Mechanism of microbial action of the inoculated nitrogen-fixing bacterium for growth promotion and yield enhancement in rice (Oryza sativa L.)
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View abstract on PubMed
Summary
This summary is machine-generated.Inoculating rice with nitrogen-fixing bacteria (Herbaspirillum R3) boosts crop yield by enhancing soil nutrients and beneficial microbial communities. This sustainable approach improves rice production and soil health.
Area Of Science
- Agricultural Microbiology
- Plant-Bacterial Interactions
- Soil Science
Background
- Nitrogen-fixing bacteria offer sustainable agricultural solutions for crop yield and soil health.
- Mechanisms by which these bacteria enhance rice production require further elucidation.
Purpose Of The Study
- To investigate the microbial mechanisms of nitrogen-fixing bacteria (Herbaspirillum R3) in enhancing rice growth.
- To assess the impact of R3 inoculation on rhizosphere soil nutrients, plant development, and microbial communities.
Main Methods
- Pot experiment inoculating rice seedlings with Herbaspirillum R3 in paddy soil.
- Analysis of rhizosphere soil nutrients, plant growth parameters, and nitrogen-fixing microbial communities (rhizosphere and endorhizosphere).
- Gene expression analysis of nitrogen absorption and transport-related genes in rice roots.
Main Results
- R3 inoculation significantly increased soil nitrate nitrogen, ammonium nitrogen, and available phosphorus.
- Rice yield increased by 8.81%, attributed to more panicles and higher seed setting rates.
- Inoculation altered microbial community structure, increasing alpha-diversity and abundance of key nitrogen-fixing genera, enhancing community stability and nitrogen-fixing capacity.
- Upregulation of rice genes OsNRT1 and OsPTR9 involved in nitrogen absorption and transport was observed.
Conclusions
- Herbaspirillum R3 inoculation enhances rice yield through improved soil nutrient availability and beneficial microbial community modulation.
- The study elucidates microbial mechanisms, supporting the use of nitrogen-fixing bacteria for sustainable rice production.
- Findings provide a scientific basis for agricultural practices aimed at increasing rice output and ecosystem services.
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