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題 名 | 燈稱花種子休眠與發芽=Seed Dormancy and Germination of Ilex asprella |
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作 者 | 楊颺; 陳舜英; 楊國禎; 簡慶德; | 書刊名 | 中華林學季刊 |
卷 期 | 47:2 2014.06[民103.06] |
頁 次 | 頁121-135 |
分類號 | 436.252 |
關鍵詞 | 低溫層積; 激勃素; 燈稱花; 形態生理休眠; 種子發芽; 發育未完全胚; Cold stratification; Gibberellins; Ilex asprella; Morphophysiological dormancy; Seed germination; Underdeveloped embryo; |
語 文 | 中文(Chinese) |
中文摘要 | 燈稱花為臺灣原生種冬青科落葉灌木,其種子具休眠性。本文旨在探討燈稱花種子發芽促進方法與休眠性。將採自陽明山、楊梅及來義三處燈稱花天然族群的種子,進行發芽試驗,包含各種不同的溫度處理、連續溫度變化處理、低溫5℃層積處理及不同濃度之激勃素GA_3和GA_4處理,並調查種子胚發育生長。試驗結果顯示,最終發芽率在不同採集地及不同發芽溫度下有顯著差異,但發芽率皆以20/10℃處理最高,然需要12週後才開始發芽。25-2500 μM激勃素GA_3及GA_4皆可促進種子發芽,採集自楊梅及來義的種子之最適GAs處理濃度分別為250及2500 μM。低溫5℃層積處理可加速燈稱花種子發芽,然仍需配合較低的發芽溫度,例如20/10℃。結論是燈稱花種子胚小,胚在種子內生長時間長達10週以上,且受到發芽溫度的影響,具淺度的形態生理休眠。建議秋天採收燈稱花種子後,應先以低溫層積儲藏,至翌年初春再播種。 |
英文摘要 | "Ilex asprella" whose seeds have dormancy is a native deciduous shrub in Taiwan. Germination promotion and dormancy characterization of "Ilex asprella" seeds were studied. Seeds from three sites, Yang Mei, Lai Yi, and Yang Ming Shan were collected and tested germination. Seeds treatments included different incubation temperatures, temperature sequence from-warmto- cold or from-cold-to-warm incubation, cold stratification at 5℃, and different cocentrations of GA_3 and GA_4. Embryo and seed length were investigated. We found that the suitable temperature for seed germination was at 20/10℃, and the final germination percentage and rate showed significance difference under different incubation temperatures and seed collection sites. Germination percentage of fresh seeds at 20/10℃ was the highest, but seeds required 12 weeks for beginning to germinate. Seeds treated with 25-2500 μM GA_3 and GA_4 promoted germination and the suitable GA concentrations to seeds of Yang-Mei and Lai-Yi were 250 and 2500 μM of GA_3 and GA_4, respectively. Cold stratification at 5℃ shortened germination time, but required combining low sowing temperature, e.g. 20/10℃. In conclusion, small embryo in seed of "Ilex asprella" was found and embryo growth in seed required greater than 10 weeks before seed germination. Thus, seeds of "Ilex asprella" have a nondeep morphophysiological dormancy. We suggest that seeds collected in autumn were pretreated by cold stratification until next early spring for sowing. |
本系統中英文摘要資訊取自各篇刊載內容。