数字农科院2.0

High Proportion of Blue Light Contributes to Product Quality and Resistance to Phytophthora Infestans in Tomato Seedlings

文献类型： 外文期刊

作者： Jiang, Chengyao;Ma, Yue;Zhang, Kexin;Song, Yu;Liu, Zixi;Li, Mengyao;Zheng, Yangxia;Ge, Sang;Pan, Tonghua;Xie, Junhua;Lu, Wei

作者机构：

关键词： Solanum lycopersicum;LED light environment;ascorbic acid;glutathione;plant-pathogen interaction

期刊名称： AGRICULTURE-BASEL

ISSN：

年卷期： 2025 年 15 卷 19 期

页码：

收录情况： SCIE（2025版）

摘要： Plant seedlings are sensitive to cultivation environment factors and highly susceptible to pathogenic infections under adverse conditions such as inappropriate light environment. In this study, five kinds of LED lighting sources with different red (R) and blue (B) light combinations were set up: R10B0, R7B3, R5B5, R2B8 and R0B10 (with R:B ratios of 10:0, 7:3, 5:5, 2:8 and 0:10, respectively) to explore their effects on tomato seedlings' growth, AsA-GSH cycle, endogenous hormones, and resistance to Phytophthora infestans, providing a basis for factory seedling light-quality selection. The results showed that with the increase in the proportion of blue light in the composite light, the growth indicators, photosynthetic characteristic parameters and enzyme activities of tomato seedlings generally increased. The contents of AsA, reduced glutathione, and oxidized glutathione all reached the maximum under high-proportion blue-light treatments (R2B8 and R0B10). The high-blue-light groups (R2B8 and R0B10) had the highest AsA and glutathione contents. The red-blue combinations reduced inhibitory ABA and increased growth-promoting hormones (e.g., melatonin), while monochromatic light increased ABA to inhibit growth. After inoculation with P. infestans, the apoplastic glucose content was the highest under the red-blue-combined treatments (R5B5 and R2B8), while the total glucose content in leaves was the highest under the combined light R2B8 treatment. In conclusion, high-proportion blue-light treatment can greatly promote the photosynthetic process of tomato, enhance the AsA-GSH cycle, and achieve the best effect in improving the resistance of tomatoes to P. infestans. Given these, the optimal light environment setting was R:B = 2:8.

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