Inhibitor Studies on Light-Induced Phosphorylation in Isolated Spinach Chloroplasts.
نویسندگان
چکیده
منابع مشابه
Light-induced Volume Changes in Spinach Chloroplasts
A light-dependent mechanism that results in a slow, high-amplitude swelling of spinach chloroplasts in vitro has been discovered. The swelling is readily observed by optical and gravimetric methods, and by the use of an electronic particle counter; all show a 100 per cent increase of chloroplast volume in the light with an approximately 10-minute half-time. The existence of an osmotic mechanism...
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Upon a light-dark transition chloroplasts emit post-illumination luminescence [l] , which is commonly considered to result from the recombination of positive charges (Z’) and negative charges (Q-) at the photosystem II reaction centers [ 1,2] . Stimulation of post-illumination luminescence by a variety of treatments has been reported (for a recent review, see [3]) such as transthylakoidal ApH [...
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The absorption of light by chloroplasts is the first step for several energy-requiring systems such as ATP synthesis and CO, fixation. Recently. it has been found that light can alter the structure and volume of the chloroplast (7, 15, 17, 26). Therefore the question was raised whether light could affect ion movements in isolated chloroplasts under conditions where structural changes occur. Thi...
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In an earlier note, evidence was presented for the occurrence of a new type of chloroplast-catalyzed photosynthetic phosphorylation called “oxidative photophosphorylation” (I). When spinach chloroplasts are illuminated in the presence of orthophosphate, adenosine diphosphate, and a dye such as trichlorophenol indophenol, adenosine triphosphate is generated provided oxygen is available, but not ...
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The most heat-sensitive functions of chloroplasts in Spinacia oleracea L. including the stromal carboxylation reaction, the light-induced electrical field gradient across the thylakoid membrane, as well as the overall photosynthetic CO(2) fixation were less affected by heat if chloroplasts were heated in the light: 50% inactivation occurred around 35 degrees C in the dark and around 40 degrees ...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1960
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.14-0264