The action of cyclic AMP on GA3 controlled responses VI. Characteristics of the promotion of light-inhibited seed germination in Phacelia tanacetifolia by GA3 and cyclic 3',5'-adenosine monophosphate |
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Authors: | Safran Eileen M; Galsky Alan G |
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Institution: | Department of Biology, Bradley University Peoria, Illinois 61606, U.S.A. |
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Abstract: | GA3 and cyclic AMP were found to promote the germination (inlight) of light inhibited Phacelia tanacetifolia seed to thelevels obtained with dark controls. The GA3 and cyclic AMP promotedgermination was inhibited by ABA and cycloheximide but not by6-methyl purine. The hormone and the nucleotide were not requiredfor the entire incubation period to obtain maximum germination. Theophylline and caffeine also promoted germination of theseseeds and 8-bromoadenosine cyclic AMP was found to be a betterpromoter of germination than cyclic AMP. Of a variety of nucleotidestested, only cyclic AMP promoted germination. This study supportsthe hypothesis that cyclic AMP is involved in some manner inGA3-induced seed germination. (Received January 22, 1974; ) |
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