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題名 | 含水率與溫度對流蘇種子儲藏性質之影響=Effects of Seed Moisture Content and Storage Temperature on the Storage Behavior of Seeds of the Chinese Fringetree (Chionanthus retusus Lindl. & Paxt.) |
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作者 | 楊正釧; 林讚標; Yang, Jeng-chuann; Lin, Tsan-piao; |
期刊 | 臺灣林業科學 |
出版日期 | 20040900 |
卷期 | 19:3 2004.09[民93.09] |
頁次 | 頁247-258 |
分類號 | 436.251 |
語文 | chi |
關鍵詞 | 流蘇; 種子儲藏性質; 乾儲型; 層積處理; Chinese fringetree; Chionanthus retusus; Orthodox; Seed storage behavior; Chilling; |
中文摘要 | 本文以不同的種子含水率與不同的溫度探討流蘇種子的儲藏性質。結果顯示將流蘇種子含水率降低至4.8% (鮮重)儲藏於-20℃時,經24 mo後其發芽率並無下降,故判定屬乾儲型。以-20℃進行長期儲藏時最適當的種子含水率在5%左右。另於4與15℃儲藏時,含水率5-15%之種子在2 yr內其發芽率並不會顯著下降。4℃層積僅稍能提高發根率,但使平均發芽日數顯著延長;而經4與15℃乾藏3-24 mo之種子其平均發芽日數亦顯著延長,而且此效應於含水率愈高的種子愈顯著;故低溫層積與低溫乾藏均會誘導胚根休眠。種子具乾燥後熟作用,將新鮮種子乾燥至含水率20%以下時,能有效提高發芽率及發芽速度。種子發芽時溫度不宜低於20℃,以20/30℃變溫能有效促使種子發根。基於上述結果,本文並對流蘇的果實採集、種子處理、儲藏及解除休眠等提出討論。 |
英文摘要 | The effects of moisture content a increased nd temperature on the storage behavior of Chinese fringetree (Chionanthus retusus Lindl. & Paxt.) seeds were investigated. Seed germinability could be maintained at -20℃ for at least 24 mo at a moisture content of 4.8% (on a fresh-weight basis), therefore, confirming the orthodox seed storage behavior. The optimum moisture content for long-term seed storage at -20℃ was about 5%. Seeds of the Chinese fringetree were also characterized by very low deterioration rates if the moisture content was maintained at between 5 and 15% at either 4 or 15℃ in 2 yr of storage. Chilling treatment at 4℃ had little beneficial effect on the emergence of the radicle, and reduction in the mean germination times significantly increased. The mean germination times of seeds significantly increased in a period of 3 and 24 mo of dry storage at either 4 or 15℃, especially in the case with a high water content. It was concluded that chilling and cold dry storage induced seed dormancy. After-ripening occurred when fresh mature seeds were dehydrated to 20% moisture content. Emergence of the radicle, however, could be promoted by incubating the seeds at alternating temperatures of 20/30℃ but not under a constant temperature of 20℃. In this article, the practice of fruit collection, seed treatment, seed storage, and seed dormancy breaking of the Chinese fringetree are discussed. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。