Engineered DNA materials shape microbial physiology and ecological selection

A three-dimensional DNA hydrogel is linked to species- and consortium-specific shifts in bacterial stress responses and transcription, and it reshapes wastewater microbiome succession.

• Why it matters: eDNA is known for biofilm structure and as genetic material, but how engineered DNA materials act as ecological materials—shaping physiology and community assembly—remains unclear.
• What they did: The study engineered extracellular DNA hydrogels and compared them with surface-bound oligonucleotides, then measured stress-associated responses, transcription in a defined consortium, and succession in wastewater-derived microbiomes.
• The result: Metagenomic sequencing in wastewater-derived microbiomes identified rare, hydrogel-specific candidate junctions connecting material-derived DNA to microbial genomic sequences, suggesting an interface between extracellular DNA materials and microbial genetic information.

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