한국 특산식물 좀비비추(Hosta minor)의 실내 이용을 위해 저광 조건(10, 30, 50μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP>; L10, L30, L50)에서 3개월간 생장 반응과 광 생리 특성을 조사하였다. 잎과 지상부, 분얼 생장 모두 초기생장(0주차)과 비교하여 L10에서는 증가 없이 오히려 감소하였고(20-50%), L30에서는 유지되거나 약간 증가하였으며(10-50%), L50에서는 200-300% 수준으로 현저하게 늘어났다. 처리기간 동안 건물 증가율은 L10, L30, L50에서 -20%, 10%, 90%, 광이용효율 역시 -0.12, 0.04, 0.16으로 나타났다. 순광합성량은 4주차 때는 초기값(0주차)보다 오히려 감소하였으나, 9주차 이후 증가하며 처리간 유의한 차이를 보였다. 평균 광보상점은 17 ± 6.16μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP>, 광포화점은 200-350μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP>로 측정되었다. 광도와 관계없이 모든 처리구 F<SUB>v</SUB>/F<SUB>m</SUB> 값은 0.79-0.83으로 정상 수준을 나타냈고, OJIP 곡선 역시 큰 차이를 보이지 않았다. 이상에서 10μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP> 저광도 조건은 광계Ⅱ 손상을 가져오지는 않았으나, 생장을 억제시키는 비생물적 스트레스 요인으로 작동하였다. 결론적으로 좀비비추의 실내 이용을 위해서는 4주간의 적응이 필요하며, 한계 광도는 10-30μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP>로 판단된다.
To check the availability of indoor plants, we investigated the growth and photo-physiological responses in Korean endemic Hosta minor for three months of artificial low light conditions (10, 30, and 50 μmol·m<SUP>-2</SUP>··s<SUP>-1</SUP>, abbreviated as L10, L30, and L50). In the L10 treatment, the growth indicators leaf number and size, shoot biomass, and tillering capacity declined by 20-50% decline from the initial values, and those were maintained or slightly increased in the L30 treatment and significantly increased to 200-300% in the L50 treatment. The light use efficiency values supported this result, which were -0.12, 0.04, and 0.16 in L10, L30, and L50, respectively. Growth adaptation to the indoor artificial lighting took four to six weeks. Net photosynthesis also decreased from the initial value after four weeks but increased in the ninth week, showing significant differences among the different light intensity levels. The light compensation point was 17 ± 6.16 μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP>, and the light saturation point ranged from 200 to 350 μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP>. Regardless of the light intensity, the F<SUB>v</SUB>/F<SUB>m</SUB> values were 0.79 to 0.83, indicating a normal level, and the OJIP curve also showed no significant difference. These results indicate that the low light intensity of 10 μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP> did not damage photosystem II but gradually negatively affected the growth of Hosta minor. We concluded that the minimum light intensity is 10 to 30 μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP> in Hosta minor and requires four weeks of low light adaptation.