Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 13:159-161 (1973)
© 1973 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Induction of Germination of Impermeable Cottonseed by Electrical Treatment

R. B. Stone, M. N. Christiansen, S. O. Nelson, J. C. Webb, J. L. Goodenough and L. E. Stetson2

Electric glow-discharge and radiofrequency (RF) electricfield treatments were studied for inducing germination of impermeable cottonseed in selection 16-B-7 of Gossypium hirsutum L. Seed was exposed for 8 min in an evacuated glass tube chamber to the glow discharge established by application of 60-Hz and 15- and 17.5-kHz voltages to electrodes in the tube. Germination of impermeable cottonseed was increased from less than 10% to levels in the 60 to 90% range. Significant increases in germination were also achieved by exposure of seed to 40-MHz electric fields of intensities ranging from 1.3 to 3.1 kilovolts/cm, but germination was not generally increased as much as by glow-discharge treatments. RF treatments increased field emergence of a sawginned seed lot from 50 to 76%, but glow-discharge treatments gave no significant increase for this seed lot. Glow-discharge treatments offer a possible method for overcoming impermeability, but variation in cultivar response and seed storage conditions in relation to treatment needs further evaluation.

Key Words: Seed treatment • Seed dormancy • Germination

2 Respectively, Agricultural Engineer, AE, ARS, USDA, Knoxville, Tenn.; Plant Physiologist, ARS, USDA, Beltsville, Md.; Research Investigations Leader, AE, ARS, USDA. Lincoln. Neb.; Agricultural Engineer, AE, ARS, USDA, Gainesville, Fla. (formerly Knoxville, Tenn.); Agricultural Engineer, AE, ARS, USDA, Knoxville, Tenn.; and Agricultural Engineer, AE. ARS. USDA, Lincoln, Neb.

Received for publication September 14, 1972.




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