Plant Growth-Promoting Rhizobacteria Isolated from Degraded Habitat Enhance Drought Tolerance of Acacia (Acacia abyssinica Hochst. ex Benth.) Seedlings

Table 3

Growth determined at OD 600 nm of selected PGPR isolates at varying pH ranges.

Isolate	pH4	pH5	pH7	pH9	pH10
BS-27	0.12 ± 0.01^c	0.44 ± 0.04^cd	1.26 ± 0.21^abcd	0.68 ± 0.02^bc	1.13 ± 0.09^abc
FB-50	0.14 ± 0.02^bc	0.43 ± 0.05^cd	1.32 ± 0.19^abcd	0.4 ± 0.08^def	1.11 ± 0.12^abc
RS-45	0.08 ± 0.01^c	0.15 ± 0.05^e	1.39 ± 0.09^ab	0.3 ± 0.05^ef	1.17 ± 0.11^ab
FB-49	0.26 ± 0.04^a	0.67 ± 0.09^bc	1.46 ± 0.11^a	0.85 ± 0.14^ab	1.32 ± 0.23^a
RS-72	0.12 ± 0.04^c	0.24 ± 0.05^de	1.05 ± 0.04^b	0.42 ± 0.09^ef	0.97 ± 0.07^bcd
BS-19	0.11 ± 0.02^c	0.14 ± 0.06^e	1.11 ± 0.10^bcd	0.26 ± 0.06^f	0.80 ± 0.11^cd
RS-79	0.21 ± 0.02^ab	0.84 ± 0.06^a	1.20 ± 0.14^abcd	0.51 ± 0.15^cde	0.70 ± 0.15^d
PS-16	0.07 ± 0.02^c	0.42 ± 0.05^cd	1.39 ± 0.06^ab	0.54 ± 0.14^cde	1.13 ± 0.116^abc
BS-65	0.09 ± 0.02^c	0.63 ± 0.05^b	1.09 ± 0.10^cd	0.65 ± 0.15^bcd	1.01 ± 0.04a^bcd
PS-2	0.06 ± 0.03^c	0.49 ± 0.08^bc	1.34 ± 0.03^abc	0.93 ± 0.05^a	1.18 ± 0.03^ab

Means with the same letter down the column are not significantly different with mean ± SD, n = 3.