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2025 Vol.38, Issue 3 Preview Page

Research Article

Shading Treatment-Induced Changes with Growth and Physiological Characteristics in Delphinium maackianum Regel
Seungju Jo1
,
Dong-Hak Kim2
,
Jung-Won Yoon3
,
Eun Ju Cheong4
1Master’s Degree Researcher, DMZ Botanic Garden, Korea National Arboretum, Yanggu 24564, Korea
2Research Official, Forest Biodiversity Conservation Division, Korea National Arboretum, Pocheon 11186, Korea
3Research Official, Garden and Education Research Division, Korea National Arboretum, Pocheon 11186, Korea
4Professor, Department of Forest Environmental System, Kangwon National University, Chuncheon 24341, Korea
*Corresponding Author
1 June 2025. pp. 300-312
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Abstract

Delphinium maackianum was grown under different shade treatments to examines the impact of different shading levels on the growth, physiological characteristics. The leaf mass per area (LMA) was lowest in the 95% shading treatment, indicating thinner and broader leaves, however significant differences were not observed across shading levels. Chlorophyll content (a, b, and total) increased with higher shading. Fv/Fm and NPQ values showed no significant differences among treatment groups except for the full light treatment, suggesting maintained photosystem II functionality and photoprotective mechanisms. The dark respiration rate (Rd) and light compensation point (LCP) decreased with increased shading, reflecting shade-tolerant plant responses. The 95% shading treatment exhibited the highest photosynthetic rates, light saturation points (LSP), and apparent quantum yields (AQY), indicating enhanced photosynthetic efficiency under low light conditions. Correlation analysis revealed negative relationships between relative light intensity and several physiological traits, including chlorophyll content, LCP, LSP, maximum photosynthetic rate, and AQY. This indicates that D. maackianum optimizes photosynthesis under low light conditions by increasing light absorption and utilization efficiency. The study underscores the species’ ability to adjust its physiological processes and structural characteristics to thrive in varying shading environments, highlighting its adaptive strategies for survival and growth in shaded habitats.

Keywords
Chlorophyll
Maack’s larkspur
North lineage plant
Photosynthesis
Plant propagation
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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 : 38
  • No :3
  • Pages :300-312
  • Received Date : 2024-09-09
  • Revised Date : 2024-12-07
  • Accepted Date : 2024-12-16
  • DOI :https://doi.org/10.7732/kjpr.2025.38.3.300
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