Table 1.

In vitro activities related to plant growth promotion by E. cloacae and K. pneumoniae strains isolated from banana plants.

Strain	IAA production∗ (μg/mL)	Phosphate solubilization Index∗∗	N2-fixing capacity	Siderophore production	ACCd
E. cloacae	74.2 ± 0.04	148.59 ± 5.38	+	+	−
K. pneumoniae	0.328 ± 0.020	131.11 ± 7.84	+	−	−
E. coli ATCC 25922	5.478 ± 0.5319	ND	+	ND	+

^∗Average values determined in four replicates samples from cultures on 50%TSB liquid medium supplemented with 5 mM tryptophan. ^∗∗Averages of solubilization index determined in three replicated cultures on PKV agar plates supplemented with hydroxyapatite. Solubilization index (SI), diameter of the colony plus halo zone/diameter of the colony. ACCd, 1-Amino Cyclopropane-1-Carboxylate deaminase. ±, standard error (SE); +, positive; −, negative; ND, non-detected.