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Increased Antioxidants of Agastache rugosa by the Night Interruption Time

야파(night interruption)처리에 의한 배초향의 항산화 물질 증가

  • Kim, Sungjin (Department of Horticultural Science, Chungnam National University) ;
  • Noh, Seungwon (Department of Bio-AI Convergence, Chungnam National University) ;
  • Park, Jongseok (Department of Horticultural Science, Chungnam National University)
  • 김성진 (충남대학교 원예학과) ;
  • 노승원 (충남대학교 바이오 AI 융합학과) ;
  • 박종석 (충남대학교 농업생명과학대학 원예학과)
  • Received : 2022.09.06
  • Accepted : 2022.10.10
  • Published : 2022.10.31

Abstract

The objective of this study was to determine the proper night interruption of photoperiods and dark periods for accumulating bioactive compounds of Agastache rugosa without decreasing plant growth. Five-week-old seedlings were transplanted in a DFT system with white LEDs. A. rugosa was treated with night interruption time treatments of 18:1:2:3, 18:2:2:2, 18:3:2:1 (light:dark:light:dark), and 20:4 (control) for 4 weeks. There were no significant differences except for leaf length, leaf width, and the number of flowers. The content of antioxidants in the shoot of A. rugosa was high in tilianin and acacetin, and the content of rosmarinic acid (RA) was significantly higher in the underground part. The RA content per dry weight of A. rugosa was 47.92 and 51.46% higher than that of the control in 18:1:2:3 and 18:2:2:2, and tilianin and acactin per dry weight were significantly higher in 18:3:2:1. There was no significant difference in growth due to the same day light integral, but 18:2:2:2 showed high total polyphenol contents. Therefore, it is thought that the effect of increasing secondary metabolites of A. rugosa without degradation of growth can be expected through night interruption treatment in plant factory cultivation systems using artificial light.

본 연구는 식물 공장에서 배초향(Agastache rugosa Kuntze) 재배 시, 야파시간에 따른 생육과 항산화 물질 함량에 미치는 영향에 대하여 살펴보고자 수행하였다. 본엽 4매인 배초향 묘를 백색 LEDs를 이용한 수경재배 시스템에 정식하였다. 야파처리 효과를 알아보기 위해 06시부터 광도 200μmol·m-2·s-1 조건으로 시간을 24시간 주기에서 18:1:2:3, 18:2:2:2, 18:3:2:1(명기:암기:명기:암기) 비율로 처리하였으며 대조구는 20:4(명기:암기)로 설정하여 4주간 재배하였다. 엽장과 엽폭, 화아수를 제외하고는 유의적 차이가 발생하지 않았다. 배초향 지상부의 항산화물질 함량은 tilianin과 acacetin이 높았고, 지하부에서는 rosmarinic acid(RA)의 함량이 유의하게 높았다. 배초향의 건물중당 RA함량은 18:1:2:3과 18:2:2:2에서 대조구보다 47.92, 51.46% 높았고, 건물중당 tilianin과 acactin은 18:3:2:1에서 유의적으로 높게 나타났다. 야파처리를 하였을때 동일한 누적 광량으로 인해 생육 차이를 보이지 않았지만, 18:2:2:2의 야파처리가 총 폴리페놀 함량이 높게 나타났다. 따라서 인공광을 이용한 배초향 재배 시스템에서 야파처리를 통하여 생육 저하 없이 배초향의 항산화 물질 증대 효과를 기대할 수 있을 것으로 사료된다.

Keywords

Acknowledgement

본 결과물은 농림축산식품부의 재원으로 농림식품기술기획평가원의 농업기반 및 재해대응 기술개발사업의 지원을 받아 연구되었음(322077-3).

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