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Optimization of degradation conditions and mitigation the stress effect of p-hydroxybenzoic acid in cucumber rhizosphere by a strain of p-hydroxybenzoic acid degrading bacteria
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Peipei WU1, Xiufeng YUAN2, Jing FENG1, *
Acta Microbiologica Sinica | 2024, 64(7) : 2465 - 2478
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Acta Microbiologica Sinica | 2024, 64(7): 2465-2478
• Research Articles •
Optimization of degradation conditions and mitigation the stress effect of p-hydroxybenzoic acid in cucumber rhizosphere by a strain of p-hydroxybenzoic acid degrading bacteria
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Peipei WU1, Xiufeng YUAN2, Jing FENG1, *
Affiliations
  • 1 Guangxi Key Laboratory of Polysaccharide Materials and Modification, School of Marine and Biotechnology, Guangxi Minzu University, Nanning 530000, Guangxi, China
  • 2 School of Marine and Biotechnology, Guangxi Minzu University, Nanning 530000, Guangxi, China
Published: 2024-07-04 doi: 10.13343/j.cnki.wsxb.20230790
Outline
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Phenolic acids autotoxic substances secreted by plant roots, such as p-hydroxybenzoic acid (PHBA), are the main factors causing continuous cropping obstacles in plants. [Objective] In order to obtain PHBA degrading bacteria and improve its degradation efficiency. [Methods] A PHBA-degrading strain was isolated by screening medium and inorganic salt medium, and it was identified asMicrobacterium aurantiacum. The initial content of PHBA, culture temperature, pH and nitrogen source were optimized by single factor experiment and response surface methodology. [Results] The highest degradation rate was obtained when the PHBA content was 0.4 g/L, the temperature was 30 ℃, the pH was 8.0, and the nitrogen source was ammonium sulfate. The optimal degradation conditions were temperature 30.2 ℃, pH 8.3, and PHBA concentration 0.18 g/L, and the degradation rate reached 100%. Combined with pot experiments and high performance liquid chromatography, the results showed that the strain could effectively mitigate the PHBA stress effect in cucumber rhizosphere. [Conclusion] The strain ofMicrobacterium aurantiacum screened in this study has a high ability to degrade PHBA, and has the potential value in continuous cropping obstacles.

p-hydroxybenzoic acid  /  Microbacterium aurantiacum  /  responsive surface optimization  /  cucumber  /  pot experiments
Peipei WU, Xiufeng YUAN, Jing FENG. Optimization of degradation conditions and mitigation the stress effect of p-hydroxybenzoic acid in cucumber rhizosphere by a strain of p-hydroxybenzoic acid degrading bacteria[J]. Acta Microbiologica Sinica, 2024 , 64 (7) : 2465 -2478 . DOI: 10.13343/j.cnki.wsxb.20230790
Funding
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  • Natural Science Foundation of Guangxi Zhuang Autonomous Region(2023GXNSFBA026041)
  • National Natural Science Foundation of China(32360024)
Appendix
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Year 2024 volume 64 Issue 7
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Article Info
doi: 10.13343/j.cnki.wsxb.20230790
  • Receive Date：2023-12-22
  • Online Date：2026-03-19
  • Published：2024-07-04
Article Data
Affiliations
History
  • Received：2023-12-22
  • Accepted：2024-03-26
Funding
Natural Science Foundation of Guangxi Zhuang Autonomous Region(2023GXNSFBA026041)
National Natural Science Foundation of China(32360024)
Affiliations
    1 Guangxi Key Laboratory of Polysaccharide Materials and Modification, School of Marine and Biotechnology, Guangxi Minzu University, Nanning 530000, Guangxi, China
    2 School of Marine and Biotechnology, Guangxi Minzu University, Nanning 530000, Guangxi, China

Corresponding:

*FENG Jing, E-mail:
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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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