層積處理對薯豆種子休眠和發芽之影響

Effects of Stratification on the Dormancy and Germination of Elaeocarpus japonicus Sieb. & Zucc. Seeds

楊正釧(Jeng-Chuann Yang) ； 陳裕星(Yu-Hsin Chen) ； 林讚標(Tsan-Piao Lin)

《台灣林業科學》 16卷1期 (2001/03) Pp. 47-52

https://doi.org/10.7075/TJFS.200103.0047

摘要

採後即播的薯豆種子需甚長發芽期且發芽零散。本文旨在探討其種子休眠程度，並尋求有效解除休眠及促進發芽的方法。採自台北縣石碇鄉的薯豆種子，經16週發芽期僅有1.0%之發芽率，且尚有大量種子並未腐敗，足見其具一定程度之休眠。以4℃層積打破種子休眠所需之最短時間為4個月（發芽率40.7±3.1%），而組合層積需時最短者為5個月（20/30℃層積2個月再入4℃層積3個月，發芽率40.1±4.2%）。另以15% H2O2浸泡30分鐘及75%酒精浸泡30秒鐘之藥劑處理後再進行低溫或組合層積，其解除種子休眠效果均遜於控制組（未經藥劑處理者）。

關鍵字

薯豆 ； 種子休眠 ； 層積 ； 暖低溫層積 ； 發芽

並列摘要

Fresh seeds of Elaeocarpus japonicus usually reguire a long time to germinate, and the emergence is irregular without appropriate pretreatment. This paper investigates the depth and the breaking of seed dormancy; the improvement of germination of this species by stratification is also discussed. Seeds of E. japonicus collected in Hsihding Village of Taipei County germinated poorly (1.0%) after incubation for 16 wk at alternating temperatures of 30/20℃; these seeds remained dormant and most seeds were not decayed. The shortest stratification period needed for breaking dormancy was chilling at 4℃ for 4 mo (germination percentage 40.7±3.1%) or combined stratification for 5 mo (2 mo of 30/20℃ followed by 3 mo of 4℃ stratification, germination percentage 40.1±4.2%). Chemical treatments (soaking seeds in 15% H2O2 for 30min or in 75% ethanol for 30s) before stratification were not more effective than the control in breaking seed dormancy.

並列關鍵字

Elaeocarpus japonicus ； seed dormancy ； chilling ； warm and cold stratification ； germination