TABLE 1.

Rosette formation, attachment ability, and motility of bacteria belonging to the Roseobacter clade used in this study^a

Bacterial strain	Isolated from:	Formation of single cells or rosettes	Attachment ability	Motility	Reference
Sulfitobacter strain EE36	Coastal seawater	Rosettesb	+	+
Roseovarius strain ISM	Coastal seawater	Single cells	−	−	14
Sulfitobacter strain 1921	P. piscicida	Rosettesb	+	+
Silicibacter pomeroyi DSS-3	Coastal seawater	Rosettes	−	+	14
Sulfitobacter strain SE62	Coastal seawater	Rosettes	−	+
Roseobacter litoralis 49566	Seawater	Single cells	−	−	41
Roseobacter algicola 51442	Prorocentrum lima	Rosettes	−	+	23
Roseobacter denitrificans 33942	Seawater	Single cells	−	+	41
Silicibacter sp. strain TM1040	P. piscicida	Rosettesb	+	+	27
Roseobacter sp. strain TM1039	P. piscicida	Rosettesb	+	+	27
Roseovarius sp. strain TM1042	P. piscicida	Single cells	−	−	27
Roseovarius sp. strain TM1035	P. piscicida	Single cells	−	−	27
Roseobacter sp. strain TM1038	P. piscicida	Single cells	−	−	27
Phaeobacter strain 27-4	Turbot rearing facility	Rosettesb	+	+	20

^a+, possessed the indicated phenotype; −, did not possess the indicated phenotype.

^bRosette formation was pronounced in statically grown cultures.