온도 및 지베렐린 처리가 말오줌나무 종자의 배발달 및 발아에 미치는 영향|RISS 상세보기

다국어 초록 (Multilingual Abstract)

This study was conducted to determine types of seed dormancy in Sambucus racemosa subsp. pendula (Nakai) H.I. Lim & C.S. Chang, an endemic tree species of Korea, whose seeds have been considered difficult to germinate. Seeds of S. racemosa subsp. pendula were stratified at 25/15 or 5℃ for 0, 6, or 12 weeks (wks) and incubated at 15/6, 20/10, 25/15, or 30/20℃ (12/12 h) under 14 h photoperiod. To determine the effect of GA3 on seed germination of S. racemosa subsp. pendula, seeds were treated with 0, 500, or 1000 ppm GA3 and then germinated at 25/15 or 5℃. The change in embryo length was investigated at 25/15 or 5℃. Seeds given 12 wks of cold stratification germinated to 33.4% at 15/6℃ and to 25.4% for seeds given 6 wks of warm stratification + 12 wks of cold stratification at 20/10℃. At 25/15℃, seeds given 12 wks of warm stratification + 6 wks of cold stratification germinated to 26.0%, and to 28.2% for seeds given 12 wks of warm stratification + 12 wks of cold stratification at 30/20℃. Warm stratification alone did not germinate seeds throughout the experiment, regardless of the thermoperiod. Linear embryos began to grow after 60 days of incubation at 25/15 or 5℃. The embryo length at day 69 increased from 1.4 mm to 1.50 or 1.62 mm at 25/15 or 5℃, respectively. Embryos of S. racemosa subsp. pendula seeds grew better at 5℃ than at 25/15℃. Gibberellin was effective to break seed dormancy of S. racemosa subsp. pendula. Seeds treated with 500 ppm GA3 germinated up to 40.0% at 25/15℃ and to 62.7% for those treated with 100 ppm GA3 at 5℃. With these results, seeds of S. racemosa subsp. pendula have both nondeep complex and intermediate complex morphophysiological dormancy.

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참고문헌 (Reference)

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