American Potato Journal

, Volume 74, Issue 3, pp 173–182 | Cite as

Enhanced dormancy release and emergence from potato tubers after exposure to a controlled atmosphere

  • Warren K. Coleman
  • Jeff McInerney


The North American potato industry requires an effective and environmentally-appropriate, dormancy-release methodology. The present study examined dormancy release and subsequent sprout emergence based on a modified, controlled-atmosphere (CA) approach using such environmentallycompatible gases as nitrogen, carbon dioxide and oxygen with or without trace amounts of ethylene (50 ppm). This paper is the first published report of a semi-automated, controlled-atmosphere system for dormancy release of potato tubers. The system allows computer-controlled gas application and analysis for up to four gas mixtures simultaneously. Low oxygen concentrations (< 10%) for 10 days in the presence of 10 to 60% carbon dioxide or a high carbon dioxide (60%)/oxygen (40%) treatment caused tuber breakdown regardless of cultivar. The most effective mixtures for enhanced dormancy release and sprout emergence were 20% CO2/40% O2 or 60% CO2/18-20% O2 and their effects were further enhanced by 50 ppm C2H4 (ethylene). In the presence of 50 ppm C2H4 the 20% CO2/40% O2 mixture was comparable to bromoethane in effectiveness. Temperature and light exposure affected subsequent Russet Burbank tuber responses to CO2/O2/C2H4 gas mixtures.

Additional Key Words

S. tuberosum carbon dioxide oxygen ethylene 


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Copyright information

© Springer 1997

Authors and Affiliations

  • Warren K. Coleman
    • 1
  • Jeff McInerney
    • 2
  1. 1.Potato Research CentreAgriculture and Agri-Food CanadaFredericton
  2. 2.Energy Conversion Group, Department of Civil EngineeringUniversity of New BrunswickFredericton

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