Development and storage of recalcitrant seeds of Hopea hainanensis
Seed storage of Hopea hainanensis is problematic because its seeds are sensitive to desiccation and low temperature. In this study, we aimed to determine the best developmental stage for seed collection and the best moisture content (MC) and temperature for seed storage. Mass maturity occurred at about 173 days after anthesis (DAA); seeds harvested at this stage and later (183 DAA) were more desiccation tolerant than seeds harvested 14 d earlier (159 DAA). The freshly-collected pre-mass maturity, mass maturity and post-mass maturity seeds with initial MC of 44.7, 39.8 and 38.2%, respectively, remained viable during 14 months storage at 15 or 20°C with 87-91% germination. However, slightly dried post-mass maturity seeds (dried to MC of 33.9 and 31.5%) had higher viability than fresh seeds after 26 months storage at 20°C; the most favourable storage temperatures were 15 and 20°C. There was higher germination of seeds harvested at or after mass maturity (fresh or dried) than of seeds harvested before mass maturity, during storage at 4 or 10°C.
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Document Type: Research Article
Publication date: July 1, 2012
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