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Diurnal periodicity of chalcone-synthase activity during the development of oat primary leaves

✍ Scribed by Hans-Jürgen Peter; Christiane Krüger-Alef; Wolfgang Knogge; Klaus Brinkmann; Gottfried Weissenböck

Publisher
Springer-Verlag
Year
1991
Tongue
English
Weight
933 KB
Volume
183
Category
Article
ISSN
0032-0935

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✦ Synopsis

Chalcone-synthase (CHS) activity was followed during the development of primary leaves of oat (Arena sativa L.) seedlings grown under different illumination conditions. Continuous darkness and continuous light resulted in similar time courses of enzyme activity. The maximum of CHS activity in etiolated leaves was delayed by 1 d and reached about half the level of that of light-grown leaves. In seedlings grown under defined light-dark cycles a diurnal rhythm of CHS activity and its protein level was observed which followed the rhythm of CHS-mRNA translational activity (Knogge et al. 1986). This rhythm persisted in continuous light after a short-term pre-exposure to the light-dark cycle but not in continuous darkness.

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