Optimization of Growth and Quality of Cucumber Scion Seedlings for Grafting Operations Under the Influence of Different LED Light Spectra

Articles in Press

Document Type : Full Paper

Authors

1 Department of Horticultural Science, Faculty of Agricultural & Natural Resources, University of Tehran, Karaj, Iran

2 Department of Horticultural Science, Faculty of Agricultural & Natural Resources, University of Tehran, Karaj, Iran

Abstract

In this research, the effects of different LED light spectra, including 100% green light (single spectrum), 40% red light + 60% blue light, 80% red light + 20% blue light, and 90% red light + 10% blue light (combined light treatments), with a constant intensity of 100 ± 5 μmol m-2 s-1, for 14 days were evaluated on ‘OREKA’ cucumber seedlings to optimize them for grafting. . According to the results, The seedling height in the green light treatment was 36% higher than the highest seedling height in the combined light treatments. Increasing the percentage of red light from 40% to 90% led to a 13.5% increase in stem diameter. Increasing the percentage of blue light from 10% to 60% led to a 55% and 38% reduction in leaf area and leaf dry mass, respectively. Increasing red light increased root length and root dry mass and other root traits. However, green light had a negative impact on root traits that’s causing a decrease in leaf area and dry weight in this treatment. The highest Light use efficiency occurred in treatments with a high percentage of red light. In the end, the light treatment with a ratio of 80% red light and 20% blue light can be suitable for producing cucumber scions.

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Iranian Journal of Horticultural Science

Articles in Press, Accepted Manuscript
Available Online from 15 April 2025

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History

  • Receive Date: 05 January 2025
  • Revise Date: 10 March 2025
  • Accept Date: 31 March 2025

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