TABLE 1.

Strains and plasmids used in this paper.

Strains or plasmids	Traits	Sources
E. coli WM3064	Gene cloning strain	Liu et al., 2016
Aeromonas veronii	Wild type strain	Liu et al., 2016
Δhfq	hfq deletion mutant	Zhang et al., 2019
Δhfq::hfq	hfq complement strain	Zhang et al., 2019
Δhfq::acrAB	acrAB overexpression in hfqmutant strain	This paper
pBBR1MCS-2	Gene cloning vector	Zhang et al., 2019
pBBR acrAB	acrA/B overexpression vector	This paper