数字农科院2.0

Short-term high-light intensity and low temperature improve the quality and flavor of lettuce grown in plant factory

文献类型： 外文期刊

作者： Zhang, Li;Zhang, Qiqi;Escalona Contreras, Victor Hugo;Huang, Tao;Jiang, Hui;Song, Bo;Duan, Zhiling;Li, Yuejian;Yang, Xiao;Song, Hongyuan;Yang, Qichang

作者机构：

关键词： light quality;temperature;nutritional value;bitterness;leafy vegetables

期刊名称： JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE

ISSN： 0022-5142

年卷期： 2024 年

页码：

收录情况： SCIE（2024版）

摘要： BACKGROUNDLettuce holds a prominent position in the year-round supply of vegetables, offering a rich array of health-beneficial substances, such as dietary fiber, phenolic compounds, lactucopicrin and lactucin. As such, its flavor has garnered increasing attention. Balancing the enhancement of beneficial compounds with the reduction of undesirable taste is a key focus of scientific research. To investigate short-term management to improve the nutritional quality and flavor of lettuce, combinations of different light intensities (200, 500 and 800 mu m ol m-2 s-1) and temperatures (10 and 22 degrees C) were applied separately to 'Lollo Rosso' and 'Little Butter Lettuce' for 7 days before harvest.RESULTSThe results obtained showed that increasing light intensity at low temperatures decreased nitrate content and increased soluble sugar, soluble protein, anthocyanin and phenolic compound content. In the case of lettuce flavor, the bitterness-related metabolites such as lactucin and lactucopicrin were reduced with high light intensity at a low temperature of 10 degrees C. With this combination, the fructose and glucose contents increased, significantly improving lettuce flavor.CONCLUSIONHigher light intensity combined with low temperature for 7 days before harvest effectively improved the nutritional quality and flavor of lettuce, suggesting its great potential for use in horticultural practices. (c) 2024 Society of Chemical Industry.

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