破布子與朴樹種子的儲藏性質與發芽

Seed Storage Behavior and Germination of Fragrant Manjack (Cordia dichotoma G. Forst.) and Chinese Hackberry (Celtis sinensis Pers.)

楊正釧(Jeng-Chuann Yang) ； 郭幸榮(Shing-Rong Kuo) ； 林讚標(Tsan-Piao Lin)

《台灣林業科學》 21卷4期 (2006/12) Pp. 447-459

https://doi.org/10.7075/TJFS.200612.0447

摘要

本研究目的在明瞭破布子與朴樹種子的發芽特性並探討其儲藏性質。此二樹種具活力的新鮮種子於30/20℃變溫環境下6週內就可發芽完畢，平均發芽日數分別是15.6與11.8d，故此二批種子均不具休眠性。也因此，4℃層積處理僅能提升發芽速率。破布子種子會隨4℃層積時間之延長而逐漸衰敗，層積9mo後種子活力迅速下降，12mo後就死亡殆盡。而朴樹種子在4℃層積經4mo後會開始自行發芽，7mo後具有活力的種子就完全發芽。故低溫濕藏亦非此二種子短暫儲藏的可行方法。當破布子與朴樹種子的含水率分別降低至4.5~12.7與3.8%（鮮重），儲藏於-20和4℃經24mo後其發芽率並無顯著下降，故判定其種子儲藏性質均屬乾儲型。

關鍵字

破布子 ； 朴樹 ； 儲藏性質 ； 乾儲型 ； 層積

並列摘要

The storage behavior and germination characteristics of seeds of the fragrant manjack (Cordia dichotoma G. Forst.) and Chinese hackberry (Celtis sinensis Pers.) were investigated. Freshly mature viable seeds of these 2 species could completely germinate under alternating temperatures of 30/20℃ with 8h of light within 6wk. The mean germination times of their freshly mature seeds were 15.6 and 11.8d, respectively. Therefore, the seeds of these 2 species were shown to be nondormant. That is the reason why 4℃ chilling only had an effect on the rate of germination. The seeds of C. dichotoma deteriorated rapidly when the chilling period was extended to 9mo and died completely after 12 mo of being chilled. With a stratification period extended to longer than 4mo, seeds of C. sinensis forced seed germination under chilling conditions, and complete seed germination could be achieved when the chilling period was extended to 7mo. Thus, 4℃ stratification is not an appropriate way to store the seeds of these 2 species for the short term. Seed germinability could be maintained at -20 and 4℃, for at least 24mo at moisture contents of 4.5~12.7 and 3.8% (on a fresh-weight basis) for seeds of C. dichotoma and C. sinensis, respectively. This therefore confirms the orthodox seed storage behavior of these 2 species.

並列關鍵字

fragrant manjack Cordia dichotoma ； Chinese hackberry Celtis sinensis ； seed storage behavior ； orthodox ； stratification