Table 1.

Representative genes selected to explore the potential growth-promoting traits of the bacteria. AP02: Herbaspirillum sp.; AP21: Herbaspirillum sp.; D7: Azospirillum brasilense.; N7: Pseudomonas fluorescens. PGP, plant growth-promoting; ACC, 1-aminocyclopropane-1-carboxylate.

PGP Trait	Gene	Protein	AP02	AP21	D7	N7	Reference
ACC deaminase	acdS	1-aminocyclopropane-1-carboxylate deaminase	+	+	−	+	Glick et al. [44]
Indolic compounds production	iaaM	Monoamine oxidase	-	-	-	+	Wisniewski-Dyé et al. [45]
	ipdC	Indole-3-pyruvate decarboxylase	+	-	+	-	Wisniewski-Dyé et al. [45]
Exopolysaccharides (EPS) and Lypopolysaccharides production (LPS)	noeJ	Mannose-1-phosphate guanylyltransferase	-	-	-	-	Lerner et al. [46]
	noeL	GDP-mannose 4,6-dehydratase	-	-	-	-	Lerner et al. [46]
	rfbB	dTDP-glucose 4,6-dehydratase	-	-	+	+	Balsanelli et al. [43]
	rfbC	dTDP-4-dehydrorhamnose 3,5-epimerase	-	-	+	-	Balsanelli et al. [43]
Colonization: Biofilm formation	flmA	Putative sugar nucleotide epimerase/dehydratase	-	-	+	-	Rossi et al. [47]
	flmB	Flagellin modification protein FlmB	-	-	+	-	Rossi et al. [47]
Volatile Organic Compounds	gacA	Response regulator GacA	-	-	-	+	Cheng et al. [48]
	gacS	Histidine kinase	-	-	-	+	Cheng et al. [48]