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Effects of Several Pre-treatments on Seed Germination or Sophora japonica L.  

Tak, Woo-Sik (Department of Forest Genetic Resources, Korea Forest Research Institute)
Kim, Tae-Su (Forest Seed Research Center, Korea Forest Research Institute)
Choi, Chung-Ho (Department of Forest Genetic Resources, Korea Forest Research Institute)
Publication Information
Korean Journal of Plant Resources / v.19, no.5, 2006 , pp. 580-585 More about this Journal
Abstract
This experiment was conducted to study the effects of sulphuric acid, cutting, cold stratification and hot water on the germination of Sophora japonica seeds, which have difficulty to germinate because they have hard and thick seed coats. The seeds were immersed in 30, 60 and 90% sulphuric acid for 30 minutes as seed scarifications, and cut 1/8, 2/8 and 3/8 of the opposite parts of radicles. As cold stratification the seeds were wrapped in wet towel, and then stored in plastic bags in a refrigerator $(4^{\circ}C)$ for 3, 5 and 10 days. The seeds were immersed in hot water $(90{\sim}95^{\circ}C)$ for 2,5 and 10 minutes. Pretreated seeds represented different germination properties, respectively. After sulphuric acid treatment, the seeds showed an increase in germination (G) and germination index (GI). Compared to the other treatments, 90% sulphuric acid showed the highest G (31.7%) and GI (6.2). The G and GI of cut seeds decreased with the increase of seed cutting lengths. And G and GI of cold stratificated seeds were not significantly different among the days treated (p=0.258). Two minutes treatment of hot water showed lower G and Gl than control, and the seeds were not germinated in 5 and 10 minutes treatments of hot water. At the result of relative growth rate and T/R ratio of seedlings from pretreated seeds, the seedlings from seeds in 90% sulphuric acid treatment represented the highest relative growth rate and T/R ratio.
Keywords
Sophora japonica; Germination; Germination index; Pretreatment;
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