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The Center for Native Grasslands Management




Title: Response of two switchgrass ecotypes to seed storage conditions and prechilling
Year: 2002
Author(s): Grabowski, J., Douglas, J., Lang, D., Meints, P., Watson, C.
Source Title: Proceedings of the Third Eastern Native Grass Symposium
Source Type: Proceedings
pages: 292
Original Publication:  
Abstract: Freshly harvested switchgrass seeds exhibit widely varying levels of innate seed dormancy. Seed storage conditions have been shown to affect the maintenance of dormancy. Studies were conducted at the USDA Natural Resources Conservation Service Jamie L. Whitten Plant Materials Center, Coffeeville, MS to determine the response of Alamo and a native collection (746) to storage environment, storage duration, and prechilling treatment. Seeds of 746 responded positively to both a 14-day cold, moist prechill at 7 degrees Celsius and higher storage temperatures, experienced in both a room temperature storage environment (approximately 21 degrees Celsius) and during the spring and summer months in a warehouse environment (approximately 38 degrees Celsius). The response decreased with increase storage duration. Alamo showed little response to either storage environment or prechilling. Some dormancy was retained in the 746 seeds throughout the 11-month storage period in all environments; however, storage in a seed cooler at 7 degrees Celsius resulted in increased dormancy. Seed lots with an increased level of innate dormancy such as 746, may require higher storage temperatures or prechilling before planting to ensure germination. Seed lots with a lower level of innate dormancy will not benefit from such treatments.
Publisher: The North Carolina Botanical Garden, Chapel Hill, NC, October 1-3, 2002. Omnipress, Madison, WI
Editor(s): J. Randall
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