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Seed germination and dormancy breaking for Dichotomanthes tristaniaecarpa (Rosaceae), a narrowly distributed and endemic species in south-western China

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Dichotomanthes tristaniaecarpa Kurz, is an endemic and rare ornamental and medicinal plant in south-western China's Yunan and Sichuan provinces. In natural conditions, germination is extremely low and progresses slowly. Different treatments were evaluated to develop a protocol for accelerating the germination of this species. For dormancy-broken seeds, the condition of 10/20°C with a 12 h light period was appropriate. Cold stratification for 60 days resulted in significantly increasing final germination percentages from 13 (fresh seeds) to 97%, the median germination time (MGT) was approximately 17 d and is therefore recommended as the practical germination pre-treatment for propagating D. tristaniaecarpa by seeds. Moreover, among four concentrations applied, 200 mg·L−1 of GA3 was more effective for accelerating germination of 40-d dry stratified seeds and its MGT was about 12 d. Based on the results, 60-d cold stratification (4°C) was the optimal means for alleviating the primary dormancy.
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Document Type: Research Article

Publication date: October 1, 2010

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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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