Auxin Responds to Flowing Nutrient Solution to Accelerate the Root Growth of Lettuce in Hydroponic Culture

文献类型： 外文期刊

第一作者： Xiang, Yue

作者： Xiang, Yue;Peng, Jie;Baiyin, Bateer;Yang, Qichang;Shao, Yang;Son, Jung Eek;Tagawa, Kotaro;Yamada, Satoshi;Yamada, Mina

作者机构：

关键词： flow condition; hydroponic cultivation; lettuce growth; nutrient solution; root phenotype; urban agriculture

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.7 ）

ISSN： 1661-6596

年卷期： 2025 年 26 卷 16 期

页码：

收录情况： SCI

摘要： Traditional soil cultivation of lettuce faces challenges; hydroponic technology offers solutions to improve lettuce production. However, the interrelationships among the root phenotype of lettuce, auxin synthesis and signal transduction, and nutrient solution flow, and their effects on hydroponic lettuce growth remain unclear. We investigated the effects of nutrient solution flow state on lettuce's early growth, transcriptomic changes, and auxin-related gene expression. Growth indicators were measured 2, 4, and 6 days after transplanting. The shoot and root fresh weights, total root length, and root surface area were significantly higher under the flow treatment than under the non-flow condition. The shoot fresh weight increased by 29, 64, and 31%, respectively, at the three growth stages. A clear distinction was observed between the samples from different treatment groups. The Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways that were commonly enriched included "Plant hormone signal transduction (auxin)". Moreover, the significantly enriched Gene Ontology (GO) terms varied across different time points, which vividly reflected the dynamic characteristics of the plant's response. Genes related to auxin biosynthesis-such as AL3F1, YUC5, and AMI4G-exhibited higher expression levels under the flow treatment. Overall, these results indicate that nutrient solution flow can promote auxin synthesis and signal transduction in early roots of lettuce.

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