scholarly journals Energetic Factors Affecting Carbon Dioxide Fixation in Isolated Chloroplasts

1980 ◽  
Vol 65 (3) ◽  
pp. 526-532 ◽  
Author(s):  
Rudolf E. Slovacek ◽  
Geoffrey Hind
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Fixation ◽  
Factors Affecting ◽  
Isolated Chloroplasts

scholarly journals Some effects of sugars and sugar phosphates on carbon dioxide fixation by isolated chloroplasts

1966 ◽  
Vol 101 (3) ◽  
pp. 636-641 ◽  
Author(s):  
C Bucke ◽  
DA Walker ◽  
CW Baldry
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Fixation ◽  
Free Sugars ◽  
Sugar Phosphates ◽  
Related Compounds ◽  
Isolated Chloroplasts

1. Carbon dioxide fixation by isolated pea chloroplasts was stimulated by the addition of intermediates of the Calvin photosynthesis cycle and by some related compounds. 2. Ribose 5-phosphate and fructose 1,6-diphosphate consistently produced the largest effects; free sugars such as erythrose and sedoheptulose and acids such as glycollate and glyoxylate were largely ineffective or even inhibitory. 3. Small effects were produced by fructose and ribose but not by their isomers, glucose and xylose. 4. Maximal rates in the presence of ribose 5-phosphate varied between 10 and 50mumoles of carbon dioxide fixed/mg. of chlorophyll/hr.

scholarly journals Calvin-cycle intermediates in relation to induction phenomena in photosynthetic carbon dioxide fixation by isolated chloroplasts

1966 ◽  
Vol 101 (3) ◽  
pp. 642-646 ◽  
Author(s):  
CW Baldry ◽  
DA Walker ◽  
C Bucke
Keyword(s):  
Carbon Dioxide ◽  
Calvin Cycle ◽  
Carbon Dioxide Fixation ◽  
Chloroplast Envelope ◽  
Induction Periods ◽  
New Synthesis ◽  
Photosynthetic Carbon ◽  
Sugar Phosphates ◽  
Isolated Chloroplasts ◽  
Additional Fixation

1. Induction periods in carbon dioxide fixation by isolated pea chloroplasts were shortened by small quantities of Calvin-cycle intermediates. The additional fixation was larger than that which would have followed direct stoicheiometric conversion into ribulose 1,5-diphosphate. 2. When chloroplasts were illuminated in the absence of added substrates (other than carbon dioxide) soluble products were formed in the medium that stimulated fixation by fresh chloroplasts. 3. The induction periods were lengthened by washing the chloroplasts. Addition of catalytic quantities of Calvin-cycle intermediates then decreased the induction periods to their previous values. 4. The induction period was extended by a decrease in temperature but was largely unaffected by a decrease in light-intensity that was sufficient to decrease the maximum rate. 5. It is concluded that the lag periods are a consequence of the loss of Calvin-cycle intermediates, such as sugar phosphates, through the intact chloroplast envelope and that these losses can be made good by new synthesis from carbon dioxide in the reactions of the Calvin cycle.

Photosynthesis by isolated chloroplasts V. Phosphorylation and carbon dioxide fixation by broken chloroplasts

1956 ◽  
Vol 20 ◽  
pp. 462-468 ◽  
Author(s):  
F.R. Whatley ◽  
M.B. Allen ◽  
L.L. Rosenberg ◽  
J.B. Capindale ◽  
Daniel I. Arnon
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Fixation ◽  
Isolated Chloroplasts
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