查看更多>>摘要：Cyclobalanopsis gilva is a native large broadleaf tree species that has potential for afforestation in Taiwan. The purpose of this study was to examine the germination characteristics and seed storage behavior of C. gilva so as to determine efficientpretreatment for germination and an appropriate seed storage method. Results showed that some mature seeds of C. gilva had shallow dormancy, and the dormancy could be broken by 1-15°C stratification. Fresh mature seeds of C. gilva had a little bit slowgermination and took about 12 wk to completely germinate with a mean germination time (MGT) of about 42 d under fluctuating temperatures of 30/20°C with 8 h of light. Stratification at 1-15°C for longer than 1 mo completely broke the dormancy of C. gilva seeds, and significantly decreased the MGT in a germination period of 12 wk. The MGT of fresh mature seeds significantly decreased from about 42 d to 15 d after 4 mo of stratification at 4°C. Thus, we consider that a proportion of C. gilva seeds mayhave physiological dormancy. Therefore, pretreatment with 4°C stratification for the germination of C. gilva seeds is practical for nursery operations. We suggest that pre-chilling at 4°C for 4 mo should be applied to fresh mature seeds of C. gilva. Furthermore, fresh mature seeds of C. gilva were extremely sensitive to desiccation. Seeds completely lost viability when the moisture content dropped below 24%. However, C. gilva seeds maintained their total initial viability for up to 1 yr when stored at1-4°C with moist sphagnum. Thus, seeds of C. gilva are defined as having temperate-recalcitrant storage behavior due to their extreme intolerance of dehydration and high viability with low-temperature moist storage. The optimal seed storage conditionsof C. gilva are moist storage at 1°C for fresh mature seeds, and the initially living seeds still had germinability for up to 1.5 yr.
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