研究目的
To investigate the effects of different LED wavelengths on the growth, development, photosynthesis, chlorophyll fluorescence characteristics, leaf structure, and chloroplast ultrastructure of Welsh onion (Allium fistulosum L.) plants.
研究成果
White and blue light significantly improved the photosynthetic efficiency of Welsh onions, whereas yellow light reduced the photosynthetic efficiency. The study provides a theoretical basis for the regulation of light environments in industrial facilities for Welsh onion production.
研究不足
The study focused on the effects of different LED wavelengths on Welsh onion plants under controlled conditions, which may not fully represent natural growing conditions. The study did not explore the long-term effects of these light treatments beyond 30 days.
1：Experimental Design and Method Selection:
The study tested the effects of different LEDs (white, W; blue, B; green, G; yellow, Y; and red, R) with the same photon flux density (300 μmol/m2·s) on Welsh onion plants.
2：Sample Selection and Data Sources:
Welsh onion variety 'Yuanzang' was used, grown in a light quality culture room.
3：List of Experimental Equipment and Materials:
Dimming plant lamps (Huizhou Kedao Technology Co., Ltd.), UNSPEC-DCTM spectrum analyzer (PP-SYSTEMS, UK), LI-3000C leaf area meter (LI-COR Biosciences, USA), Li-6800 portable photosynthetic apparatus (Li-COR, USA), M-series modulated Chl fluorescence imaging system (MINI-IMAGING-PAM, Walz, Effeltrich, Germany).
4：Experimental Procedures and Operational Workflow:
Plants were grown under different LED light treatments, and measurements included growth parameters, photosynthetic pigment content, photosynthetic characteristics, chlorophyll fluorescence, leaf anatomy, and chloroplast ultrastructure.
5：Data Analysis Methods:
Data were processed and statistically analyzed in Excel 2016 and DPS software, with differences among treatments tested using Duncan’s new multiple range test at a significance level of P ≤ 0.05.
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