N-Acyl Homoserine Lactone-Mediated Quorum Sensing with Special Reference to Use of Quorum Quenching Bacteria in Membrane Biofouling Control

Table 2

AHLs producing bacteria present in wastewater treatment systems and quorum sensing phenotypes regulated.

Bacterial strains	AHLs produced	Phenotypes regulated	Reference
A. hydrophila subsp. hydrophila strain NA1, A. hydrophila subsp. dhakensis strain LBA2, A. media strain NA2, En. ludwigii strain SWA1, K. variicola strain SWA2, and S. marcescens strain SWA6	Short- to medium-chain	Biofilm formation	[88]
Enterobacter sp. strain LBA3, En. cancerogenus strain LBA4, Raoultella ornithinolytica strain TSA7, P. japonica strain TSA3, and Citrobacter freundii strain R2A5	Long-chain	Biofilm formation	[88]
A. hydrophila, A. media, A. punctate, A. sobria, A. veronii, A. jandaei, P. oryzihabitans, Ci. farmer, Ci. murliniae, and En. ludwigii	Short- to medium-chain	n.d.	[89]
A. punctata GC3, Aeromonas sp. GC5, A. hydrophila GC10, A. allosaccharophila GC15, A. media GC16, Citrobacter sp. GC20, Acinetobacter johnsonii GC23, Klebsiella sp. GC30, Shigella sp. GC37, Microbacterium paraoxydans GC42, Chitinimonas taiwanensis GC43, Pantoea  agglomerans GC47, Ra. terrigena GC49,and Microbacterium sp. GC50	Short- to medium-chain	n.d.	[90]
A. punctata GC4, Aeromonas sp. GC8, Aeromonadaceae sp. GC14, Citrobacter sp. GC19, Neisseria sp. GC34, Pseudomonas sp. GC35, and Malikia  spinosa GC45	Long-chain	n.d.	[90]
Ac. junii	Medium-chain	Biofilm formation	[91, 92]
A. hydrophila	Short-chain	n.d.	[93]
P. putida	Medium-chain	n.d.	[93]
Ed. tarda	Short- and medium-chain	Virulence factor	[54]

n.d.: not determined; short-chain: C₄-HSL and C₆-HSL; medium-chain: C₆-HSL, 3-oxo-C₈-HSL, and C₈-HSL; long-chain: C₈-HSL, 3-oxo-C₈-HSL, C₁₀-HSL, C₁₂-HSL, 3-oxo-C₁₂-HSL, and C₁₄-HSL.