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Plant Physiology 51:432-435 (1973)
© 1973 American Society of Plant Biologists

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Articles

Soybean Polyamines

Separation and Characterization of Cadaverine 1

L. C. Wang and E. Selke

a Northern Regional Research Laboratory, Agricultural Research Service, United States Department of Agriculture, Peoria, Illinois 61604

Cadaverine in soybeans was separated by ion exchange chromatography from other polyamines previously identified. Identification of cadaverine was based on ion exchange separation, thin layer chromatography, paper electrophoresis, mass and nuclear magnetic resonance spectral analyses. Since the molecules of putrescine and cadaverine are so similar, separation and identification of the two components are difficult. Their RF values on thin layer chromatography are close, although cadaverine produces a bluish purple color when sprayed with ninhydrin reagent, while putrescine forms a purple color. Separation likewise is poor by paper electrophoresis, gas chromatography, and gel filtration. The mass spectra of cadaverine and putrescine have m/e peaks at 30, 43, 45, 56, 73, 85, 102 and 30, 43, 59, 71, 88, respectively. The m/e peaks differentiate one compound from the other. Nuclear magnetic resonance spectra and their integration curves show that cadaverine contains two types of methylene protons (10 total) in 3:2 ratio while putrescine produces two types (8 total) in 1:1 ratio. Polyamines occur at levels of micrograms per gram of soybeans with spermidine present in the largest quantity.

1 Presented at the American Society of Plant Physiologists Meeting, Minneapolis, Minn., August 27, 1972.






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