Background : This study was carried out to survey the effect of IBA (indole-3-butric acid) concentration on root development characteristics in Viburnum dilatatum cuttings. Methods and Results : The cuttings were collected on July 28, 2016 from plants growing in Korea National Arboretum. Cuttings were treated with different IBA concentrations [0 (control), 10, 100, 1000, 2000 ㎎⋅L-¹] for 10 seconds. Rooting parameters (root number, the longest root length, root fresh weight, root dry weight, rooting percentage, and survival rate) were observed at 8 weeks after cuttings. Rooting percentage was 43, 33, 17, 47, and 40 % at 0, 10, 100, 1000, and 2000 ㎎⋅L-¹ of IBA, respectively. Root number (13.4) was highest under 1000 ㎎⋅L-¹ IBA. Root length (9.4 ㎝) and Root weight (fresh and dry) were highest under 1000 ㎎⋅L-¹ IBA. Conclusion : According to the results, 1000 ㎎⋅L-¹ IBA was the best treatment for increasing percentage rooting percentage and other root development characteristics of V. dilatatum cuttings.

• Kyu Seong Choi(Useful Plant Resources Center, Korea National Arboretum of Korea Forest Service Department of Environmental Design, Konkuk University) | 최규성
• Do Hyun Kim(Useful Plant Resources Center, Korea National Arboretum of Korea Forest Service) | 김도현
• Chung Ho Ko(Useful Plant Resources Center, Korea National Arboretum of Korea Forest Service) | 고충호
• Han Choi(Useful Plant Resources Center, Korea National Arboretum of Korea Forest Service) | 최한
• Sun Hee Ryu(Useful Plant Resources Center, Korea National Arboretum of Korea Forest Service) | 류선희
• Sun Hee Ryu(Useful Plant Resources Center, Korea National Arboretum of Korea Forest Service) | 이승연
• Jeong Ho Lee(Useful Plant Resources Center, Korea National Arboretum of Korea Forest Service) | 이정호
• Ki Cheol Lee(Useful Plant Resources Center, Korea National Arboretum of Korea Forest Service) | 이기철 Corresponding author