SIC might be a potential determinant of SOC components.…”

Section: Microbial Residues Transforming Sic To Soc In Carbonaterich Saline Landsmentioning

confidence: 99%

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Microbial residues as the nexus transforming inorganic carbon to organic carbon in coastal saline soils

Shao

Dong

et al. 2021

Soil Ecol. Lett.

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Soil inorganic carbon (SIC), including mainly carbonate, is a key component of terrestrial soil C pool. Autotrophic microorganisms can assimilate carbonate as the main or unique C source, how microorganisms convert SIC to soil organic carbon (SOC) remains unclear. A systematic field survey (n = 94) was performed to evaluate the shift in soil C components (i.e., SIC, SOC, and microbial residues) along a natural salinity gradient (ranging from 0.5 ‰ to 19 ‰), and further to explore how microbial necromass as an indicator converting SIC into SOC in the Yellow River delta. We observed that SIC levels linearly decreased with increasing salinity, ranging from~12 g kg -1 (salinity < 6 ‰) tõ 10 g kg -1 (salinity >6 ‰). Additionally, the concentrations of SOC and microbial residues exponentially decreased from salinity < 6 ‰ to salinity >6 ‰, with the decline of 39% and 70%, respectively. Microbial residues and SOC was tightly related to the variations in SIC. The structural equation model showed the causality on explanation of SOC variations with SIC through microbial residues, which can contribute 89% of the variance in SOC storage combined with SIC. Taken together, these two statistical analyses can support that microbial residues can serve as an indicator of SIC transition to SOC. This study highlights the regulation of microbial residues in SIC cycling, enhancing the role of SIC playing in C biogeochemical cycles and enriching organic C reservoirs in coastal saline soils.

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Regulating Bacterial Behavior within Hydrogels of Tunable Viscoelasticity

2022

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Engineered living materials (ELMs) are a new class of materials in which living organism incorporated into diffusive matrices uptake a fundamental role in material's composition and function. Understanding how the spatial confinement in 3D can regulate the behavior of the embedded cells is crucial to design and predict ELM's function, minimize their environmental impact and facilitate their translation into applied materials. This study investigates the growth and metabolic activity of bacteria within an associative hydrogel network (Pluronic‐based) with mechanical properties that can be tuned by introducing a variable degree of acrylate crosslinks. Individual bacteria distributed in the hydrogel matrix at low density form functional colonies whose size is controlled by the extent of permanent crosslinks. With increasing stiffness and elastic response to deformation of the matrix, a decrease in colony volumes and an increase in their sphericity are observed. Protein production follows a different pattern with higher production yields occurring in networks with intermediate permanent crosslinking degrees. These results demonstrate that matrix design can be used to control and regulate the composition and function of ELMs containing microorganisms. Interestingly, design parameters for matrices to regulate bacteria behavior show similarities to those elucidated for 3D culture of mammalian cells.

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Mechanical regulation of photosynthesis in cyanobacteria

Cited by 30 publications

References 72 publications

Microbial residues as indicator for inorganic carbon transition to organic carbon in coastal saline soils

Microbial residues as indicator for inorganic carbon transition to organic carbon in coastal saline soils

Microbial residues as the nexus transforming inorganic carbon to organic carbon in coastal saline soils

Regulating Bacterial Behavior within Hydrogels of Tunable Viscoelasticity

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