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- Title
Streptomyces canus GLY-P2 degrades ferulic and p-hydroxybenzoic acids in soil and affects cucumber antioxidant enzyme activity and rhizosphere bacterial community.
- Authors
Wu, Fenghui; Shi, Qinghua; Wang, Xiu-Juan; Sun, Zhong-Tao; Wang, Wanying; Li, Xue; Guo, Li-Yuan; Bai, Ji-Gang
- Abstract
Aims: The present study was conducted to investigate the effectiveness of Streptomyces (GLY-P2) in degradation of ferulic acid (FA) and p-hydroxybenzonic acid (PHBA) in the rhizosphere of cucumbers by assaying the alteration of antioxidant enzymes activities and rhizospheric microbial community.Methods: GLY-P2 was isolated, identified as Streptomyces canus, and applied to cucumber-planted soil containing FA and PHBA.Results: Optimal conditions for FA and PHBA degradation by GLY-P2 were 40 °C, pH 7, and 0.2 g l−1 mixture of FA and PHBA. During the degradation, vanillin, vanillic acid, and protocatechoic acid were metabolites; and activities of superoxide dismutase (SOD), catalase, ascorbate peroxidase (APX), and dehydroascorbate reductase in GLY-P2 were induced. When inoculated into cucumber-planted soil containing 220 μg g−1 mixture of FA and PHBA, GLY-P2 degraded FA and PHBA in soil, improved plant growth, and decreased malonaldehyde, superoxide radical, and hydrogen peroxide levels in leaves. GLY-P2 also enhanced activities of SOD, catalase, glutathione peroxidase, APX, monodehydroascorbate reductase, dehydroascorbate reductase, and glutathione reductase, increased contents of ascorbate and glutathione, and elevated transcript levels of copper/zinc SOD, manganese SOD, catalase, and APX in leaves. Moreover, GLY-P2 changed soil bacterial richness, diversity, and community composition, and increased phosphatase, catalase, urease, and sucrase activities in rhizospheric soil.Conclusion: GLY-P2 mitigates FA and PHBA stress in cucumber by activating leaf antioxidant enzymes and affecting soil bacterial community.
- Subjects
STREPTOMYCES; FERULIC acid; HYDROXYBENZOIC acid; CUCUMBERS; ANTIOXIDANTS; RHIZOSPHERE microbiology
- Publication
Plant & Soil, 2019, Vol 436, Issue 1/2, p71
- ISSN
0032-079X
- Publication type
Article
- DOI
10.1007/s11104-018-03911-z