In this study, we tried to overcome a limit in cutting timing of reed culm by applying a plant hormone, indole-acetic acid
(IAA) as a growth regulator with various contents (10-3 M, 10-6 M, 10-9 M, 10-12 M). 19 shoots emerged from 240 segments
of hardened reed culm from montane fen and eight out of the 19 shoots emerged by 10-6 M IAA treatment as the most in 5th
Sep. 2012. 50 shoots emerged from 60 segments of non-hardened reed culm from a population in Seoul National University
transplanted from Mt. Odae by 10-6 M IAA treatment despite the cutting was performed about two weeks later (19th Sep.).
Via third cutting experiment performed about 40 days later (29th Oct.), only two shoots out of 60 segments were observed by
the same experimental condition except atmospheric temperature. It seemed likely that it was too low temperature in third
experiment (10℃) than the former experiments (about 20℃) to form adventitious buds from culm segment. We recommend to
utilize the thick reed culm in culm cutting as possible because the thicker culm segment we used, the thicker emerged shoot
we could observe (i.e., diameters of emerged shoots were about 20% of the planted segment’s diameters).