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2024 Vol.37, Issue 2 Preview Page

Research Article

Changes in Growth and Physiological Characteristics of Iris laevigata Fisch. by Shading Treatment

차광처리가 제비붓꽃의 생장 및 생리적 특성에 미치는 영향

Seungju Jo1†
,
Dong-Hak Kim2†
,
Eun-Ju Cheong3
,
Jung-Won Yoon4
조 승주1†
,
김 동학2†
,
정 은주3
,
윤 정원4
1Master’s Degree Researcher, DMZ Botanic Garden, Korea National Arboretum, Yanggu 24564, Korea
2Researcher, Garden and Plant Resource Division, Korea National Arboretum, Pocheon 11186, Korea
3Professor, Department of Forest Environmental System, Kangwon National University, Chuncheon 24341, Korea
4Researcher, DMZ Botanic Garden, Korea National Arboretum, Yanggu 24564, Korea
1국립수목원, DMZ산림생물자원보전과, 석사후연구원
2국립수목원, 정원식물자원과, 연구사
3강원대학교, 산림환경시스템학과, 교수
4국립수목원, DMZ산림생물자원보전과, 연구사
*Corresponding Author
†These authors contributed equally to this work.
1 April 2024. pp. 203-213
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Abstract

In this study, we investigated the growth and physiological responses of Iris laevigata Fisch. to shading treatments in order to suggest optimal light conditions for ex-situ conservation of the northern lineage plants. For this purpose, a control plant receiving full sunlight and different shading treatments (50%, 75%, 95%) were installed, and leaf mass per area, chlorophyll content and fluorescence response, and photosynthetic characteristics were investigated. I. laevigata developed leaves with higher photosynthetic efficiency to adapt to lower light intensity as shading levels increased. Chlorophyll content increased with increasing shading levels, and leaf mass per area decreased with increasing leaf area. The chlorophyll fluorescence responses Fv/Fm and NPQ did not change with shading, and the activity of the carbon fixation system did not differ between treatments. I. laevigata exhibited a light-saturation point equivalent to that of sun plants and maintained photosynthetic capacity similar to that of controls up to 75% shading. The apparent quantum yield of I. laevigata decreased significantly at 95% shading, indicating adaptation to lower light conditions. It seems that the photosynthetic capacity of I. laevigata decreases when grown under 95% shading level compared to full sunlight, and it is judged that the longer the light is restricted by continuous shading, the more unfavorable the growth will be.

Keywords
Chlorophyll
CO2 assimilation rate
North lineage plant
Plant propagation
Photosynthesis
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Information
  • Publisher :The Plant Resources Society of Korea
  • Publisher(Ko) :한국자원식물학회
  • Journal Title :Korean Journal of Plant Resources
  • Journal Title(Ko) :한국자원식물학회지
  • Volume : 37
  • No :2
  • Pages :203-213
  • Received Date : 2024-01-29
  • Revised Date : 2024-03-12
  • Accepted Date : 2024-03-14
  • DOI :https://doi.org/10.7732/kjpr.2024.37.2.203
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