Dormancy Mechanism and the Effect of Scarification in the Germination of Halimium halimifolium Seeds |
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| Affiliation: | 1. Department of Public Health Sciences/SoRAD, Stockholm University, SE-10691 Stockholm, Sweden;2. National Institute for Health and Welfare, P.O. Box 30, FI-00271 Helsinki, Finland;1. College of Horticulture, Qingdao Agricultural University, No.700 Changcheng Road, Chengyang District, Qingdao, Shandong 266109, PR China;2. College of Life Science, Qingdao Agricultural University, No.700 Changcheng Road, Chengyang District, Qingdao, Shandong 266109, PR China;3. Central Laboratory, Qingdao Agricultural University, No.700 Changcheng Road, Chengyang District, Qingdao, Shandong 266109, PR China |
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| Abstract: | Germination of Halimium halimifolium seeds was very low during the experimental period. The scarification treatment enhanced the germination significantly at all the three temperatures tested, indicating that H. halimifolium seeds are endowed with complex dormancy mechanisms. The highest temperature (30°C) showed an adverse effect which can be correlated with a secondary dormancy at embryo level.The lipidic nature of H. halimifolium exotesta is probably the first factor causing dormancy in this species, acting both as a water and oxygen barrier. We can conclude that H halimifolium shows a tegumentary dormancy, which is presumably located at exotesta level. |
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