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2024 Vol.42, Issue 1 Preview Page

Research Article

Effects of LED Light Quality Combinations on Growth and Leaf Colour of Tissue Culture-Generated Plantlets in Sedum rubrotinctum
Chuncan Si1
,
Ying Lin1
,
Sumei Luo2
,
Yanhua Yu1
,
Ruiqing Liu1
,
Misbah Naz3
,
Zhicong Dai345*
1School of Biological and Environmental Engineering, Jingdezhen University, Jingdezhen 333400, China
2Department of Ganzhou Flower and Vegetables Research Institute, Ganzhou 341413, China
3Institute of Environment and Ecology, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
4Key Laboratory of Modern Agricultural Equipment and Technology Ministry of Education, Jiangsu University, Zhenjiang 212013, China
5Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology Suzhou 215009, China
*Corresponding Author
28 February 2024. pp. 53-67
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Abstract

Different plants have different requirements with regard to light quality, including combinations of R/B LED light on tissue-culture-generated plants. However, the effects of R/B LED light combinations on the growth and colour changes of leaves in succulent plants remains unknown. In this study, to identify the most beneficial light quality and R/B light ratios for the growth of the succulent plant species Sedum rubrotinctum and its production of attractive colours, the growth parameters, pigment levels and leaf colour phenotypes of tissue-culture-generated S. rubrotinctum plantlets were evaluated when the plantlets were exposed to R, 4R1B, 3R1B, 2R4B, B and W treatments for 90 days. The results showed that light quality obviously influenced the growth and leaf colour of tissue-culture-generated S. rubrotinctum plantlets. R light hastened the elongation of stems, and B light was more beneficial for biomass accumulation and leaf and root growth. However, compared with B light, R light, and W light, the R/B combination resulted in a greater amount of fresh biomass and higher values for the shoot/root FW, stem diameter, crown width, total root length, root surface area, and root volume. The R/B combination also markedly increased the contents of anthocyanins and the R/green chromaticity of the leaves. In addition, a principal component analysis (PCA) revealed the following comprehensive ranking: 4R1B > 2R4B > 3R1B > W > B > R. Therefore, the 4R1B combination is suggested as the best treatment for promoting the growth of tissue-culture-generated S. rubrotinctum plantlets and their production of attractive colours. This study provides a practically significant and optimal solution for growth regulation via light quality for the production of S. rubrotinctum as well as important implications for other succulent plant species in the Crassulaceae family.

Keywords
chroma analysis
growth parameter
pigment content
principal component analysis
succulent plants
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Information
  • Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
  • Publisher(Ko) :원예과학기술지
  • Journal Title :Horticultural Science and Technology
  • Journal Title(Ko) :원예과학기술지
  • Volume : 42
  • No :1
  • Pages :53-67
  • Received Date : 2023-10-19
  • Revised Date : 2023-12-02
  • Accepted Date : 2023-12-05
  • DOI :https://doi.org/10.7235/HORT.20240005
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