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2025 Vol.34, Issue 2

Original Articles

Evaluation of Growth, Photosynthetic Pigment, and Nursery Period of Korean Angelica (Angelica gigas Nakai) Plug Seedlings under Elevated CO2 Conditions

고농도 CO2 조건에서 참당귀 플러그 묘의 생육, 광합성 색소 및 육묘기간 평가

Eun Won Park1
,
Jeong Kil Koo1
,
Hyeong Eun Choi1
,
Hee Sung Hwang24
,
Ji Hye Yun1
,
So Yeong Hwang1
,
Min Su Jeon3
,
Seung Jae Hwang567*
박 은원1
,
구 정길1
,
최 형은1
,
황 희성24
,
윤 지혜1
,
황 소영1
,
전 민수3
,
황 승재567*
1Graduate Student, Division of Applied Life Science, Graduate School of Gyeongsang National University, Jinju 52828, Korea
2Graduate Student, Division of Crop Science, Graduate School of Gyeongsang National University, Jinju 52828, Korea
3Undergraduate student, Division of Horticultural Science, Gyeongsang National University, Jinju 52828, Korea
4Researcher, Institute of Agriculture & Life Sciences, Gyeongsang National University, Jinju 52828, Korea
5Professor, Institute of Agriculture & Life Sciences, Gyeongsang National University, Jinju 52828, Korea
6Professor, Division of Horticultural Science, College of Agriculture & Life Sciences, Gyeongsang National University, Jinju 52828, Korea
7Professor, Research Institute of Life Science, Gyeongsang National University, Jinju 52828, Korea
1경상국립대학교 응용생명과학부 대학원생
2경상국립대학교 작물생산과학부 대학원생
3경상국립대학교 원예과학부 학부생
4경상국립대학교 농업생명과학연구원 연구원
5경상국립대학교 농업생명과학연구원 교수
6경상국립대학교 원예과학부 교수
7경상국립대학교 생명과학연구원 교수
*Corresponding Author
30 April 2025. pp. 133-141
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Abstract

This study aimed to evaluate the shoot and root growth, changes in photosynthetic pigments, and nursery period of Korean angelica plug seedlings under different CO2 concentrations in plant factories with artificial lighting systems (PFALs). Korean angelica seeds were sown in 72-cell plug trays, and the seedlings were grown for 40, 50, and 60 days to evaluate their morphological characteristics and chlorophyll contents. The internal CO2 concentrations in PFALs were set at three levels: ambient (475 ± 40 µmol·mol-1), ‘high concentration’ (‘HC’, 758 ± 29 µmol·mol-1), and ‘very high concentration’ (‘VHC’, 1,197 ± 37 µmol·mol-1). CO2 supply started 20 days after sowing when cotyledons were fully extended, and the first true leaf was observed. As a result, from 50 days after sowing, the crown diameter, leaf area, root development, and dry weight were higher in HC and VHC than in ambient, indicating a faster growth speed. However, there was statistically no significant difference in the dry matter accumulation between HC and VHC. From a morphological point, VHC had the longest petioles and the widest leaf area at 60 days after sowing, and the canopy expanded horizontally. The chlorophyll a, b, and total chlorophyll content were also the lowest. Additionally, the leaf area index was higher compared to the ambient, and the specific leaf weight, which indicates leaf thickness, was reduced. This is thought to be because the growth speed is fast, resulting in competition between individuals within the narrow plug tray environment. Therefore, the appropriate CO2 concentration for shortening the nursery period of Korean angelica is considered to be approximately 800 µmol·mol-1 and the appropriate nursery period in 800 µmol·mol-1 condition is 50 days.

Keywords
chlorophyll
leaf area index
root ball formation
root diameter
specific leaf weight

본 연구는 육묘기간과 PFAL 내 CO2 농도에 따른 참당귀의 지상부 및 지하부 생육, 광합성 색소 변화, 육묘기간을 평가하는 것을 목적으로 하였다. 참당귀 종자는 72구 트레이에 파종하였고 파종 후 40, 50, 및 60일차에 참당귀 묘의 형태학적 특징과 엽록소 함량을 조사하였다. PFAL 내 온도는 22/19℃ (주간/야간)으로 유지되었고 광주기는 12시간이었다. CO2 농도는 ambient (475 ± 40μmol∙mol-1), ‘high concentration’ (‘HC’, 758 ± 29μmol∙mol-1), 그리고 ‘very high concentration’ (‘VHC’, 1,197 ± 37μmol∙mol-1) 세 가지 수준으로 설정되었다. CO2 공급은 자엽이 완전히 전개되고 본엽이 관측되는 파종 후 20일차에 시작되었다. 파종 후 50일차부터 관부직경, 엽면적, 뿌리발달, 그리고 건물중이 ambient에 비해 HC와 VHC에서 높았으며 이는 생육속도가 빨랐음을 의미한다. 하지만 HC와 VHC 간에 건물중은 통계적으로 유의한 차이가 없었다. 형태학적 관점에서 VHC는 파종 후 60일차에 엽병장이 길고 엽면적이 넓어져 수평적 캐노피 확장이 이루어졌으며, 생리적으로는 총 엽록소 함량이 감소하였다. 또한 ambient에 비해 엽면적 지수가 높고 잎의 두께를 나타내는 지표인 비엽중이 감소하였다. 이는 생장속도가 빨라져 협소한 플러그 트레이 환경 내에서 개체 간 경쟁이 이루어진 결과로 판단된다. 따라서 참당귀의 육묘기간을 단축시키기 위한 적정 CO2 농도는 약 800μmol∙mol-1로 판단되며, 적정 육묘기간은 50일로 사료된다.

키워드
비엽중
뿌리돌림
뿌리직경
엽록소
엽면적지수
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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 :133-141
  • Received Date : 2025-02-07
  • Revised Date : 2025-02-20
  • Accepted Date : 2025-02-24
  • DOI :https://doi.org/10.12791/KSBEC.2025.34.2.133
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