Photooxidation of Plastids Inhibits Transcription of Nuclear Encoded Genes in Rye (Secale cereale).
Rye (Secale cereale cv Halo) seedlings treated with the herbicide Norflurazon SAN 9789 showed a reduced concentration of mRNA for the small subunit of ribulose-1,5-bisphosphate carboxylase and for the light-harvesting chlorophyll a/b protein. The inhibition of mRNA accumulation by Norflurazon occurred only in the presence of high light intensities and only after a period of days. The primary effect was an inhibition of the transcription rate that occurred within 1 day after exposure of the seedlings to light.
Ernst
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Max-Planck-Institut für Biochemie, 8033 Martinsried, Federal Republic of Germany.
Schefbeck
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