Breaking dormancy in seeds of Anisodus tanguticus: an endangered medicinal herb of high altitude in the Qinghai-Tibet Plateau
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: 01 April 2009
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