Die Verteilung des Orthophosphates auf Plastiden, Cytoplasma und Vacuole in der Blattzelle und ihre Veränderung im Licht-Dunkel-Wechsel
Die Verteilung des Orthophosphates auf Plastiden, Cytoplasma und Vacuole in der Blattzelle und ihre Veränderung im Licht-Dunkel-Wechsel
The distribution of orthophosphate between chloroplasts and the nonchloroplast parts of leaf cells has been investigated. Upon illumination, the percentage of the total orthophosphate located in the chloroplasts decreases rapidly, while darkening results in a slow increase of that percentage to the...
Saved in:
Personal Name(s): | Ullrich, W. |
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Urbach, W. / Santarius, K. A. / Heber, U. | |
Contributing Institute: |
Publikationen vor 2000; PRE-2000; Retrocat |
Imprint: |
Jülich
Kernforschungsanlage Jülich, Verlag
1965
|
Physical Description: |
p. 905-10 |
Document Type: |
Report Book |
Research Program: |
ohne Topic |
Series Title: |
Berichte der Kernforschungsanlage Jülich
320 |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
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245 | |a Die Verteilung des Orthophosphates auf Plastiden, Cytoplasma und Vacuole in der Blattzelle und ihre Veränderung im Licht-Dunkel-Wechsel | ||
260 | |a Jülich |c 1965 |b Kernforschungsanlage Jülich, Verlag | ||
300 | |a p. 905-10 | ||
490 | 0 | |a Berichte der Kernforschungsanlage Jülich |v 320 | |
520 | |a The distribution of orthophosphate between chloroplasts and the nonchloroplast parts of leaf cells has been investigated. Upon illumination, the percentage of the total orthophosphate located in the chloroplasts decreases rapidly, while darkening results in a slow increase of that percentage to the original dark value. lf, in the dark, comparable concentrations of orthophosphate in the chloroplasts and in the cytoplasm are assumed, the concentration of orthophosphate in the vacuole can be calculated from the available data. Values are then obtained, which are considerably lower than the corresponding values in the protoplasm; this indicates that a concentration gradient for orthophosphate is maintained between the cytoplasm and the vacuole. Leaves of spinach and Elodea, which were fed $^{32}$P for 2 to 4 hours and then left to stand for two or three days, showed higher specific activities of orthophosphate in the chloroplasts than in the nonchloroplast parts of the cells. Since there is reasn to assume a fairly rapid exchange of orthophosphate between chloroplasts and cytoplasm, the differences in the specific activities which were observed several days after feeding with $^{32}$P, point to a very slow exchange of orthophosphate across the tonoplast membrane. | ||
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