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Updated: May 3, 2026

Extraction and Quantification of Soluble, Radiolabeled Inositol Polyphosphates from Different Plant Species using SAX-HPLC
Published on: June 26, 2020
Evidence against the occurrence of adenosine-3':5'-cyclic monophosphate in higher plants
1Institute of Plant Physiology, Ruhr-University, Postfach 2148, D-463, Bochum-Querenburg, Federal Republic of Germany.
Abstract:
Previous reports on the incorporation of [(14)C]adenine into adenosine-3':5'-cyclic monophosphate (cyclic AMP) in oat (Avena sativa L.) and maize (Zea mays L.) coleoptile sections, chick-pea (Cicer arietinum L.) embryos and barley (Hordeum vulgare L.) aleurone layers were reexamined. Separation of labelled nucleotides on DEAE-Sephadex A 25 showed that a peak of (14)C activity, previously considered to be cyclic AMP, is not identical with this compound. Attempts to detect the cyclic nucleotide by means of a highly specific protein-kinase assay in various plant tissues (Nicotiana tabacum L., tissue culture; Catharanthus roseus Don., tissue culture; Lycopersicon esculentum Mill, seedlings; Nicotiana tabacum, pith parenchyma; Avena sativa, coleoptiles) failed even though up to 100 g of plant material was extracted and a number of control experiments were carried out to insure that cyclic AMP, if present in the extracts, could be measured.
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