Inhibitory effect of self-generated extracellular dissolved organic carbon on carbon dioxide fixation in sulfur-oxidizing bacteria during a chemoautotrophic cultivation process and its elimination

2018 ◽  
Vol 252 ◽  
pp. 44-51 ◽  
Author(s):  
Ya-nan Wang ◽  
Yiu Fai Tsang ◽  
Lei Wang ◽  
Xiaohua Fu ◽  
Jiajun Hu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Inhibitory Effect ◽  
Carbon Dioxide Fixation ◽  
Cultivation Process ◽  
Sulfur Oxidizing ◽  
Sulfur Oxidizing Bacteria

scholarly journals Effect of carbon and nitrogen addition on nitrous oxide and carbon dioxide fluxes from thawing forest soils

2017 ◽  
Vol 31 (3) ◽  
pp. 339-349 ◽  
Author(s):  
Wu Haohao ◽  
Xu Xingkai ◽  
Duan Cuntao ◽  
Li TuanSheng ◽  
Cheng Weiguo
Keyword(s):  
Carbon Dioxide ◽  
Nitrous Oxide ◽  
Soil Moisture ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Forest Soils ◽  
Mixed Forest ◽  
Soil Core ◽  
Total N ◽  
Nitrogen Inputs

AbstractPacked soil-core incubation experiments were done to study the effects of carbon (glucose, 6.4 g C m−2) and nitrogen (NH4Cl and KNO3, 4.5 g N m−2) addition on nitrous oxide (N2O) and carbon dioxide (CO2) fluxes during thawing of frozen soils under two forest stands (broadleaf and Korean pine mixed forest and white birch forest) with two moisture levels (55 and 80% water-filled pore space). With increasing soil moisture, the magnitude and longevity of the flush N2O flux from forest soils was enhanced during the early period of thawing, which was accompanied by great NO3−-N consumption. Without N addition, the glucose-induced cumulative CO2fluxes ranged from 9.61 to 13.49 g CO2-C m−2, which was larger than the dose of carbon added as glucose. The single addition of glucose increased microbial biomass carbon but slightly affected soil dissolved organic carbon pool. Thus, the extra carbon released upon addition of glucose can result from the decomposition of soil native organic carbon. The glucose-induced N2O and CO2fluxes were both significantly correlated to the glucose-induced total N and dissolved organic carbon pools and influenced singly and interactively by soil moisture and KNO3addition. The interactive effects of glucose and nitrogen inputs on N2O and CO2fluxes from forest soils after frost depended on N sources, soil moisture, and vegetation types.

Carbocentric limnology: looking back, looking forward

2008 ◽  
Vol 65 (3) ◽  
pp. 543-548 ◽  
Author(s):  
Yves T Prairie
Keyword(s):  
Carbon Dioxide ◽  
Organic Matter ◽  
Microbial Community ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Carbon Budget ◽  
Metabolic Balance ◽  
Lake Ecosystems ◽  
Looking Back ◽  
Landscape Level

In this perspective article, I argue that dissolved organic carbon occupies a central role in the functioning of lake ecosystems, comparable in importance to that played by nutrients. Because lakes receive so much dissolved organic carbon from the terrestrial landscape, its accumulation in water bodies usually represents the largest pool of lacustrine organic matter within the water column. The transformation of even a small fraction of this external carbon by the microbial community can alter significantly the metabolic balance of lake ecosystems, simultaneously releasing carbon dioxide to the atmosphere and burying organic carbon in lake sediments. At the landscape level, even if they occupy a small fraction of the landscape, lakes play a surprisingly important role in the regional carbon budget, particularly when considered at the appropriate temporal scale.

scholarly journals Analysis of differential protein expression during growth states of Ferroplasma strains and insights into electron transport for iron oxidation

Microbiology ◽  
2005 ◽  
Vol 151 (12) ◽  
pp. 4127-4137 ◽  
Author(s):  
Mark Dopson ◽  
Craig Baker-Austin ◽  
Philip L. Bond
Keyword(s):  
Carbon Dioxide ◽  
Electron Transport ◽  
Organic Carbon ◽  
Protein Expression ◽  
Energy Demand ◽  
Iron Oxidation ◽  
Acid Leaching ◽  
Carbon Dioxide Fixation ◽  
Spectrophotometric Analysis ◽  
Terminal Electron Acceptor

To investigate the metabolic biochemistry of iron-oxidizing extreme acidophiles, a proteomic analysis of chemomixotrophic and chemo-organotrophic growth, as well as protein expression in the absence of organic carbon, was carried out in Ferroplasma species. Electron transport chain inhibitor studies, spectrophotometric analysis and proteomic results suggest that oxidation of ferrous iron may be mediated by the blue copper-haem protein sulfocyanin and the derived electron passes to a cbb 3 terminal electron acceptor. Despite previous suggestions of a putative carbon dioxide fixation pathway, no up-regulation of proteins typically associated with carbon dioxide fixation was evident during incubation in the absence of organic carbon. Although a lack of known carbon dioxide fixation proteins does not constitute proof, the results suggest that these strains are not autotrophic. Proteins putatively involved in central metabolic pathways, a probable sugar permease and flavoproteins were up-regulated during chemo-organotrophic growth in comparison to the protein complement during chemomixotrophic growth. These results reflect a higher energy demand to be derived from the organic carbon during chemo-organotrophic growth. Proteins with suggested function as central metabolic enzymes were expressed at higher levels during chemomixotrophic growth by Ferroplasma acidiphilum YT compared to ‘Ferroplasma acidarmanus’ Fer1. This study addresses some of the biochemical and bioenergetic questions fundamental for survival of these organisms in extreme acid-leaching environments.

scholarly journals Organic Particles Affect Carbon Cycling in Boreal Waters

Eos ◽  
2019 ◽  
Vol 100 ◽  
Author(s):  
Aaron Sidder
Keyword(s):  
Carbon Dioxide ◽  
Particulate Matter ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Carbon Cycling ◽  
Significant Role ◽  
Carbon Dioxide Emissions ◽  
Organic Particles

Dissolved organic carbon receives much of the focus in aquatic research, but a new study suggests that bulkier particulate matter may play a significant role in regulating carbon dioxide emissions.

scholarly journals Decoupling of carbon dioxide and dissolved organic carbon in boreal headwater streams

2016 ◽  
Vol 121 (10) ◽  
pp. 2630-2651 ◽  
Author(s):  
Mattias Winterdahl ◽  
Marcus B. Wallin ◽  
Reinert Huseby Karlsen ◽  
Hjalmar Laudon ◽  
Mats Öquist ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Headwater Streams
Sign in / Sign up

Export Citation Format

Share Document