کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9884710 | 1537060 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Equilibration between cytochrome f and P700 in intact leaves
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Equilibration between cytochrome f and P700 in intact leaves Equilibration between cytochrome f and P700 in intact leaves](/preview/png/9884710.png)
چکیده انگلیسی
We have critically reexamined methods for deconvoluting cytochrome f absorbance signals in intact leaves. We have determined the decay of cytochrome f+ following light to dark transitions from steady state and compared this with the decay of the oxidised photosystem I primary donor, P700+. Measurements across a wide range of different irradiances and CO2 concentrations were all consistent with cyt f and P700 existing in redox equilibrium, with a potential difference of around 117 mV. These results are discussed in relation to our understanding of the organisation of the photosynthetic electron transport. They also have implications for measurements of PSI electron flux-provided more than about 20% of P700+ is oxidised in the light, then the initial decay in the concentration of P700+ following a light to dark transition provides a good estimate of electron flux through PSI. Where P700 is largely reduced in the light, net reduction of cyt f+ might need to be corrected for.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1706, Issues 1â2, 7 January 2005, Pages 105-109
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1706, Issues 1â2, 7 January 2005, Pages 105-109
نویسندگان
Alison J. Golding, Pierre Joliot, Giles N. Johnson,