Investigation of the dark metabolism of acetate in photoheterotrophically grown cells ofRhodospirillum rubrum

Microbiology ◽  
2000 ◽  
Vol 69 (1) ◽  
pp. 7-12 ◽  
Author(s):  
I. A. Berg ◽  
E. N. Krasil’nikova ◽  
R. N. Ivanovsky
Keyword(s):  
Dark Metabolism

scholarly journals Dark metabolism: a molecular insight into how the Antarctic sea‐ice diatom Fragilariopsis cylindrus survives long‐term darkness

2019 ◽  
Vol 223 (2) ◽  
pp. 675-691 ◽  
Author(s):  
Fraser Kennedy ◽  
Andrew Martin ◽  
John P. Bowman ◽  
Richard Wilson ◽  
Andrew McMinn
Keyword(s):  
Sea Ice ◽  
Antarctic Sea Ice ◽  
Fragilariopsis Cylindrus ◽  
Dark Metabolism ◽  
The Antarctic ◽  
Insight Into

Formate metabolism and betaine formation in healthy and rust-infected wheat

1970 ◽  
Vol 48 (4) ◽  
pp. 803-811 ◽  
Author(s):  
Margaret S. Bowman ◽  
R. Rohringer
Keyword(s):  
Amino Acids ◽  
Nucleic Acid ◽  
Stem Rust ◽  
Betaine Lipids ◽  
Dark Metabolism ◽  
Synthesis Activity ◽  
C Metabolism ◽  
Wheat Leaves ◽  
Wheat Tissues ◽  
Formate Metabolism

Formate-14C was fed to detached primary leaves of wheat and the distribution of activity among various fractions was examined after 2 to 26 h of metabolism in the light or 4 h of metabolism in the dark.All samples contained activity in free neutral, acidic, and basic compounds. The radioactive metabolites in the basic fraction were examined in detail. Initially, in the light, glutamate, aspartate, serine, and an unknown, chromatographically similar to, but not identical with histidine, contained most of the activity. Activity in betaine increased with time until, at 26 h, it contained nearly half of the activity in this fraction. Following dark metabolism, most of the activity resided in glutamate and serine. Glycine was not radioactive, and most of the activity in serine resided in carbon 3, indicating that formate served as a precursor of C1-units that were used for serine synthesis. Activity was also detected in a number of other amino acids and choline, both in the light and dark.A comparison of formate-14C metabolism in the dark in stem rust resistant and susceptible wheat leaves revealed that betaine, lipids, nucleic acid bound adenine and guanine, and a protein-containing residue from rust-infected susceptible leaves contained much more activity than the corresponding components from healthy susceptible or from healthy or rust-infected resistant leaves.Activity from glycine-2-3H, methionine-14CH3, serine-3-14C, ethanolamine-1,2-14C, and choline-14CH3 was incorporated into betaine in the dark, but was not detected in sarcosine or dimethylglycine. These results support the view that betaine was synthesized from glycine via serine, ethanolamine, and choline with methionine as the methyl donor, and not by direct N-methylation of glycine.Betaine-14CH3 was translocated but not metabolized in healthy or rust-infected primary leaves of wheat, or in aerial portions of adult wheat plants. In these wheat tissues, betaine would thus appear to be a metabolic end product.

NAD-dependent malate dehydrogenase and glyceraldehyde 3-phosphate dehydrogenase isoenzymes play an important role in dark metabolism of various plastid types

Planta ◽  
1998 ◽  
Vol 205 (3) ◽  
pp. 359-366 ◽  
Author(s):  
Jan E. Backhausen ◽  
Susanne Vetter ◽  
Elisabeth Baalmann ◽  
Camillo Kitzmann ◽  
Renate Scheibe
Keyword(s):  
Malate Dehydrogenase ◽  
Dark Metabolism

Coupling dark metabolism to electricity generation using photosynthetic cocultures

2013 ◽  
Vol 111 (2) ◽  
pp. 223-231 ◽  
Author(s):  
Jonathan P. Badalamenti ◽  
César I. Torres ◽  
Rosa Krajmalnik-Brown
Keyword(s):  
Electricity Generation ◽  
Dark Metabolism

THIORHODACEAE: I. THE EFFECTS OF SODIUM THIOGLYCOLATE ON THE PHOTOSYNTHETIC AND DARK METABOLISM OF PURPLE SULPHUR BACTERIA

1958 ◽  
Vol 4 (5) ◽  
pp. 425-433 ◽  
Author(s):  
John J. Taylor
Keyword(s):  
Carbon Dioxide ◽  
Resting Cells ◽  
Sulphur Compounds ◽  
Experimental Conditions ◽  
Organic Sulphur ◽  
Hydrogen Donors ◽  
Sulphur Bacteria ◽  
Pure Cultures ◽  
Dark Metabolism ◽  
Fixation Of Carbon Dioxide

Twenty-two pure cultures of purple sulphur bacteria were investigated for their ability to utilize organic sulphur compounds as hydrogen donors during photosynthesis. Of the 12 compounds tested, only sodium thioglycolate sustained growth of the organisms in the light.Carbon dioxide fixation by illuminated resting cells in the presence of endogenous sulphur or exogenous thiosulphate was inhibited by thioglycolate in proportion to its concentration. The fixation of carbon dioxide by illuminated sulphur-free resting cells harvested from thioglycolate media increased with the thioglycolate concentration to about 0.04 M, but was proportionally inhibited by higher concentrations.Non-illuminated suspensions of resting cells in the presence of endogenous sulphur or exogenous thiosulphate also assimilated carbon dioxide when thioglycolate was added. Inhibition of fixation appeared similar to that occurring in the light. Thioglycolate disappeared from the suspensions in proportion to the amount of bicarbonate assimilated. Thioglycolate-grown cells did not fix significant amounts of carbon dioxide under similar experimental conditions. Growth of the organisms was never demonstrated in non-illuminated thioglycolate media.

scholarly journals Dark Metabolism of Carbon Monoxide in Lettuce Leaf Discs

1982 ◽  
Vol 70 (2) ◽  
pp. 397-400 ◽  
Author(s):  
Galen D. Peiser ◽  
Ma. Concepcion C. Lizada ◽  
Shang Fa Yang
Keyword(s):  
Carbon Monoxide ◽  
Leaf Discs ◽  
Dark Metabolism

scholarly journals A Diel Flux Balance Model Captures Interactions between Light and Dark Metabolism during Day-Night Cycles in C3 and Crassulacean Acid Metabolism Leaves

2014 ◽  
Vol 165 (2) ◽  
pp. 917-929 ◽  
Author(s):  
C.Y. Maurice Cheung ◽  
Mark G. Poolman ◽  
David. A. Fell ◽  
R. George Ratcliffe ◽  
Lee J. Sweetlove
Keyword(s):  
Crassulacean Acid Metabolism ◽  
Acid Metabolism ◽  
Balance Model ◽  
Flux Balance ◽  
Dark Metabolism
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