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Articles

Rapid Metabolism of Propylene by Pea Seedlings ¹

Central Research and Development Department, Experimental Station, E. I. du Pont de Nemours and Company, Wilmington, Delaware 19898

Propylene uptake by intact pea seedlings (Pisum sativum L. cv. Alaska) was easily detected using standard gas chromatographic techniques suggesting rapid metabolism. Comparative studies with highly purified ¹⁴C₃H₆ and ¹⁴C₂H₄ under aseptic conditions verified that propylene was rapidly metabolized and indicated that some aspects of its metabolism were similar to that of ethylene since ¹⁴C₃H₆, like ¹⁴C₂H₄ (Beyer, Nature 1975, 255: 144-147), was oxidized to ¹⁴CO₂ and incorporated into water-soluble tissue metabolites. However, ¹⁴C₂H₆ was metabolized at a substantially faster rate and unlike ¹⁴C₂H₄ the rate of ¹⁴C₃H₆ tissue incorporation exceeded its rate of oxidation to ¹⁴CO₂. In addition the neutral ¹⁴C-metabolites derived from ¹⁴C₃H₆ were chromatographically distinct from those formed from ¹⁴C₂H₄.