The mechanisms of interaction between alfalfa root exudates and rhizosphere bacterial communities for adaptation to salt stress
文献类型：期刊论文
| 作者 | Zhou, Lingtong2,3; Zhu, Xinqiang3; Fu, Yunxing2; Luo, Wen2; Leng, Feifan2; Wang, Yonggang2; Yang, Hongshan3; Li, Shaowei1,4; Wang, Xiaoli3 |
| 刊名 | ENVIRONMENTAL AND EXPERIMENTAL BOTANY
 |
| 出版日期 | 2026-04-01 |
| 卷号 | 244页码:106344 |
| 关键词 | Salt stress Rhizosphere bacterial communities Root exudates Interaction mechanism Alfalfa (Medicago sativa L.) |
| ISSN号 | 0098-8472 |
| DOI | 10.1016/j.envexpbot.2026.106344 |
| 产权排序 | 3 |
| 文献子类 | Article |
| 英文摘要 | Soil salinity is a major abiotic factor reducing global crop yields and ecosystem sustainability. Root exudaterhizosphere microbe interaction plays a key role in regulating plant growth, development, and stress resistance. However, the mechanisms of how alfalfa root exudates and rhizosphere microbes interact to adapt to salt stress are still poorly understood. This study analyzed the salt stress tolerance mechanisms of two alfalfa varieties (ZT1 and ZT2) derived from the space mutagenesis breeding program by integrating rhizosphere microbiome and root exudate measurements with root and shoot phenotyping. ZT1 is salt-tolerant and has a stronger osmotic regulation ability and antioxidant enzyme system, while ZT2 is salt-sensitive. Salt-induced rhizosphere remodeling in ZT1 featured selective enrichment of specialized metabolites, including ormosanine and 7,4 '-dihydroxyflavone. Key flavonoid species (e.g., baicalein, phloretin-2 '-O-glucoside) and triterpene glycosides, including asiaticoside, were identified as crucial mediators of salt-stress adaptation. Microbial network analysis revealed concentration-dependent modulation of rhizosphere diversity: 100 mM NaCl enhanced species richness, while 200 mM NaCl stress caused significant diversity loss. This functional reorganization strengthened reciprocal interactions between core rhizobacteria and stress-responsive metabolites. Mantel test analyses demonstrated the predominant regulation of rhizosphere community assembly by root exudate profiles (r = 0.72, p < 0.01). This study reveals the microbial assembly mechanism mediated by alfalfa root exudates, clarifies the microbe-plant metabolic co-adaptation pattern under salt stress, and provides new directions for alfalfa cultivation in salinealkali soils. |
| URL标识 | 查看原文 |
| WOS关键词 | ASSAY |
| WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001717299100001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/221182]  |
| 专题 | 拉萨站高原生态系统研究中心_外文论文 |
| 通讯作者 | Li, Shaowei; Wang, Xiaoli |
| 作者单位 | 1.Tibet Acad Agr & Anim Husb Sci, Inst Agr Resources & Environm, Lhasa 850000, Peoples R China 2.Lanzhou Univ Technol, Sch Life Sci & Engn, Lanzhou 730050, Peoples R China; 3.Chinese Acad Agr Sci, Lanzhou Inst Husb & Pharmaceut Sci, Lanzhou 730046, Peoples R China; 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhou, Lingtong,Zhu, Xinqiang,Fu, Yunxing,et al. The mechanisms of interaction between alfalfa root exudates and rhizosphere bacterial communities for adaptation to salt stress[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2026,244:106344. |
| APA | Zhou, Lingtong.,Zhu, Xinqiang.,Fu, Yunxing.,Luo, Wen.,Leng, Feifan.,...&Wang, Xiaoli.(2026).The mechanisms of interaction between alfalfa root exudates and rhizosphere bacterial communities for adaptation to salt stress.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,244,106344. |
| MLA | Zhou, Lingtong,et al."The mechanisms of interaction between alfalfa root exudates and rhizosphere bacterial communities for adaptation to salt stress".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 244(2026):106344. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。