Rhythmic regulation of the light-harvesting chlorophyll a/b protein and the small subunit of ribulose-1,5-bisphosphate carboxylase mRNA in rye seedlings.
In etiolated rye seedlings transferred to light the expression of chlorophyll a/b binding protein mRNA varies when the seedlings are grown in a day/night cycle. The fluctuation pattern follows a circadian rhythm. Exposure of 4-day old etiolated seedlings to continuous white light revealed two maxima within the first 24 h before the 24 h cycle period appeared. These first two maxima are also observable after a pulse of white light or after a pulse of red light. These results indicate a possible involvement of phytochrome in the endogenous regulation of the rhythm.
Max Planck Institut für Biochemie, Martinsried, W. Germany.
D
D
Ernst
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A
Apfelböck
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A
Bergmann
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C
Weyrauch
D002734:Chlorophyll / Q000235:genetics*; D002940:Circadian Rhythm; D002523:Edible Grain / Q000235:genetics*; D005786:Gene Expression Regulation; D045342:Light-Harvesting Protein Complexes; D045322:Photosynthetic Reaction Center Complex Proteins; D010940:Plant Proteins / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics*; D012273:Ribulose-Bisphosphate Carboxylase / Q000235:genetics*; D012434:Secale / Q000201:enzymology / Q000235:genetics*
D045342:Light-Harvesting Protein Complexes; D045322:Photosynthetic Reaction Center Complex Proteins; D010940:Plant Proteins; D012333:RNA, Messenger; D002734:Chlorophyll; D012273:Ribulose-Bisphosphate Carboxylase