Diversity of nitrogen-fixing bacteria in Suaeda salsa rhizosphere during reproduction in the Yellow River delta
Deliang Xu,
Qikang Wang,
Meng Gao,
Yating Li,
Youjun Wang,
Yuxin Jiang,
Xiaohong Guo,
Nan Wu
Affiliations
Deliang Xu
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China
Qikang Wang
Key Laboratory of Ecological safety and Sustainable Development in Arid Lands, Northwest institute of Eco-Environments and Resources, Chinese Academy of sciences, Lanzhou 730000, China; Key Laboratory of stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Northwest institute of Eco-Environments and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China
Meng Gao
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China
Yating Li
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China
Youjun Wang
Institute of Blue Economic Research, Weihai 264200, China
Yuxin Jiang
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China
Xiaohong Guo
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China
Nan Wu
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China; Corresponding author
Summary: Salinization in the Yellow River delta poses a challenge for agriculture, but nitrogen-fixing bacteria can improve soil nitrogen content and enhance plant growth under salt stress. This study focuses on the salt-tolerant plant Suaeda salsa, analyzing its plant traits and the diversity of nitrogen-fixing bacteria in its rhizosphere using the nifH gene. Results show a gradual decline in plant height, fresh weight, and microbial diversity from inland to coastal areas. The rhizosphere bacteria, mainly from the Proteobacteria and Cyanobacteria phyla, are influenced by environmental factors such as alkali hydrolyzed nitrogen (AN), soil organic matter (SOM), electrical conductivity (EC), and pH. The rhizosphere serves as a microbial resource with potential agricultural applications for saline soils.
