Plant Growth-Promoting Rhizobacteria Improve Growth, Morph-Physiological Responses, Water Productivity, and Yield of Rice Plants Under Full and Deficit Drip Irrigation

Rice

Table 7 Effect of integrative of deficit drip irrigation and plant growth promoting rhizobacteria on plant water status (MSI% and RWC %), chlorophyll fluorescence (Fv/Fm and PI) SPAD value, chlorophyll a and chlorophyll a of rice plants grown saline soil for (SI) 2016/2017 and (SII) 2017/2018 seasons

Source of variation	Fv/Fm	Performance index (%)	SPAD chlorophyll	Chlorophyll a	Chlorophyll b
Season	NS	*	NS	NS	NS
(SI) 2017	0.79 ± 0.01a	4.33 ± 0.63a	42.83 ± 1.50a	0.41 ± 0.02a	0.31 ± 0.00a
(SII) 2018	0.80 ± 0.01a	3.75 ± 0.55b	43.55 ± 1.36a	0.39 ± 0.01a	0.29 ± 0.02a
Irrigation	**	**	**	**	**
FI	0.81 ± 0.01a	4.88 ± 0.54a	45.23 ± 0.66a	0.42 ± 0.01a	0.32 ± 0.00a
DI	0.79 ± 0.01b	3.20 ± 0.43b	41.15 ± 1.20b	0.39 ± 0.01b	0.28 ± 0.01b
PGPR	**	**	**	**	**
⁻PGPR	0.78 ± 0.02b	3.03 ± 0.45b	40.40 ± 0.82b	0.38 ± 0.00b	0.28 ± 0.00b
⁺PGPR	0.82 ± 0.01a	5.05 ± 0.32a	45.98 ± 0.76a	0.42 ± 0.01a	0.32 ± 0.02a
I × PGPR	**	**	**	**	**
I₁₀₀ × ⁻PGPR	0.79 ± 0.01b	3.95 ± 0.43b	43.00 ± 0.75b	0.40 ± 0.02b	0.31 ± 0.01ab
I₈₀ × ⁻PGPR	0.76 ± 0.02c	2.10 ± 0.24c	37.80 ± 0.53c	0.37 ± 0.00c	0.26 ± 0.00c
I₁₀₀ × ⁺PGPR	0.82 ± 0.01a	5.80 ± 0.24a	47.45 ± 0.51a	0.43 ± 0.01a	0.33 ± 0.02a
I₈₀ × ⁺PGPR	0.81 ± 0.01a	4.30 ± 0.32b	44.50 ± 0.67b	0.41 ± 0.01ab	0.30 ± 0.01b

*,**respectively, differences at p ≤ 0.05 and p ≤ 0.01 probability level, ns indicates no significant difference. Means followed by the same letter in each column are not significantly different according to the LSD test (p < 0.05)