蘭嶼木薑子、毛柿與蘭嶼肉豆蔻種子的發芽與儲藏性質

Germination and Storage Behavior of Seeds of Litsea Garciae, Diospyros Philippensis, and Myristica Ceylanica Var. Cagayanensis

楊正釧(Jeng-Chuann Yang) ； 郭幸榮(Shing-Rong Kuo) ； 李瓊美(Chiung-Mei Lee)

《中華林學季刊》 41卷3期 (2008/09) Pp. 309-321

https://doi.org/10.30064/QJCF.200809.0002

摘要

本研究以種子含水率與儲藏溫度對發芽率之影響來探討3種台灣原生海岸林樹種種子的休眠性質與儲藏行為。結果顯示蘭嶼木薑子、毛柿及蘭嶼肉豆蔻等種子均不具休眠性，以30/20℃變溫經2~4週後就幾能發芽完畢。此三種大型種子非常不耐乾燥，且無法在4℃以下之低溫存活，當種子含水率分別乾燥至33.6%、32.0%與27.0%時則完全喪失活力，且新鮮種子在4℃以水草濕藏時壽命之維持分別不超過30、28與7日，故判斷此三種種子均屬熱帶異儲型。依據上述結果，建議此類不具休眠的熱帶異儲型種子不應儲藏，洗淨後應即播。

關鍵字

毛柿 ； 蘭嶼木薑子 ； 蘭嶼肉豆蔻 ； 種子儲藏行為 ； 熱帶異儲型

並列摘要

We investigated the effects of seed moisture content and storage temperature on seed germination. Seed dormancy and storage behavior of three coastal forest species, native to Taiwan, were also examined. We found seeds of Litsea garciae, Diospyros philippensis, and Myristica ceylanica var. cagayanensis did not have dormancy and most of them were able to germinate completely within 2~4 weeks under alternating temperatures of 30/20℃ with 8 hours of light. In addition, freshly mature seeds of L. garciae, D. philippensis, and M. ceylanica var. cagayanensis were similar to other large-size seed species. They were extremely sensitive to desiccation and would lose their viability as temperature below 4℃. They totally lost viability as dried to moisture contents of 33.6%, 32.0%, and 27.0% (on FW basis), respectively. When stored at 4℃ with moist sphagnum, the maximum longevity of these three species was 30, 28 and 7 days, respectively. The seeds of these three species were confirmed as exhibiting tropical recalcitrant storage behavior in our study. Based on above findings, we suggest that these tropical recalcitrant seeds should be sowed immediately instead of stored after depulped.

並列關鍵字

Diospyros philippensis ； Litsea garciae ； Myristica ceylanica var. cagayanensis ； Seed storage behavior ； Tropical recalcitrant