Bicarbonate ion assimilation in photosynthesis by Sargassum muticum

1968 ◽  
Vol 46 (4) ◽  
pp. 411-415 ◽  
Author(s):  
E. Ann Thomas ◽  
E. B. Tregunna
Keyword(s):  
Inorganic Carbon ◽  
Carbon Assimilation ◽  
Gas Analysis ◽  
Sargassum Muticum ◽  
Carbon Uptake

Net inorganic carbon assimilation by Sargassum muticum was recorded in the light up to pH 9.9 and at pCO2 down to less than 5 p.p.m. Carbon uptake was measured on the basis of changes in the CO2 released by acid from 1-ml samples of the experimental seawater, and also calculated from pCO2, and pH according to standard tables. The pCO2 was monitored by infrared gas analysis. It was concluded that this alga assimilated HCO3− ion directly in photosynthesis.

scholarly journals Ecophysiological traits of mixotrophic Strombidium spp

2020 ◽  
Vol 42 (5) ◽  
pp. 485-496 ◽  
Author(s):  
Maira Maselli ◽  
Andreas Altenburger ◽  
Diane K Stoecker ◽  
Per Juel Hansen
Keyword(s):  
Inorganic Carbon ◽  
Algal Species ◽  
Carbon Assimilation ◽  
Total Carbon ◽  
Carbon Uptake ◽  
Prey Concentration ◽  
Ecophysiological Traits ◽  
Uptake Rates ◽  
Small Primary ◽  
Inorganic Carbon Uptake

Abstract Ciliates represent an important trophic link between nanoplankton and mesoplankton. Many species acquire functional chloroplasts from photosynthetic prey, being thus mixotrophs. Little is known about which algae they exploit, and of the relevance of inorganic carbon assimilation to their metabolism. To get insights into these aspects, laboratory cultures of three mixotrophic Strombidium spp. were established and 35 photosynthetic algal species were tested as prey. The relative contributions of ingestion and photosynthesis to total carbon uptake were determined, and responses to prey starvation were studied. Ciliate growth was supported by algal species in the 2–12 μm size range, with cryptophytes and chlorophytes being the best prey types. Inorganic carbon incorporation was only quantitatively important when prey concentration was low (3–100 μgCL−1), when it led to increased gross growth efficiencies. Chla specific inorganic carbon uptake rates were reduced by 60–90% compared to that of the photosynthetic prey. Inorganic carbon uptake alone could not sustain survival of cultures and ciliate populations declined by 25–30% during 5 days of starvation. The results suggest that mixotrophy in Strombidium spp. may substantially bolster the efficiency of trophic transfer when biomass of small primary producers is low.

Monitoring and modelling an industrial trickling filter using on-line off-gas analysis and respirometry

2000 ◽  
Vol 41 (12) ◽  
pp. 139-148 ◽  
Author(s):  
H. Vanhooren ◽  
D. Demey ◽  
I. Vannijvel ◽  
P. A. Vanrolleghem
Keyword(s):  
Phase Equilibrium ◽  
Model Calibration ◽  
Inorganic Carbon ◽  
Diffusion Constant ◽  
Gas Analysis ◽  
Trickling Filter ◽  
Process Characteristics ◽  
Substrate Diffusion ◽  
On Line ◽  
Ph Dependent

The process characteristics of an industrial scale trickling filter plant were quantified by means of a five day intensive measurement campaign with the use of on-line respirometry and on-line off-gas analysis. Respirometry was used to measure the readily biodegradable CODst and the off-gas sensor was used to monitor the O2 and CO2 content of the off-gases. To model the biodegradation in the filters, the model developed by Rauch et al. (1999) was used. It is based on the decoupling of two basic processes in biofilm systems, substrate diffusion and biodegradation. This model was extended with equations for the production and the pH-dependent liquid-phase equilibrium for inorganic carbon (IC). The measured effluent and off-gas concentrations could be followed very closely by the calibrated model. O2 and CO2 measurements revealed that the system was not always oxygen limited. The model calibration thus required the use of a very low value of the diffusion constant for readily biodegradable substrate.

scholarly journals Inorganic carbon uptake in a freshwater diatom, Asterionella formosa (Bacillariophyceae): from ecology to genomics

Phycologia ◽  
2021 ◽  
pp. 1-12
Author(s):  
Stephen C. Maberly ◽  
Brigitte Gontero ◽  
Carine Puppo ◽  
Adrien Villain ◽  
Ilenia Severi ◽  
...  
Keyword(s):  
Inorganic Carbon ◽  
Carbon Uptake ◽  
Asterionella Formosa ◽  
Inorganic Carbon Uptake ◽  
Freshwater Diatom

scholarly journals Supplementary material to "Coupled Ca and inorganic carbon uptake suggested by magnesium and sulfur incorporation in foraminiferal calcite"

2018 ◽  
Author(s):  
Inge van Dijk ◽  
Christine Barras ◽  
Lennart Jan de Nooijer ◽  
Aurélia Mouret ◽  
Esmee Geerken ◽  
...  
Keyword(s):  
Inorganic Carbon ◽  
Carbon Uptake ◽  
Supplementary Material ◽  
Inorganic Carbon Uptake

scholarly journals Quantitative effects of environmental variation on stomatal anatomy and gas exchange in a grass model

2021 ◽  
Author(s):  
Tiago DG Nunes ◽  
Magdalena W Slawinska ◽  
Heike Lindner ◽  
Michael T Raissig
Keyword(s):  
Gas Exchange ◽  
Anatomical Variation ◽  
Brachypodium Distachyon ◽  
Carbon Assimilation ◽  
Light Response ◽  
Gas Analysis ◽  
Environmental Signals ◽  
Grass Model ◽  
Kinetics Of

Stomata are cellular pores on the leaf epidermis that allow plants to regulate carbon assimilation and water loss. Stomata integrate environmental signals to regulate pore apertures and optimize gas exchange to fluctuating conditions. Here, we quantified intraspecific plasticity of stomatal gas exchange and anatomy in response to seasonal variation in Brachypodium distachyon. Over the course of two years we (i) used infrared gas analysis to assess light response kinetics of 120 Bd21-3 wild-type individuals in an environmentally fluctuating greenhouse and (ii) microscopically determined the seasonal variability of stomatal anatomy in a subset of these plants. We observed systemic environmental effects on gas exchange measurements and remarkable intraspecific plasticity of stomatal anatomical traits. To reliably link anatomical variation to gas exchange, we adjusted anatomical gsmax calculations for grass stomatal morphology. We propose that systemic effects and variability in stomatal anatomy should be accounted for in long-term gas exchange studies.

Role of intracellular carbonic anhydrase in inorganic-carbon assimilation by Porphyridium purpureum

Planta ◽  
1987 ◽  
Vol 172 (4) ◽  
pp. 508-513 ◽  
Author(s):  
G. K. Dixon ◽  
B. N. Patel ◽  
M. J. Merrett
Keyword(s):  
Carbonic Anhydrase ◽  
Inorganic Carbon ◽  
Carbon Assimilation ◽  
Porphyridium Purpureum

[57] Inorganic carbon uptake by cyanobacteria

1988 ◽  
pp. 534-539 ◽  
Author(s):  
Aaron Kaplan ◽  
Yehouda Marcus ◽  
Leonora Reinhold
Keyword(s):  
Inorganic Carbon ◽  
Carbon Uptake ◽  
Inorganic Carbon Uptake
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