香葉樹、大香葉樹、臺灣雅楠、紅葉樹與山龍眼種子的儲藏性質

Seed Storage Behavior of Lindera communis, Lindera megaphylla, Phoebe formosana, Helicia cochinchinensis, and Helicia formosana in Taiwan

簡慶德(Ching-Te Chien) ； 楊正釧(Jeng-Chuann Yang) ； 林讚標(Tsan-Piao Lin)

《台灣林業科學》 19卷2期 (2004/06) Pp. 119-131

https://doi.org/10.7075/TJFS.200406.0119

摘要

本文旨在探討樟科3樹種和山龍眼科2樹種種子的儲藏性質，同時調查低溫濕藏對保存種子活力之效應。香葉樹和大香葉樹新鮮種子含水率分別為50.2和33.5%，發芽率分別為38.5和100%，然後被乾燥至各種不同含水率，並儲藏在-20、4和15℃。當此2樹種種子含水率降至9-11%時，種子發芽率仍保持最初新鮮種子的75%或更高，然發芽率隨儲藏時間增加而降低，4℃儲藏3個月後的發芽率已降為最初的30%左右，6個月後種子已無活力。種子在15℃的儲藏效果沒有4℃佳，且種子完全無法儲藏-20℃。因此，香葉樹和大香葉樹種子能忍受部分乾燥，但無法忍受零下低溫儲藏，可歸類為中間型的儲藏性質，但因其有效的乾藏期間很短，與其他中間型種子相比較，仍可細分為中間偏濕儲型態。臺灣雅楠、紅葉樹和山龍眼等種子皆對乾燥敏感，歸類為濕儲型。本研究5樹種種子皆能在低溫4℃下層積濕藏，依樹種不同其活力保存6至24個月不等，且低溫濕藏能顯著地降低種子平均發芽天數，達到發芽迅速整齊的效果。

關鍵字

種子儲藏性質 ； 濕儲型 ； 中間型 ； 香葉樹 ； 大香葉樹 ； 臺灣雅楠 ； 紅葉樹 ； 山龍眼

並列摘要

Seed storage behavior of Lindera communis, L. megaphylla, and Phoebe formosana representing the Lauraceae, and Helicia cochinchinensis, and H. formosana representing the Proteaceae were studied. Effect of cold storage in moist sphagnum on retaining viability was also investigated for seeds of the 5 species. Seeds of the 5 species were dehydrated to various water contents, and stored at -20, 4, and 15℃ for 1 y. Water contents of freshly harvested L. communis and L. megaphylla seeds were 50.2 and 33.5%, and germination percentages were 38.5 and 100%, respectively. When seeds of the 2 species were dried to water contents of 9~11%, their viability was maintained at 75% or greater of the original germination percentages. However, the seed viability decreased with an increase in storage time. The germination percentage decreased to 30% of the initial germination under 4℃ storage for 3 months and decreased to nil at 6 months. Seeds stored at 15℃ were not as good as those at 4℃, and all of those stored at -20℃ were dead. Thus, the partial desiccation tolerance and freezing sensitivity of L. communis and L. megaphylla seeds are recognized as intermediate storage behavior After further comparison with other species of the intermediate type, we believe that their properties lie between the intermediate and recalcitrant types due to their shorter effective storage period. Seeds of P. formosana, H. cochinchinensis and H. formosana were sensitive to desiccation and are characterized as having recalcitrant storage behavior Seeds of the 5 species were capable of being stored for 6 to 24 months depending on species at moist-chilled temperature of 4℃ with moist sphagnum, and mean germination time also gradually shortened following storage time.

並列關鍵字

seed storage behavior ； recalcitrant type ； intermediate type ； Lindera communis ； Lindera megaphylla ； Phoebe formosana ； Helicia cochinchinensis ； Helicia formosana