Diphenylcarbazone: A Reagent for Photosystem 1 Activity in Chloroplast Fragments
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چکیده
منابع مشابه
Quantum requirement of photosystem I mediated ATP formation in chloroplast fragments.
Light dependent ATP formation in chloroplasts is coupled to electron transport. The number of quanta required to form a molecule of ATP in various types of electron transport may contribute to our understanding of the nature of coupling of ATP to electron transfer [l] . In contrast to electron transport the light intensity curve for photophosphorylation shows a distinct lag [2,3]. Large quantum...
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Photosystem I fragments were prepared by digitonin treatment of spinach chloroplasts. The midpoint potential of cytochrome b6 in the fragments is close to 0V, showing a one electron transition. No cytochrome b559 was detectable, neither in difference absorption spectra nor in light-induced absorbance changes. In the absence of added cofactors only cytochrome b6 photoreduction can be observed. T...
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High concentrations of both bicarbonate and formate inhibit photosynthetic O(2) evolution at pH 8.0. At this pH, only 2.4% of the total dissolved carbon dioxide exists as CO(2). At pH 7.3, where 11% of the total dissolved carbon dioxide exists as CO(2), HCO(3) (-) no longer inhibits. While formate still inhibits O(2) evolution at pH 7.3, its effect can be partially overcome if CO(2) is also pre...
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Cu-INDUCED CHANGES IN CHLOROPLAST LIPIDS AND PHOTOSYSTEM 2 ACTIVITY IN BARLEY PLANTS
A. Vassilev* 1, F. Lidon2, P. Scotti Campos3, J. C. Ramalho4, M. G. Barreiro3, I. Yordanov5 1Agricultural University of Plovdiv, Dept. Plant Physiology and Biochemistry, 12 Mendeleev St., 4000 Plovdiv, Bulgaria 2Grupo de Disciplinas de Ecologia da Hidrosferat, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2825-114 Caparica, Portugal 3Plant Physiology Department, Estação Agron...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1972
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.49.5.862