Optimal Light Intensity and Photoperiod for Plug Seedling Production of Ballon Flower (Platycodon grandiflorum) in a Closed-type Plant Production System

Jeong Hun Hwang; Eun Won Park; Hee Sung Hwang; Jeong Kil Koo; Hyeong Eun Choi; Ji Hye Yun; Seung Jae Hwang

doi:10.12791/KSBEC.2025.34.2.181

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2025 Vol.34, Issue 2 Preview Page Next Page

Original Articles

Optimal Light Intensity and Photoperiod for Plug Seedling Production of Ballon Flower (Platycodon grandiflorum) in a Closed-type Plant Production System 도라지 공정 육묘를 위한 폐쇄형 식물 생산 시스템 내 최적 광도와 광주기

30 April 2025. pp. 181-187

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Abstract

Platycodon grandiflorum is a medicinal plant primarily cultivated in Korea, China, and Japan. The roots of Platycodon grandiflorum are high in saponins. This making them effective for protecting the respiratory system, which is why they are extensively used as medicinal materials, as well as in processed food and cosmetics. However, a proper lighting environment for the large-scale production of Platycodon grandiflorum in a closed-type plant production system (CPPS) has not been established. Therefore, this study was conducted to elucidate the optimal light intensity and photoperiod for Platycodon grandiflorum. The seedlings were cultivated in a walk-in chamber at 24.9 ± 0.9°C temperature and 53.7 ± 10.9% relative humidity for 48 days. Light intensities of 100, 150, and 200 ± 10 µmol·m^-2·s^-1 were used, along with photoperiods of 10/14, 12/12, and 14/10 h (light/dark). The highest growth of the shoot was observed at the highest light intensity of 200 µmol·m^-2·s^-1, showing no significant differences between the photoperiods of 12/12 and 14/10 h. In 200 µmol·m^-2·s^-1, the internode length at photoperiod of 12/12 h was significantly shorter compared to the photoperiod of 14/10 h. In 200 μmol·m^-2·s^-1, the root characteristics showed enhanced growth at photoperiod of 14/10 h compared to photoperiod of 12/12 h. In conclusion, a light environment of 200 µmol·m^-2·s^-1 with a photoperiod of 12/12 h is deemed suitable for the plug seedling production for seedling of Platycodon grandiflorum.

Keywords

compactness

internode length

total root length

walk-in chamber

도라지는 한국, 중국 그리고 일본에서 주로 재배되는 약용작물이다. 도라지의 뿌리는 사포닌의 함량이 높고 기관지 보호에 효과가 좋아 약재로 이용이 많이 될 뿐만 아니라 가공식품, 화장품의 원료로 많이 이용되고 있다. 하지만 도라지의 대량 생산을 위한 폐쇄형 식물 생산 시스템 내 적정 광 환경에 대한 기초 데이터가 전무한 실정이다. 본 연구는 도라지의 광도와 광주기를 구명하기 위해 수행되었다. 도라지는 온도 24.9 ± 0.9℃, 상대습도 53.7 ± 10.9%의 폐쇄형 식물 생산 시스템에서 48일간 육묘하였다. 광도는 100, 150 및 200 ± 10µmol·m^-2·s^-1그리고 광주기는 10/14, 12/12, 14/10h(명기/암기)로 처리하였다. 가장 높은 광도인 200µmol·m^-2·s^-1에서 지상부 생육이 가장 우수하였고 12/12와 14/10h 사이에는 유의적인 차이가 나타나지 않았다. 200µmol·m^-2·s^-1에서 광주기 12/12h의 절간장은 14/10h보다 유의적으로 짧았다. 200µmol·m^-2·s^-1에서 지하부 생육의 경우 광주기 12/12h보다 14/10h의 생육이 우수하였다. 결론적으로, 200µmol·m^-2·s^-1, 12/12h는 도라지 공정 육묘의 광 환경으로 적합할 것으로 판단된다.

키워드

워크인 챔버

절간장

총 뿌리 길이

충실도

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Information

Publisher :The Korean Society for Bio-Environment Control
Publisher(Ko) :(사)한국생물환경조절학회
Journal Title :Journal of Bio-Environment Control
Journal Title(Ko) :생물환경조절학회지
Volume : 34
No :2
Pages :181-187
Received Date : 2025-04-21
Accepted Date : 2025-04-23
DOI :https://doi.org/10.12791/KSBEC.2025.34.2.181

Journal of Bio-Environment Control ISSN:1229-4675(Print) 2765-3641(Online) 생물환경조절학회지

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