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Volatile Metabolites Controlling Germination in Buried Weed Seeds

Diamond Shamrock Corporation, T. R. Evans Research Center, P. O. Box 348, Painesville, Ohio 44077

Velvetleaf (Abutilon theophrasti Medic), morning glory (Ipomoea purpurea [L.] Roth), and wild mustard (Brassica kaber [D.C.] L. C. Wheeler) seeds exhibited decreased germination with increased planting depth in soil. Flushing the soil for 2 minutes each day with air overcame the inhibition. A sealed in vitro system was used to sample the volatile components produced by weed seeds. Inhibition of seed germination was accompanied by decreased O₂ levels and production of volatile metabolites identified as acetaldehyde, ethanol, and acetone. The effectiveness of these compounds in reducing germination was dependent on O₂ levels.

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				S. Benvenuti Soil Texture Involvement in Germination and Emergence of Buried Weed Seeds Agron. J., January 1, 2003; 95(1): 191 - 198. [Abstract] [Full Text] [PDF]