کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10796126 1052694 2005 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A cell-based model for the photoacclimation and CO2-acclimation of the photosynthetic apparatus
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
A cell-based model for the photoacclimation and CO2-acclimation of the photosynthetic apparatus
چکیده انگلیسی
We have developed a mathematical model based on the underlying mechanisms concerning the responses of the photosynthetic apparatus of a microalga cell which grows under constant incident light intensity and ambient CO2 concentration. Photosynthesis involves light and carbon-fixation reactions which are mutually dependent and affect each other, but existing models for photosynthesis don't account for both reactions at once. Our modeling approach allows us to derive distinct equations for the rates of oxygen production, NADPH production, carbon dioxide fixation, carbohydrate production, and rejected energy, which are generally different. The production rates of the photosynthesis products are hyperbolic functions of light and CO2 concentration. The model predicts that in the absence of photoinhibition, CO2-inhibition, photorespiration, and chlororespiration, a cell acclimated to high light and/or CO2 concentration has higher photosynthetic capacity and lower photosynthetic efficiency than does a cell acclimated to low conditions. This results in crossing between the two curves which represent the oxygen production rates and carbon fixation rates in low and high conditions. Finally, in the absence of photoinhibition and CO2-inhibition, the model predicts the carbohydrate production rate in terms of both light intensity and CO2 concentration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1708, Issue 2, 30 June 2005, Pages 250-261
نویسندگان
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