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低溫과 水分포텐셜이 紫雲英 蒐集種의 發芽와 苗伸長에 미치는 影響
Rak Chun Seong(成樂春),Keun Yong Park(朴根龍),Jae Yeung Cho(趙載英) 한국육종학회 1990 한국육종학회지 Vol.22 No.3
Germination and seedling growth of local collected chinese milkvetch (Astragalus sinicus L.) cultivars were measured at three temperatures (5, 10 and 15℃) and four polyethylene glycol(PEG) 10,000(MW) solutions(0, 10, 20 and 25g/100㎖ H₂O). Adjustments of PEG 10,000 solutions were based on water potentials of 0.0, -0.2, -0.5 and -0.8 MPa at room temperature. Observations were taken at 5, 7, 9 and 11 days for treatments at 15℃, 7, 11, 15 and 19 days for those at 10℃, and 9, 15, 21 and 27 days at 5℃. Germination rate of cultivar A of chinese milkvetch was higher than that of cultivars B at three temperatures and four PEG treatments. However, cultivar B showed greater seedling length than cultivar A at the temperatures and PEG treatments. The highest germination rate and seedling length of both cultivars were appeared at temperature of 10℃ among three temperatures. Germination rate and seedling length of both cultivars were reduced as PEG concentration increased from PEG 10 to 25g/100㎖ water. With concentration of PEG 20 and 25g/100㎖ water, germination rate and seedling length of both cultivars were the highest at 101C. Germination rate and seedling length of both cultivars of the cultivars was increased as temperature increased. The result of this study indicated that germination of chinese milkvetch seeds was affected more by moisture stress conditions than by low temperatures and required more moisture for adequate germination and seedling growth.