Bacillus subtilis 8-32 Enhances Tomato Growth and Reshapes Rhizosphere Microbial Communities: Insights into Plant-Microbe Interactions
Plant growth-promoting rhizobacteria (PGPR) play a crucial role in agriculture. Bacillus subtilis 8-32 exhibits strong pathogenic resistance and the ability to produce indole-3-acetic acid (IAA). This study focuses on its colonization in tomato cultivation and its impact on soil microorganisms.By constructing the GFP-labeled 8-32-GFP strain, this study found that it can stably colonize tomato roots. The 8-32 strain significantly promotes tomato growth, with remarkable effects on root indices and biomass accumulation. Following the application of 8-32-GFP, the abundance of beneficial bacteria such as Proteobacteria increases; it also reduces the total fungal population, inhibits pathogenic fungi, and optimizes the fungal community structure.In conclusion, Bacillus subtilis 8-32 is promising for application as a microbial fertilizer, which can reduce chemical inputs and contribute to sustainable agriculture.