Transcriptomic Analysis Identifies Molecular Response of the Tolerant Alfalfa (Medicago sativa) Cultivar Nongjing 1 to Saline-Alkali Stress

文献类型： 外文期刊

第一作者： Zhang, Dongmei

作者： Zhang, Dongmei;Shen, Zhongbao;Han, Weibo;Mou, Linlin;Zhuang, Xu;Wang, Jianli;Li, Jinxia;Zhang, Yiming;Zhang, Yuanhao;Wang, Wenhui;Li, Zhaohui;Zhu, Peng;Huang, Yongshun;Han, Long;Wang, Mingyu;Zhang, Zijian;Pang, Qiuying;Li, Lixin;Li, Jinxia

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关键词： Medicago sativa; saline-alkali adaptation; yield; flavonoid biosynthesis; transcriptional regulation

期刊名称：BIOLOGY-BASEL （ 影响因子：3.5； 五年影响因子：4.0 ）

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年卷期： 2025 年 14 卷 4 期

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收录情况： SCI

摘要： Alfalfa (Medicago sativa) is a perennial forage crop with significant economic and ecological significance. If alfalfa can be planted in saline-alkali land, it will not only improve the utilization rate of marginal land and alleviate the competition between forage and cereal crops for arable land but will also increase the yield of high-quality domestic forage. In this study, we conducted transcriptomic analysis on the saline-alkali-tolerant alfalfa cultivar NQ-1 and compared its metabolite accumulation levels with saline-alkali-sensitive cultivars. The results showed that under saline-alkali stress, the photosynthesis and some secondary metabolic pathways in NQ-1 were activated, such as alpha-Linolenic acid metabolism, Phenylpropanoid and Flavonoid biosynthesis, and Photosynthesis-related pathways, providing substances and energy for enhancing NQ-1 stress tolerance. Furthermore, some specific flavonoids were detected that may contribute to the saline-alkali tolerance of NQ-1. In addition, transcription factors that may regulate flavonoid biosynthesis in NQ-1 under saline-alkali stress were also identified. This study deepens the understanding of the resistance mechanism of saline-alkali-tolerant cultivars of alfalfa and provides valuable information for molecular design breeding strategies for stress-resistant alfalfa.

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