International Journal of Microbiology

Research Article

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

Table 6

Plant growth promotion in A. abyssinica treated with different PGPRs individually and consortium under control and drought stress conditions.


Treatment	SH (cm)/pot	RL (cm)/pot	No. of leaves/pot	SDW (g)/pot	RDW (g)/pot

Control	38.3 ± 2.9ⁱ	10.0 ± 2.6^i-k	14.0 ± 2.6^f-i	0.9 ± 0.2^jk	0.12 ± 0.01^jk
Control + D	31.7 ± 2.1^j	7.0 ± 2.6^k	9.3 ± 1.5^j	0.6 ± 0.1^k	0.1 ± 0.02^k
BS-27	50.7 ± 0.6^d	14.0 ± 2^f-h	17.3 ± 1.2^c-e	1.9 ± 0.4^b-e	0.4 ± 0.06^d-i
BS-27 +D	43.3 ± 1.5^f-h	11.0 ± 1^h-j	11.0 ± 2^ij	1.5 ± 0.2^e-i	0.3 ± 0.04^g-j
FB-50	52.0 ± 2.6^d	17.7 ± 1.5^b-e	18.0 ± 3^b-e	1.9 ± 0.3^b-e	0.4 ± 0.11^d-i
FB-50 +D	46.3 ± 3.1^ef	11.7 ± 2.1^h-j	15.7 ± 2.5^d-g	1.7 ± 0.1^g-j	0.5 ± 0.05^g-i
RS-65	46.7 ± 3.2^ef	16.0 ± 1^d-f	21.3 ± 3.1^ab	1.5 ± 0.4^e-i	0.3 ± 0.09^e-i
RS-65 +D	39.3 ± 2.5^hi	11.0 ± 2^h-j	18.0 ± 2^b-e	1.1 ± 0.2^ij	0.2 ± 0.05^j-k
FB-49	61.0 ± 1.7^b	20.3 ± 1.5^ab	21.3 ± 2.1^ab	2.2 ± 0.4^bc	0.60.03^bc
FB-49 +D	51.7 ± 1.5^d	18.7 ± 1.5^b-d	17.7 ± 1.5^c-e	1.8 ± 0.1^d-h	0.55 ± 0.07^c-f
RS-72	51.7 ± 2.1^d	16.7 ± 1.5^c-f	18.3 ± 2.5^b-d	2.1 ± 0.4^b-d	0.5 ± 0.12^cd
RS-72 +D	44.0 ± 2^fg	11.3 ± 1.5^h-j	13.7 ± 1.5^f-i	1.3 ± 0.1^g-i	0.4 ± 0.1^e-h
BS-19	48.3 ± 1.5^de	14.0 ± 1^f-h	18.7 ± 3.1^b-d	2.2 ± 0.3^bc	0.5 ± 0.14^c-e
BS-19 +D	40.3 ± 2.5^g-i	10.3 ± 1.5^ij	13.0 ± 2^j-i	1.6 ± 0.3^d-h	0.4 ± 0.04^d-f
RS-79	43.3 ± 2.5^f-h	12.7 ± 2.1^g-i	15.3 ± 1.5^d-g	1.9 ± 0.3^c-f	0.4 ± 0.11^d-h
RS-79 +D	39.3 ± 1.5^hi	8.7 ± 1.5^jk	11.3 ± 1.5^i-j	1.4 ± 0.2^f-i	0.3 ± 0.08^g-j
PS-16	46.0 ± 2^ef	11.0 ± 1^h-j	20.3 ± 2.5^bc	1.8 ± 0.5^c-f	0.3 ± 0.12^g-i
PS-16 +D	39.7 ± 2.5^hi	8.4 ± 2.1^jk	15.7 ± 2.5^d-g	1.4 ± 0.2^g-i	0.2 ± 0.06^g-j
BS-45	51.0 ± 2^d	11.3 ± 1.5^h-j	14.7 ± 1.5^e-h	2.4 ± 0.2^b	0.4 ± 0.15^d-i
BS-45 +D	42.7 ± 2.1^f-h	9.3 ± 1.5^i-k	11.0 ± 1^ij	1.4 ± 0.1^g-i	0.2 ± 0.08^h-k
PS-2	41.3 ± 1.5^g-i	10.0 ± 1^i-k	18.3 ± 1.5^b-d	1.4 ± 0.1^g-i	0.2 ± 0.07^g-j
PS-2 +D	38.7 ± 2.1ⁱ	8.3 ± 1.5^jk	11.7 ± 2.1^h-j	1.2 ± 0.1^h-i	0.2 ± 0.02^i-k
Consortia	70.3 ± 1.5^a	22.3 ± 2.1^a	23.7 ± 1.5^a	2.9 ± 0.3^a	0.9 ± 0.12^a
Consortia +D	57.3 ± 1.5^c	19.3 ± 2.5^bc	16.7 ± 2.8^d-f	2.1 ± 0.2^b-d	0.8 ± 0.07^ab

Means with the same letter down the column are not significantly different at () by using DMRT. Mean ± SD (n = 3); D represents drought. Consortia = FB-50 + BS-27 + BS-19 + FB-49. SH = shoot height, RL = root length, SDW = shoot dry weight, RDW = root dry weight.