Replacement of light by dibutyryl-CAMP and CAMP in betacyanin synthesis |
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Authors: | Dora Rast Romana Skřivanová Reinhard Bachofen |
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Affiliation: | Institute of General Botany, University of Zürich, Switzerland |
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Abstract: | The effect of adenosine 3′,5′-cyclic monophosphate and its N6,O2′- dibutyryl derivative (Bu2-CAMP) on betacyanin formation in etiolated Amaranthus paniculatus seedlings was investigated. Both substances can replace the action of light in the synthesis of these pigments, the formation of which is controlled by phytochrome. The specificity of this mimicry is underlined by the observations that sodium butyrate does not promote any betacyanin formation and that theophylline enhances the effect of Bu2-AMP. Puromycin inhibits the induction of betacyanin synthesis by Bu2-CAMP just as it does the light-induced pigment formation. These findings suggest that phytochrome exerts its controlling role in the synthesis of betacyanins through the agency of CAMP. |
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Keywords: | Amaranthaceae betacyanin synthesis phytochrome |
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