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Bacillus velezensis S141: A Soybean Growth-Promoting Rhizosphere Bacterium
Ken-Ichi Yoshida1, Neung Teaumroong2
1Department of Science, Technology and Innovation, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan.
Plants (Basel, Switzerland)
|February 13, 2026
Summary
Soybean root exudates shape soil microbes, influencing plant growth. Specific bacteria like Bacillus velezensis S141 enhance nutrient uptake and yield, paving the way for sustainable agriculture.
Area of Science:
- Rhizosphere biology and plant-microbe interactions.
- Sustainable agriculture and crop improvement.
Background:
- Soybean (Glycine max) is vital for global food security and sustainable farming.
- Root exudates, including isoflavones, mediate complex signaling between soybean and soil microbes.
- These interactions influence nutrient acquisition, stress tolerance, and disease resistance.
Purpose of the Study:
- To review current knowledge on soybean-microbe interactions within the rhizosphere.
- To highlight the role of specific plant growth-promoting rhizobacteria (PGPR), such as Bacillus velezensis S141.
- To explore the potential of harnessing rhizosphere signaling for climate-resilient soybean cultivation.
Main Methods:
- Review of existing literature on soybean rhizosphere biology and microbial interactions.
- Focus on Bacillus velezensis S141's unique traits: isoflavone hydrolysis, phytohormone production, and drought resilience.
- Analysis of coinoculation studies with Bradyrhizobium spp. and comparative genomics of S141.
Main Results:
- Bacillus velezensis S141 demonstrates enhanced nodulation, nitrogen fixation, and yield when coinoculated with Bradyrhizobium spp.
- Transcriptomic and ultrastructural data support the benefits of S141 coinoculation.
- Genomic analysis reveals host-adaptive characteristics of S141.
Conclusions:
- Soybean rhizosphere acts as a dynamic communication network crucial for plant health and productivity.
- Bacillus velezensis S141 shows significant potential for improving soybean cultivation.
- Further research into metabolite signaling and microbial consortia is needed for optimizing low-input, climate-resilient farming.
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