Plant Growth-Promoting Rhizobacteria (PGPR) Reduce Adverse Effects of Salinity and Drought Stresses by Regulating Nutritional Profile of Barley

Table 7

Effect of PGPR on micronutrients of barley roots under salinity and drought stress conditions.

	Cl	Mn	Fe	Co	Ni	Cu	Zn
Control
Non-inoculated	12.1^abc	72.3^c	278.2^c	0.8^bcd	0.679^a	0.95^bc	355.8^b
P. putida KT2440	7.4^c	94.2^b	325.3^bc	1.2^a	0.0681^de	1.3^ab	357^b
P. fluorescens SBW25	9.8^bc	121.2^a	457.1^a	0.96^abc	0.516^b	1.5^a	494.2^a
NaCl 200 mM
Non-inoculated	8.9^bc	5.9^f	34^e	0.14^f	0.039^de	0.06^f	27.5^d
P. putida KT2440	7.7^c	6.3^f	57.7^de	0.18^f	0.042^de	0.08^ef	28^d
P. fluorescens SBW25	6.3^c	6.6^f	54.5^de	0.16^f	0.041^de	0.1^ef	35.1^d
NaCl 1000 mM
Non-inoculated	15.2^abc	22.6^f	60.5^de	0.141^f	0.058^de	0.21^def	52.2^d
P. putida KT2440	7.6^c	74.4^c	410.1^ab	1.1^ab	0.35^c	1.1^ab	504.3^a
P. fluorescens SBW25	26.7^ab	45^d	89.2^de	0.26^ef	0.084^de	0.43^def	64.1^cd
Drought
Non-inoculated	13.5^abc	22.8^ef	41.8^de	0.125^f	0.12^d	0.3^def	48.9^d
P. putida KT2440	29.5^a	40.2^de	154.9^d	0.618^cde	0.32^c	0.59^cd	179.3^c
P. fluorescens SBW25	25.8^ab	50.4^d	158.4^d	0.499^def	ND	0.47^de	129^cd

ND: not detected. Means (n = 3). Different letters show a significant difference at . Unit: mg/kg.