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Monitoring Bacterial Colonization and Maintenance on Arabidopsis thaliana Roots in a Floating Hydroponic System
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Published on: May 28, 2019

Simulated microgravity weakens wheat root microbial network against pathogens.

Jingjing Cui1,2, Zhenyu Chen1,2, Shaocheng Yan1,2

  • 1Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education; Key Laboratory of Innovation and Transformation of Advanced Medical Devices, Ministry of Industry and Information Technology; National Medical Innovation Platform for Industry-Education Integration in Advanced Medical Devices (Interdiscipline of Medicine and Engineering); School of Biological Science and Medical Engineering, Beihang University, Beijing, China.

NPJ Microgravity
|June 25, 2026
PubMed
Summary
This summary is machine-generated.

Fungal infection impacts plant root microbes differently in simulated microgravity, disrupting bacterial networks more severely. This microbial network instability affects plant growth and hormone levels, suggesting microbiome strategies for space farming resilience.

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Area of Science:

  • Plant pathology
  • Microbiology
  • Astrobiology

Background:

  • Fungal pathogens are significant plant stressors on Earth.
  • Their impact on root microbial communities in microgravity is largely unknown.
  • Space crop production faces risks from biotic stressors like fungal pathogens.

Purpose of the Study:

  • To investigate the effects of fungal infection on plant-associated bacterial and fungal communities under simulated microgravity.
  • To link microbial network properties to plant growth and hormone profiles.
  • To identify microbial taxa critical for network stability and plant resilience in space.

Main Methods:

  • Profiling bacterial and fungal communities in wheat seedlings under normal and simulated microgravity.
  • Analyzing microbial co-occurrence networks (bacterial-bacterial, fungal-fungal, bacterial-fungal).
  • Employing structural equation modeling and random forest analysis to link network properties with plant performance and hormone levels.

Main Results:

  • Simulated microgravity exacerbated the disruption of bacterial-bacterial and bacterial-fungal networks by Fusarium graminearum infection.
  • Bacterial network stability, reduced by simulated microgravity, positively correlated with plant performance and specific hormone levels (jasmonic acid, cytokinin).
  • Paenibacillus and Microbacteriaceae taxa were identified as key predictors of bacterial network stability.

Conclusions:

  • Microgravity conditions significantly alter plant-microbe interactions, particularly impacting bacterial network stability.
  • Microbiome-based strategies hold promise for enhancing plant resilience in space-based agricultural systems.
  • Understanding these microbial dynamics is crucial for ensuring food security in future space missions.