Table 2.

Summary of the features of the mutant strains investigated in this study

	FB01mut1	yusV	pabB	degU	sigD	pznA	sfp/yczE	sigH	RBAM 017410	nrfA	abrB
Feature	Wild type	biofilm	biofilm	Swarming motility	Transcription factor	plantazolicin	surfactin	Transcription factor	Plant growth promotion	Plant growth promotion	Plant growth promotion
Growth
Biofilm	+	(+)	(+)	(+)	+	(+)	−	+	+	+	+
Swarming	+	+	+	−	−	+	+	+	+	+	+
Root colonization	+	?	?	(+)	(+)	?	(+)	(+)	(+)	?	(+)
CLSM:
Root tip	+	−	−	−	−	−	−	−	−	−	−
Border cells	+	+	+	(+)	−	(+)	−	−	−	+	+
Lateral root	+	−	−	−	(+)	+	−	?	−	−	?
Root surface	+	+	+	−	−	+	−	−	−	+	−