Abstract
S ummary Subjecting peas to high pressures of oxygen produced a progressive decrease in CO 2 output with accumulation of citrate, pyruvate, alcohol and acetate (Turner and Quartley, 1956; Pritchard, 1961). The present results show that the progressive decrease in CO 2 output in high oxygen was also, in general, accompanied by large and continuing decreases in adenosine triphosphate and in the glycolytic intermediates, dihydroxyacetone phosphate, 3‐phosphoglycerate and phosphoenolpyruvate. Fructose diphosphate also decreased more rapidly initially in oxygen than in air in three of the four experiments. Oxygen poisoning thus appears to ‘block’ partially or completely, certain respiratory pathways, the most important ‘block’ in plant tissues probably being that at aconitase (Pritchard, 1961). The ‘blocks’ are visualized as decreasing both the CO 2 output and the rate of formation of adenosine triphosphate. Thus in the present experiments the decreased CO 2 output in oxygen was associated with a decrease in content of adenosine triphosphate. The decrease in the content of the latter may in turn reduce the rates of hexokinase and phosphofructokinase phosphoryla‐tion and so cause the observed decreases in contents of fructose diphosphate, and, at late stages, of glucose‐6‐phosphate. The decrease in fructose diphosphate appeared to reduce the rate of glycolysis, as shown by the decrease in the contents of glycolytic intermediates.
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Claims 9
Claim · model-written summary
High oxygen pressure produced a progressive decrease in CO2 output of pea tissue.
- Taxon
- peas
Lathyrus oleraceuse1 - Treatment
- high pressures of oxygene1
- Outcome
- CO 2 outpute1
- Direction
- decreasee1
- Qualifier
- progressivee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Subjecting peas to high pressures of oxygen produced a progressive decrease in CO 2 output with accumulation of citrate, pyruvate, alcohol and acetate”
Claim · model-written summary
High oxygen pressure increased the accumulation of citrate, pyruvate and alcohol in pea tissue.
- Taxon
- peasLathyrus oleraceuse1
- Treatment
- high pressures of oxygene1
- Outcome
- accumulation of citrate, pyruvate, alcohole1
- Direction
- increaseinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Subjecting peas to high pressures of oxygen produced a progressive decrease in CO 2 output with accumulation of citrate, pyruvate, alcohol and acetate”
Claim · model-written summary
High oxygen pressure increased acetate accumulation in pea tissue.
- Taxon
- peasLathyrus oleraceuse1
- Treatment
- high pressures of oxygene1
- Outcome
- acetatee1
- Direction
- increaseinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Subjecting peas to high pressures of oxygen produced a progressive decrease in CO 2 output with accumulation of citrate, pyruvate, alcohol and acetate”
Claim · model-written summary
High oxygen pressure was accompanied by decreases in adenosine triphosphate in pea tissue.
- Taxon
- peasLathyrus oleraceuse1
- Treatment
- high pressures of oxygene1
- Outcome
- adenosine triphosphatee2
- Direction
- decreasese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Subjecting peas to high pressures of oxygen produced a progressive decrease in CO 2 output with accumulation of citrate, pyruvate, alcohol and acetate”
e2“accompanied by large and continuing decreases in adenosine triphosphate and in the glycolytic intermediates”
Claim · model-written summary
High oxygen pressure was accompanied by decreases in glycolytic intermediates in pea tissue.
- Taxon
- peasLathyrus oleraceuse1
- Treatment
- high pressures of oxygene1
- Outcome
- glycolytic intermediatese2
- Direction
- decreasese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Subjecting peas to high pressures of oxygen produced a progressive decrease in CO 2 output with accumulation of citrate, pyruvate, alcohol and acetate”
e2“accompanied by large and continuing decreases in adenosine triphosphate and in the glycolytic intermediates”
Claim · model-written summary
Fructose diphosphate decreased more rapidly initially in oxygen than in air in pea tissue, in three of four experiments.
- Taxon
- peasLathyrus oleraceuse1
- Treatment
- oxygene3
- Outcome
- Fructose diphosphatee3
- Direction
- decreasede3
- Qualifier
- in three of the four experimentse3
- Comparator
- aire3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Subjecting peas to high pressures of oxygen produced a progressive decrease in CO 2 output with accumulation of citrate, pyruvate, alcohol and acetate”
e3“Fructose diphosphate also decreased more rapidly initially in oxygen than in air in three of the four experiments”
Claim · model-written summary
Oxygen poisoning appears to block certain respiratory pathways in pea tissue, probably most importantly at aconitase.
- Taxon
- peasLathyrus oleraceuse1
- Treatment
- Oxygen poisoninge4
- Outcome
- certain respiratory pathwayse4
- Qualifier
- probably being that at aconitasee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Subjecting peas to high pressures of oxygen produced a progressive decrease in CO 2 output with accumulation of citrate, pyruvate, alcohol and acetate”
e4“Oxygen poisoning thus appears to ‘block’ partially or completely, certain respiratory pathways, the most important ‘block’ in plant tissues probably being that at aconitase”
Claim · model-written summary
The decrease in fructose diphosphate appears to reduce the rate of glycolysis in pea tissue.
- Taxon
- peasLathyrus oleraceuse1
- Compound
- fructose diphosphatee5
- Outcome
- rate of glycolysise5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Subjecting peas to high pressures of oxygen produced a progressive decrease in CO 2 output with accumulation of citrate, pyruvate, alcohol and acetate”
e5“The decrease in fructose diphosphate appeared to reduce the rate of glycolysis”
Claim · model-written summary
The decreased CO2 output in high oxygen was associated with a decrease in adenosine triphosphate content in pea tissue.
- Taxon
- peasLathyrus oleraceuse1
- Treatment
- oxygene6
- Outcome
- content of adenosine triphosphatee6
- Direction
- decreasee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Subjecting peas to high pressures of oxygen produced a progressive decrease in CO 2 output with accumulation of citrate, pyruvate, alcohol and acetate”
e6“Thus in the present experiments the decreased CO 2 output in oxygen was associated with a decrease in content of adenosine triphosphate”