Transcriptomic response of wetland microbes to root influence.

Area of Science:

• Environmental Science
• Microbiology
• Biogeochemistry

Background:

• Wetlands are critical ecosystems for carbon and nutrient cycling.
• Plant-microbe interactions are key drivers of wetland biogeochemistry.
• Understanding the molecular basis of these interactions is essential.

Purpose of the Study:

• To investigate the transcriptomic and phylogenetic responses of soil microbes to root exudates in coastal wetlands.
• To elucidate the molecular mechanisms underlying plant-soil microbe interactions in these environments.

Main Methods:

• Utilized 13CO2 pulse labeling in coastal wetland soils.
• Employed metatranscriptomics to analyze microbial gene expression.
• Identified shifts in microbial community composition.

Main Results:

• Root exudates upregulated 388 microbial genes and downregulated 11.
• Key upregulated pathways involved infection, stress response, and motility.
• Observed increased relative abundances of specific bacterial phyla (Betaproteobacteria, Campylobacterota, Kiritimatiellota, Lentisphaerota, Verrucomicrobiota).

Conclusions:

• Root exudates induce significant transcriptional and phylogenetic shifts in wetland soil microbial communities.
• These findings provide a deeper mechanistic understanding of plant-microbe interactions in wetland ecosystems.
• Highlights the role of microbial responses to root influence in biogeochemical processes.