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Article Abstract
The excessive use of chemical fertilizers in tea cultivation threatens soil health, environmental sustainability, and long-term crop productivity. This study explores the application of plant growth-promoting bacteria (PGPB) as an eco-friendly alternative to conventional fertilizers. A bacterial consortium was developed using selected rhizobacterial isolates-, five strains of , and two spp.-based on their phosphate and zinc solubilization abilities and production of ACC deaminase, indole-3-acetic acid, and siderophores. The consortium was tested in both pot and field conditions using two tea clones, S3A3 and TS491, and compared with a chemical fertilizer treatment. Plants treated with the consortium showed enhanced growth, biomass, and antioxidant activity. The total phenolic contents increased to 1643.6 mg GAE/mL (S3A3) and 1646.93 mg GAE/mL (TS491), with higher catalase (458.17-458.74 U/g/min), glutathione (34.67-42.67 µmol/gfw), and superoxide dismutase (679.85-552.28 units/gfw/s) activities. A soil metagenomic analysis revealed increased microbial diversity and the enrichment of phyla, including , , , , and . Functional gene analysis showed the increased abundance of genes for siderophore biosynthesis, glutathione and nitrogen metabolism, and indole alkaloid biosynthesis. This study recommends the potential of a PGPB consortium as a sustainable alternative to chemical fertilizers, enhancing both the tea plant performance and soil microbial health.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12388101 | PMC |
| http://dx.doi.org/10.3390/microorganisms13081715 | DOI Listing |
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