Isolation and Identification of New Soil Strains with Phosphate-Solubilizing and Exopolysaccharide-Producing Abilities in the Yellow River Wetland Nature Reserve of Luoyang City, China

Xiaofei Sun, Yuting Niu, Yaoze Du, Chenxue Geng, Chunli Guo and Lina Zhao ()
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Xiaofei Sun: College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China
Yuting Niu: College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China
Yaoze Du: College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China
Chenxue Geng: College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China
Chunli Guo: College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China
Lina Zhao: College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471023, China

Sustainability, 2023, vol. 15, issue 4, 1-12

Abstract: The establishment of the Yellow River wetland nature reserves improves the local soil structure and fertility through the long-term succession of microorganisms. However, little is known about which indigenous microbial resources can accelerate the process of soil improvement and ecology restoration. To fill this gap, exopolysaccharides-producing bacteria and phosphate-solubilizing bacteria were isolated from soil samples of the wetland nature reserve with higher soil organic matter, available phosphorus, and available nitrogen content. 16S rRNA nucleotide sequence homology analysis and physiological-biochemical assay showed that the strain PD12 with the highest phosphate solubilization activity and higher EPS production was identified as Klebsiella variicola , and other high yield EPS-producing strains (EPS12, EPS15, EPS18, and EPS19) were identified as Pseudomonas migulae , Pseudomonas frederiksbergensis , Aeromonas media, and Pseudomonas vancouverensis , respectively. These results provided new potential microbial resources for the research and development of biofertilizers and added new insights into accelerating the restoration of physical, chemical, and biological properties of soil in the Yellow River basin.

Keywords: soil physiochemical properties; exopolysaccharide; phosphate-solubilizing bacteria; Yellow River (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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