{"title":"温度和光合作用。2温度对二氧化碳固定作用的影响机制","authors":"M.J. Selwyn","doi":"10.1016/0926-6585(66)90057-4","DOIUrl":null,"url":null,"abstract":"<div><p></p><ul><li><span>1.</span><span><p>1. A simple model mechanism for photosynthetic CO<sub>2</sub> fixation which incorporates the autocatalytic features of the carbon cycle and a mechanism for bleeding off the intermediates has been postulated to account for the variation in and high values of the activation energy (<em>Q</em><sub>10</sub>) of CO<sub>2</sub> fixation.</p></span></li><li><span>2.</span><span><p>2. The steady-state rate equation for the model is derived and its properties discussed. It is shown that the model can account for the effects of temperature on the rate of CO<sub>2</sub> fixation using reasonable values for the activation energies and heats of reaction of the kinetic constants.</p></span></li><li><span>3.</span><span><p>3. The proposed type of mechanism is compatible with the lag period observed after rewarming whole cells, the lack of a marked effect of temperature on the lag period of isolated chloroplasts and the transient oscillations in the levels of intermediates observed after alteration of the CO<sub>2</sub> concentration.</p></span></li><li><span>4.</span><span><p>4. The importance of the reaction in which intermediates are bled off as a control mechanism in systems involving stoichiometric amplification is considered.</p></span></li></ul></div>","PeriodicalId":100158,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Biophysics including Photosynthesis","volume":"126 2","pages":"Pages 214-224"},"PeriodicalIF":0.0000,"publicationDate":"1966-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0926-6585(66)90057-4","citationCount":"15","resultStr":"{\"title\":\"Temperature and photosynthesis. II. A mechanism for the effects of temperature on carbon dioxide fixation\",\"authors\":\"M.J. Selwyn\",\"doi\":\"10.1016/0926-6585(66)90057-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p></p><ul><li><span>1.</span><span><p>1. A simple model mechanism for photosynthetic CO<sub>2</sub> fixation which incorporates the autocatalytic features of the carbon cycle and a mechanism for bleeding off the intermediates has been postulated to account for the variation in and high values of the activation energy (<em>Q</em><sub>10</sub>) of CO<sub>2</sub> fixation.</p></span></li><li><span>2.</span><span><p>2. The steady-state rate equation for the model is derived and its properties discussed. It is shown that the model can account for the effects of temperature on the rate of CO<sub>2</sub> fixation using reasonable values for the activation energies and heats of reaction of the kinetic constants.</p></span></li><li><span>3.</span><span><p>3. The proposed type of mechanism is compatible with the lag period observed after rewarming whole cells, the lack of a marked effect of temperature on the lag period of isolated chloroplasts and the transient oscillations in the levels of intermediates observed after alteration of the CO<sub>2</sub> concentration.</p></span></li><li><span>4.</span><span><p>4. The importance of the reaction in which intermediates are bled off as a control mechanism in systems involving stoichiometric amplification is considered.</p></span></li></ul></div>\",\"PeriodicalId\":100158,\"journal\":{\"name\":\"Biochimica et Biophysica Acta (BBA) - Biophysics including Photosynthesis\",\"volume\":\"126 2\",\"pages\":\"Pages 214-224\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1966-10-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0926-6585(66)90057-4\",\"citationCount\":\"15\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Biochimica et Biophysica Acta (BBA) - Biophysics including Photosynthesis\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0926658566900574\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biochimica et Biophysica Acta (BBA) - Biophysics including Photosynthesis","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0926658566900574","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Temperature and photosynthesis. II. A mechanism for the effects of temperature on carbon dioxide fixation
1.
1. A simple model mechanism for photosynthetic CO2 fixation which incorporates the autocatalytic features of the carbon cycle and a mechanism for bleeding off the intermediates has been postulated to account for the variation in and high values of the activation energy (Q10) of CO2 fixation.
2.
2. The steady-state rate equation for the model is derived and its properties discussed. It is shown that the model can account for the effects of temperature on the rate of CO2 fixation using reasonable values for the activation energies and heats of reaction of the kinetic constants.
3.
3. The proposed type of mechanism is compatible with the lag period observed after rewarming whole cells, the lack of a marked effect of temperature on the lag period of isolated chloroplasts and the transient oscillations in the levels of intermediates observed after alteration of the CO2 concentration.
4.
4. The importance of the reaction in which intermediates are bled off as a control mechanism in systems involving stoichiometric amplification is considered.
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