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Badretdinov DZ Kuznetsova SA Poltev SV Kukushkin AK 《Bioelectrochemistry (Amsterdam, Netherlands)》2002,56(1-2):13-16
The temperature dependence of parameters of light-induced changes in millisecond delayed luminescence (half-width of the maximum, maximal and steady-state luminescence intensity) is studied within the temperature range from -23 to 45 degrees C in leaf segments of Chinese rose (Hibiscus rosa sinensis). Delayed luminescence (DL) is induced and registered by a homemade setup based on a Lewis-Kasha-type phosphoroscope. The temperature dependence of steady-state luminescence intensity is shown to have two maxima, at -10 and 35 degrees C. At room temperatures, the steady-state value of luminescence intensity is minimal, and its value correlates with the temperature tolerance of the plant. Depending on cooling and heating regimes, the DL steady-state value vs. temperature curves is found to be different. We suppose this effect to be caused by temperature-induced destructive changes in the structure of photosystem 2 reaction centre and probably by salting out. 相似文献
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Tuleshova A Badretdinov D Kukushkin A Khuznetsova S 《Bioelectrochemistry (Amsterdam, Netherlands)》2002,56(1-2):203-205
We have obtained the theoretical dependences of stromal metabolite steady-state concentrations on external inorganic phosphate (P(i)) concentration. For this purpose, the theoretical model of photosynthesis, earlier described in [Ann. Appl. Biol. 138 (2001) 117], was modified to account for the regulation of starch formation by 3-phosphoglycerate (PGA) to P(i) ratio. When the rate constant of starch synthesis is taken to be independent on PGA/P(i) ratio, the steady-state concentrations of Calvin cycle metabolites and starch were found to change insignificantly as external P(i) concentration increases in wide range. However, as external P(i) range exceeds a critical value, the steady-state concentrations of all metabolites change abruptly. If the rate constant of starch synthesis depends on PGA/P(i) ratio, the steady-state concentrations of stromal metabolites change qualitatively in the same way with the increase of external P(i). However, no abrupt changes of metabolite and starch steady-state levels at high concentration of P(i) are observed. These results testify that the control of starch synthesis by PGA/P(i) ratio makes the photosynthetic system more stable in wide range of external P(i) concentrations. 相似文献
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Study of temperature influence on electron transport in higher plants via delayed luminescence method: experiment, theory 总被引:3,自引:0,他引:3
Badretdinov DZ Baranova EA Kukushkin AK 《Bioelectrochemistry (Amsterdam, Netherlands)》2004,63(1-2):67-71
The temperature dependence of steady-state millisecond delayed luminescence (DL) is studied within the temperature range from -23 to 45 degrees C in leaf segments of chinese rose (Hibiscus rosa-sinensis L.) and bean (Ficia faba). To describe the experimental dependence of DL steady-state intensity on temperature theoretically, we suggest the temperature dependences of rate constants in earlier proposed model of photosynthesis. Under these conditions, the temperature dependence of DL steady-state value has the same form as experimental curve. 相似文献
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