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Breaking dormancy in seeds of Anisodus tanguticus: an endangered medicinal herb of high altitude in the Qinghai-Tibet Plateau

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Anisodus tanguticus (Maxim) Pascher, is an endemic and threatened medicinal plant in the Qinghai-Tibet Plateau, China. In natural conditions, its germination is low and progresses slowly. Four dormancy breaking treatments, chilling, chilling + gibberellic acid, gibberellic acid and mechanical scarification were used to determine whether they could improve germination. Scarification was the only treatment which allowed germination. Scarification improved germination from 0% (control) to over 70%, and the median germination time was approximately 4.1 d. A. tanguticus seeds therefore have a coat-imposed dormancy, and the hard seed coats act in preventing water absorption and gaseous exchange. These results provide a means to enhance seed germination and may help for propagation of this species.
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Document Type: Research Article

Publication date: April 1, 2009

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  • Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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