Effects of foliar application of salicylic acid and nitric oxide in alleviating iron deficiency induced chlorosis of Arachis hypogaea L.

Botanical Studies

Table 3 Effects of exogenous SA and NO on the net photosynthetic (Pn), transpiration rate (Tr), Fo, Fv/Fm and ΦPSII of leaves

Treatments	Pn [μmol m^-2·s^-1]	Tr [mmol m^-2·s-¹]	Fo	Fv/Fm	ΦPSII
CK	10.78 ± 1.14e	0.88 ± 0.11e	82.44 ± 1.71c	0.805 ± 0.04b	0.439 ± 0.02c
EDTA-Fe	16.07 ± 0.98d	1.15 ± 0.03d	95.78 ± 0.69b	0.873 ± 0.04a	0.535 ± 0.02a
SA	18.65 ± 0.86c	1.64 ± 0.07c	97.78 ± 1.07b	0.843 ± 0.04ab	0.483 ± 0.01b
SNP	18.72 ± 0.85c	1.79 ± 0.22c	97.67 ± 0.58b	0.858 ± 0.01a	0.468 ± 0.02b
SA+SNP	24.89 ± 1.24a	4.26 ± 0.15a	104.33 ± 3.79a	0.874 ± 0.01a	0.557 ± 0.02a
1/2(SA+SNP)	24.82 ± 0.65b	3.99 ± 0.18b	100.33 ± 4.51ab	0.865 ± 0.01a	0.466 ± 0.01bc

CK: hydroponic systems; EDTA-Fe: Hoagland nutrient solution containing 0.1 mM EDTA-Fe; SA: hydroponic systems and foliar application of 1.0 mM SA; SNP: hydroponic systems and foliar application of 2.5 mM SNP; SA+SNP: hydroponic systems and foliar application of 1.0 mM SA and 2.5 mM SNP; 1/2(SA+SNP): hydroponic systems and foliar application of 0.5 mM SA and 1.25 mM SNP. Different lower case letters in the same line indicate a significant difference (P < 0.05) between different treatments. Data are means ± SD of three replicate samples per treatment.