Breaking the reproducibility barrier with standardized protocols for plant-microbiome research

Area of Science:

• Microbiome research
• Plant-microbe interactions
• Synthetic biology

Background:

• Inter-laboratory replicability is a major challenge in microbiome research.
• Understanding molecular mechanisms requires reproducible experimental systems for soil health and plant growth.

Purpose of the Study:

• To advance reproducibility in microbiome studies through collaborative replication of synthetic community assembly experiments.
• To compare fabricated ecosystems using synthetic bacterial communities, Brachypodium distachyon, and EcoFAB 2.0 devices across five laboratories.

Main Methods:

• Global collaboration involving five laboratories to replicate synthetic community assembly experiments.
• Utilized synthetic bacterial communities, the model grass Brachypodium distachyon, and sterile EcoFAB 2.0 devices.
• Employed comparative genomics, exudate utilization assays, and motility assays to investigate microbial colonization.

Main Results:

• Consistent inoculum-dependent changes in plant phenotype, root exudate composition, and bacterial community structure were observed across all labs.
• Paraburkholderia sp. OAS925 demonstrated a significant ability to shift microbiome composition.
• pH-dependent colonization ability of Paraburkholderia was identified as a key factor, linked to exudate utilization.

Conclusions:

• The study successfully demonstrated replicable synthetic community assembly experiments across multiple laboratories.
• Detailed protocols, benchmarking datasets, and best practices were established to enhance reproducibility in microbiome science.
• Findings inform future multi-laboratory studies and the development of reliable experimental systems for microbiome applications.