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Isolation, identification, and characterization of a strain resistant to cadmium, lead, and zinc from the rhizosphere of hyperaccumulator Celosia argentea Linn
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An-qi WANG1, Hua LIN1, 2, 3, Jie LIU1, 2, Yi LIN1, Xue-meng YANG1, Cai-xing LAI1, Zi-han DONG1, Guo YU1, 4, *
China Environmental Science | 2025, 45(5) : 2631 - 2642
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China Environmental Science | 2025, 45(5): 2631-2642
• Soil Pollution Control •
Isolation, identification, and characterization of a strain resistant to cadmium, lead, and zinc from the rhizosphere of hyperaccumulator Celosia argentea Linn
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An-qi WANG1, Hua LIN1, 2, 3, Jie LIU1, 2, Yi LIN1, Xue-meng YANG1, Cai-xing LAI1, Zi-han DONG1, Guo YU1, 4, *
Affiliations
  • 1.Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541006, China
  • 2.Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China
  • 3.Guangxi Engineering Research Center of Comprehensive Treatment for Agricultural Non-Point Source Pollution, Guilin University of Technology, Guilin 541006, China
  • 4.School of Environment, Tsinghua University, Beijing 100084, China
Published: 2025-05-20
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This study investigated the functional characteristics of plant growth-promoting rhizobacteria（PGPR）isolated from the rhizosphere soil of Celosia argentea Linn., a Cd-hyperaccumulator. A strain with high tolerance to Cd2-, Pb2-, and Zn2- was isolated. This strain was identified using physiological and biochemical characteristics analysis and sequence analysis of the 16S rDNA and nrdA functional genes. The effects of various culture conditions on the strain's growth and heavy metal removal capabilities, as well as its potential for promoting plant growth were examined. This strain was identified as Achromobacter sp., designated WL-37. The minimum inhibitory concentrations（MIC）of Cd2-, Pb2-, and Zn2- for strain WL-37 were determined to be 600, 1800, and 1000mg/L, respectively. Under optimized conditions（e.g., pH values and inoculation amounts）, the strain achieved maximum removal rates of 69% for Cd2+, 95% for Pb2+, and 62% for Zn2+. Moreover, WL-37 exhibited multiple plant-promoting traits, including nitrogen fixation, ACC deaminase production, and siderophore production. In summary, the high-efficiency strain identified in this study represents a valuable resource for the remediation of multi-metal contaminated soils and supports the development of plant-microbe combined remediation technologies.

strain identification  /  heavy metal pollution  /  removal efficiency  /  bioremediation  /  growth-promoting capabilities
An-qi WANG, Hua LIN, Jie LIU, Yi LIN, Xue-meng YANG, Cai-xing LAI, Zi-han DONG, Guo YU. Isolation, identification, and characterization of a strain resistant to cadmium, lead, and zinc from the rhizosphere of hyperaccumulator Celosia argentea Linn[J]. China Environmental Science, 2025 , 45 (5) : 2631 -2642 .
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Year 2025 volume 45 Issue 5
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Article Info
  • Receive Date：2024-09-03
  • Online Date：2026-03-18
  • Published：2025-05-20
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  • Received：2024-09-03
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Affiliations
    1.Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541006, China
    2.Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China
    3.Guangxi Engineering Research Center of Comprehensive Treatment for Agricultural Non-Point Source Pollution, Guilin University of Technology, Guilin 541006, China
    4.School of Environment, Tsinghua University, Beijing 100084, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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