| | 1 | Author
| J. Sym | Requires cookie* | | | Title
| The Role of D 1* in Light-Induced D 1 Protein Turnover in Leaves  | | | | Abstract
| ea, H arald R . B olh à r-N ord en kam pfb, and C hrista C ritch ley3 Light-induced degradation o f the D 1 protein of photosystem II (PS II) was determined by radioactive pulse-chase labelling experiments in intact leaves o f Schefflera polybotrya. PS II photochemical efficiency was monitored by measuring chlorophyll fluorescence. A significant and consistent decline in the F J F m ratio was taken to indicate photoinhibition. The formation and degradation o f a modified form o f the D 1 protein, D 1*, was different under photoinhibi-tory or non-photoinhibitory light conditions. At photoinhibitory irradiance greater amounts o f D 1 * were formed relative to D 1, and the degradation of D 1* was slower when compared with non-photoinhibitory irradiance. The formation and degradation o f D 1* were therefore shown to be at least partly light intensity dependent. Higher light intensities appeared to slow D 1* degradation, which suggests a modification in PS II turnover properties. | | | |
Reference
| Z. Naturforsch. 48c, 246 (1993); received December 12 1992 | | | |
Published
| 1993 | | | |
Keywords
| Photosynthesis, Photosystem II, Photoinhibition, D 1 Degradation, Chlorophyll Fluorescence | | | |
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| default:Reihe_C/48/ZNC-1993-48c-0246.pdf | | | | Identifier
| ZNC-1993-48c-0246 | | | | Volume
| 48 | |
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