Soil microbiota enhance the population growth rate of a nitrogen-fixing herbaceous legume
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View abstract on PubMed
Summary
This summary is machine-generated.Soil microbes significantly boost plant population growth, impacting species abundance. A full life-cycle analysis is crucial for understanding these effects on plants like Lupinus polyphyllus.
Area Of Science
- Ecology
- Plant Science
- Microbiology
Background
- Soil microbiota influence plant growth, chemistry, and population persistence.
- Assessing the full impact of soil microbes on long-lived plants requires a life-cycle approach.
Purpose Of The Study
- To investigate the effects of soil microbiota on fitness traits and population growth rate of Lupinus polyphyllus.
- To compare the influence of soil microbiota on native (North American) and invasive (Finnish) populations.
Main Methods
- Greenhouse experiment with intact vs. autoclaved soil inoculum from invasive populations.
- Recorded six fitness traits, characterized floral volatiles, and estimated population growth rate (λ) over two growing seasons.
- Utilized demographic modeling to assess population-level impacts.
Main Results
- Intact soil inoculum increased flowering probability across origins and affected early height differently based on origin.
- Population growth rate (λ) was significantly higher with intact inoculum (130% for invasive, 30% for native origins).
- Most fitness traits and floral volatiles were not significantly altered by soil microbiota treatment.
Conclusions
- Soil microbiota positively contribute to plant population persistence and can influence species abundance.
- A demographic approach considering the entire plant life cycle is essential for evaluating soil microbiota effects.
- Understanding plant-microbe interactions is key for predicting plant population dynamics.
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