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

Botanical Studies

Table 4 Effects of exogenous SA and NO on the Fe concentration, active Fe content and Fe (III)- chelate reductase activity

Treatments	Fe concentration (mg kg^-1DW)			Active Fe content (mg kg^-1FW)	Fe(III)- chelate reductase acticity (μmol g^-12 h^-1FW)
Treatments	Roots	Stems	Leaves	Active Fe content (mg kg^-1FW)	Fe(III)- chelate reductase acticity (μmol g^-12 h^-1FW)
CK	852.07 ± 2.92e	118.33 ± 9.09d	125.11 ± 9.20e	33.45 ± 1.10f	3.12 ± 0.09d
EDTA-Fe	1382.71 ± 8.49a	172.34 ± 8.52b	155.36 ± 2.48d	50.02 ± 0.81e	2.82 ± 0.09e
SA	865.35 ± 18.99e	160.84 ± 4.47c	159.24 ± 9.64d	51.56 ± 0.25d	3.35 ± 0.02c
SNP	916.50 ± 2.89d	168.33 ± 4.62bc	183.34 ± 5.20c	53.42 ± 0.56c	3.37 ± 0.07c
SA+SNP	1173.14 ± 12.91b	183.89 ± 4.61a	264.92 ± 4.63a	64.06 ± 0.49a	4.00 ± 0.12a
1/2(SA+SNP)	1022.90 ± 8.78c	173.96 ± 5.12ab	227.15 ± 9.77b	61.30 ± 0.70b	3.74 ± 0.06b

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.