Methods for breaking the dormancy of eastern redbud (Cercis canadensis) seeds
Cercis canadensis is best propagated by using seeds, but the seed dormancy is hard to break. In this paper, we studied the physical and physiological barriers responsible for dormancy of C. canadensis seeds. Results showed that both seed coat and inhibiting substances in the endosperm played a role in dormancy of C. canadensis seeds. Consequently, we evaluated the effects of thermal and chemical scarification, cold and warm stratification, splitting the cotyledon end of the testa, and soaking in gibberellic acid in breaking seed dormancy. All the treatments had a positive effect on seed germination. The best method to break seed dormancy was to immerse seeds in sulphuric acid (98%) for 11-13 minutes, following cold stratification at 4°C for 14 days and soaking in 500 mg l-1 GA3 for 24 hours.
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Document Type: Research Article
Publication date: April 1, 2013
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