본연구는산수국의종자번식에관한기초자료를얻고자수행하였다. 종자를 11월 15일, 12 월 30일, 그리고 1월 23일채취하여파종한결과최종발아율이각각 90.0±4.16%, 84.4±5.52%, 그리고 88.9±2.40%로휴면성이없는것으로판단되었다. 광, 온도조건에따른 발아실험결과최적의발아조건은온도는 25 C이고, 광은명조건으로판단되었다. 초장, 엽장, 줄기직경, 근장, 근수, 생체중, 건물중, T/R율공히 25/20 C의주야 변온조건에서가장크거나많았으나 25 C 항온조건과 큰차이를보이진않았다. 15C와 20 C의비교적저온에서생육이억제되었는데, 특히 T/R 율이낮아지상부의생육이더억제된것으로판단되었다. 적색광은유묘의초장과절간장의신장을촉진시켰다. 청색광처리구에서총엽록소, 엽록소 a/b 및카로티노이드함량이가장높게나타났고적색+청색광조합처리가그다음으로높아청색광이포함된광질처리에서함량이더높게나타났다. 플러그셀수(50, 72, 128, 162, 200cell) 에따른유묘의생육실험결과지상부의생육은50공트레이에서가장좋았고다음으로 72, 128공순이었으며 162 공과 200공간에는유의적인경향이일정하지않았다. 대체로셀의부피가큰(재식밀도가낮은) 트레이에서자란유묘의잎이컸다.
This work aims to obtain basic information for seed propagation of Hydrangea serrata for. acuminata. The germination percentage of the seeds taken on 15 November, 30 December, and 23 January was 90.0±4.16%, 84.4±5.52%, and 88.9±2.40%, respectively. This suggest that seeds of Hydrangea serrata for. acuminata are non-dormant seeds. The optimum temperature for germination was 25 o(or)and light was nec-essary. Most of the growth parameters (shoot and leaf length, stem diameter, root length, no. of roots, T/R o ratio, and fresh and dry wts.) were significantly greater at 25/20 C and 25 o(ot)than at the other temperatures. o Low T/R ratio at relatively cool temperatures (15 and 20 C) was caused by suppressed top growth. In light quality treatment, red light (RL) significantly enhanced stem elongation. The greatest photosynthetic pig-ments (total chl, chl a/b, and carotenoid) were observed in seedlings grown in blue light (BL), followed by seedlings grown in RL+BL. When blue light was added, higher pigment contents were found. Effect of plug cell size (50, 72, 128, 162 and 200 cells) on the growth of seedlings was investigated. The highest top growth was observed in seedlings grown in 50 cell trays, followed by seedlings grown in 72, 128, 162, and 200 cell trays. However, there was no significant differences between 162 and 200 cell trays. Especially, smaller size leaves were observed in seedlings grown in smaller cell trays (lower volume and high plant density).