長葉木薑子種子成熟度影響種子的儲藏能力

Effect of Seed Maturity on Storability of Litsea acuminata Seeds

簡慶德(Ching-Te Chien) ； 楊佳如(Ja-Ju Yang)

《台灣林業科學》 12卷3期 (1997/09) Pp. 369-372

https://doi.org/10.7075/TJFS.199709.0369

摘要

本文旨在探討不同時期採收的長葉木薑子種子在不同水苔含水率處理下進行低溫儲藏，以研究種子的儲藏能力。實驗結果顯示提早二星期採收的種子較之成熟種子不耐儲藏。以福山地區為例，提早採收的種子在5℃儲藏3個月後平均發芽率從86%迅速降至15%左右，而成熟種子經12個月儲藏後，平均發芽率仍維持在70%。蓮華池地區採的種子在同樣儲藏條件下能維持較高的種子活力，其提早採收的種子在儲藏3個月後發芽率降至60%，7個月後才降至30%，而成熟種子12個月後仍維持在80%發芽率。種子經混合處理各種不同水苔含水率後儲藏，其處理間之種子儲藏活力並無顯著差異。長葉木薑子種子在室內氣乾72小時後，發芽率從98%降至24%，且種子含水率與發芽率之間成正相關，屬於異儲型的儲藏行為。

關鍵字

長葉木薑子 ； 種子成熟度 ； 異儲型 ； 水苔含水率 ； 種子含水率

並列摘要

This study examined the storability of Litsea acuminata seeds which were harvested at different dates and stored at 5℃ in sphagnum with different moisture contents. It was shown that seeds collected 2 weeks before maturity stored less well than did mature seeds. The germination percentages of maturing seeds from Fu-shan region stored at 5°C for 3 months rapidly declined from 86% to 15%, but mature seeds maintained 70% germination after 12 months in the same storage condition. By contrast, seeds from the Lien-hua-chi region exhibited better storability. The germination of maturing seeds decreased to 60% over 3 months and to 30% over 7 months at 5℃ storage, but mature seeds maintained 80% germination for 12 months. Seeds stored in sphagnum with different moisture contents showed no significant differences in storability among treatments. When air dried for 72 hours, germination percentages of L. acuminata seeds decreased from 98% to 24%, and the linear relationship between germination percentage and seed moisture content shows that the lower the moisture content, the greater the damage to seeds. The seeds can thus be described as recalcitrant in their storage behaviour.

並列關鍵字

Litsea acuminate ； seed maturity ； recalcitrant type ； moisture content of sphagnum ； moisture content of seed