Table 2.

Quorum quenching activity shown by marine sponge bacterial isolates

QQ Isolate	Genus	Isolated from sponge	Biosensor reporter strains
			SP15	DSM 30191	NTL4‐(3OC10)a	NTL4‐(3OC12)b
AF46	Bacillus sp.	Genus Amphilectus	++c	+d	+	++
AF47	Bacillus sp.	Genus Amphilectus	++	+	+	++
AF52	Bacillus sp.	Genus Amphilectus	+	−/+e	+	+
B9853	Bacillus sp.	Class Hexactinellida	++	−/+	++	−f
B98C39	Pseudomonas sp.	Class Hexactinellida	IGa	+	−/+	+
B98C22	Psychrobacter sp.	Class Hexactinellida	+	−	−	−
B98C566	Staphylococcus sp.	Class Hexactinellida	+	−	−	−
B98SK51b	Pseudomonas sp.	Class Hexactinellida	IG	+	−/+	+
B98SK52	Pseudomonas sp.	Class Hexactinellida	IG	IG	−/+	−/+
B98SK53b	Pseudomonas sp.	Class Hexactinellida	IG	IG	−/+	−/+
B98SM8	Pseudomonas sp.	Class Hexactinellida	IG	IG	+	−/+
CC32	Bacillus sp.	Genus Cliona	++	−/+	++	++
J10	Pseudoalteromonas sp.	Genus Polymastia	+	+	+	+
JC29	Pseudoalteromonas sp.	Genus Polymastia	IG	+	−	−
JM45	Paracoccus sp.	Genus Polymastia	−/+	−/+	+	+
W3	Pseudoalteromonas sp.	Genus Axinella	+	++	−/+	−/+
W11	Pseudoalteromonas sp.	Genus Axinella	+	+	−/+	−/+
W21	Pseudoalteromonas sp.	Genus Axinella	+	+	−/+	−/+

a. 3OC10: N‐(3‐Oxodecanoyl)‐l‐homoserine lactone.

b. 3OC12: N‐(3‐Oxododecanoyl)‐l‐homoserine lactone.

c. ++: strong pigment inhibition, QQ activity. Inhibition halo > 20.0 mm.

d. +: pigment inhibition, QQ activity. Inhibition halo from ˃ 2.5 mm to ≤ 20.0 mm.

e. −/+: weak response of pigment inhibition. Inhibition halo from 1.0 mm to ≤ 2.5 mm.

f. −: no inhibition of pigment, no QQ activity.

^aIG: inhibition of growth.