文献类型： 外文期刊

作者： Kong, XH ¹ ; Zhang, HY ¹ ;

作者机构： 1.Beijing Vegetable Res Ctr, Beijing 100081, Peoples R China

关键词： germplasm; seed longevity; seed storage; temperature; water content; freeze drying; silica gel drying; heat drying; ultra-dry; Vigna unguiculata; Brassica oleracea; Brassica pekinensis; Brassica chinensis; Allium tuberosum; Cucumis sativus; Cucumis melo; Raphanus sativus; Lycopersicon esculentum

期刊名称：SEED SCIENCE RESEARCH （ 影响因子：2.25； 五年影响因子：2.5 ）

ISSN： 0960-2585

年卷期： 1998 年 8 卷

页码：

收录情况： SCI

摘要： This investigation aimed to determine whether ultra-dry storage improves the longevity of vegetable seeds. Seeds of asparagus bean (Vigna unguiculata), cauliflower (Brassica oleracea), Chinese cabbage (Brassica pekinensis and B. chinensis), Chinese chive (Allium tuberosum), cucumber (Cucumis sativus), oriental sweet melon (Cucumis melo var. Makuwa Makino), radish (Raphanus sativus) and tomato (Lycopersicon esculentum) were dried from water contents ranging from 12-5% (depending on species) to about 1.5%, and stored at 40 and 20 degrees C for 52 months. Three different drying strategies were used: drying over silica gel, in a freeze-drier and in an oven at 50 degrees C. While comparable water contents were achieved using all methods, it took only 2 days to dry seeds to about 1.5% using the freeze- and heat-drying methods, and about 3 weeks using silica gel as a desiccant. After 52 months of storage, significant deterioration was observed in all samples stored at 40 degrees C. At this temperature, an optimum water content for storage was observed at about 2-3% water in most species, except for asparagus bean which had an optimum at about 6%, and Chinese chive which showed no evidence of an optimum. Some deterioration occurred in seeds stored at 20 degrees C and it was most apparent at the highest water contents. From these results, we conclude that drying seeds enhances longevity regardless of the drying method as long as seeds are not over-dried.