獨活種子의 休眠과 發芽特性

Dormancy and seed germination characteristics in aralia continentalis Kitagawa

Effective mass propagation of Aralia continentalis could be achieved through the understanding of seed germination chracteristics. The present study was undertaken to find out germination conditions and to know the factors related to germination. The seeds used in this study were harvested on Nov. 7, 1990. The results obtained were:(1) In germination test of some medicinal plant seeds, germination rate of Aralia continentalis seed(less than 4%) was extremely low. (2) Germination of Aralia continentalis seed was induced up to 80.5% and 74.5% by stratification for 45 days and GA₃ 500mg/l application for 5 days, respectively. At that time, the optimum condition for germination was 19/15℃(day/night) and 16 hours light condition. (3) In germination test during the periods from Nov. 7, 1990 to Apr. 21 in 1991, germination was much promoted by stratification and GA₃ application as duration of treatment was prolonged regardless of temperatures. Germinating speed and germination rate based on the 10th day and the days to 70% germination were increased until 75 days before reached to a maximum. (4) Germination rates of seeds stored under dry condition for 30 to 45 days were 40 to 60%, but in other periods were less than 20%. (5) In field germination experiment with different sowing dates, the highest emergence was observed when seeds were sown at Nov. 7, and seeds sown after this date hardly emerged.