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

Table 6

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

	Mg	Ca	K	S	P	Al	Si
Control
Non-inoculated	9210.8^bc	13098.3^b	295.3^bc	44.4^b	ND	1204.2^ab	661^ab
P. putida KT2440	11285.8^ab	5385.6^c	402.4^ab	74.4^a	29.3^a	1633.2^a	431.3^bc
P. fluorescens SBW25	14039.6^a	18557.7^a	501.5^a	76.9^a	ND	927.9b^c	932.5^a
NaCl 200 mM
Non-inoculated	1056.7^e	184.3^d	36.4^f	6.3^e	ND	435.1^cd	5^e
P. putida KT2440	1771.7^e	213.6^d	44.2^f	8.3^e	0.12^c	682.3^bcd	26^e
P. fluorescens SBW25	3411.6^de	257.5^cd	45.1^f	7.3^e	ND	926.7^bc	18.8^e
NaCl 1000 mM
Non-inoculated	2946.8^de	725.8^cd	84.4^def	24.5^cd	9.4^b	307.9^d	80.8^de
P. putida KT2440	11107.9^ab	2947.6^cd	401.6^ab	64.6^a	ND	798.4^bcd	367.8^bcd
P. fluorescens SBW25	3742.3^de	1586.8^cd	121.1^def	26.3^cd	15.3^b	490.4^cd	120.8^de
Drought
Non-inoculated	4233.5^de	1286.8^cd	78^ef	13.9^de	ND	413.3^cd	90.6^de
P. putida KT2440	5789.9^d	2502.9^cd	191^cd	44.6^b	17.5^b	892.9^bc	164.8^cde
P. fluorescens SBW25	5973.9^c	1709.5^cd	181.8^de	30.7^bc	17.4^b	570^cd	148.7^cde

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