Apr 11, 2020

Towards a probiotic approach for building plumbing - Nutrient-based selection during biofilm formation on flexible polymeric materials

BioRxiv : the Preprint Server for Biology
L. NeuFrederik Hammes


Upon entering building plumbing systems, drinking water bacteria experience considerable changes in environmental conditions. For example, some flexible polymeric materials leach organic carbon, which increases bacterial growth and reduces diversity. Here we show that the carbon supply by a flexible polymeric material drives nutrient-based selection within establishing biofilm communities. We found that migrating carbon from EPDM coupons resulted in considerable growth for different drinking water communities (0.2 - 3.3 x 10^8 cells/cm^2). All established biofilm communities showed low diversity (29 - 50 taxa/biofilm), with communities dominated by even viewer taxa (e.g., 5 taxa accounting for 94 {+/-} 5 % relative abundance, n = 15). Interestingly, biofilm communities shared some taxa (e.g., Methylobacterium spp.) and families (e.g., Comamonadaceae), despite the difference in starting communities. Moreover, selected biofilm communities performed better than their original communities regarding maximum attachment (91 {+/-} 5 vs. 69 {+/-} 23 %, n = 15) and attachment rate (5.0 {+/-} 1.7 x 10^4 vs. 2.4 {+/-} 1.2 x 10^4 cells/cm^2/h, n = 15) when exposed to new EPDM coupons. Our results demonstrate nutrient-based selection during ...Continue Reading

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Mentioned in this Paper

Biochemical Pathway
Quantitative Trait Loci
Peripheral Blood
Transcription, Genetic
Signal Transduction Pathways

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