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Dormancy Characteristics in Chicory (Cichorium intybus L.) Root  

Bae, Kang-Soon (Iksan Branch of National Seed Management Office)
Kim, Ho-Cheol (Division of Horticulture and Pet Animal-Plant Science, Wonkwang University)
Bae, Jong-Hyang (Division of Horticulture and Pet Animal-Plant Science, Wonkwang University)
Publication Information
Journal of Bio-Environment Control / v.15, no.4, 2006 , pp. 417-420 More about this Journal
Abstract
To investigated the dormancy of chicory (Cichorium intybus L.) for production of high quality rootstocks, growth characteristics and abscisic acid (ABA) contents was conducted. The accumulation hours below $5^{\circ}C$ in field was increased slowly from October 7 to December 3, but there after increased largely. The rootstock weights was increased from the end of October to December 3, there after was not changed to December 3. ABA contents within the rootstock was not changed from October 7 to December 3, and there was suddenly increased for two weeks to December 24. As results of the sudden changed date of accumulation hours below $5^{\circ}C$, stopped date and period of rootstock growth, and sudden changed period of ABA contents, chicory has internal dormancy for two weeks from December 3 and low temperature requirement hours for the dormancy breaking is about 240.
Keywords
dormancy; dormancy breaking; low temperature requirement hours; rootstock;
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