Effects of exogenous nitric oxide on mineral nutrition and some physiological parameters in maize grown under salinity stress
2014
Celik, A.
In the present thesis work, the effect of nitric oxide (NO) on growth, mineral nutrients contentrations and some physiological properties of maize under salt stress condition was investigated. For this propose, 40 mM NaCl (except control), exogenously applied sodium nitroprussid (SNP) as a NO donor, and methylene blue (MB), as a NO scavenger, (0, 0.5 and 1.0 mM) were supplied. Results of this study showed that, NaCl and SNP applications were significantly decreased plant fresh and dry weight compared control. Membrane permeability, lipid peroxidation, measured in terms of malondialdehyde (MDA) content, excised-leaf water loss, and relative water content, stomatal resistance and proline accumulation were not affected by NaCl and SNP treatments. Nitrogen, P, Cl, Na, Mg, Fe, Zn, Cu and Mn concentrations of maize plant were significantly affected, however no significant effect on the K and Ca concentrations of maize plant was observed. Nitrogen, Na, Cl, Na, K, Ca, Mg, Fe, Zn and Mn concentrations were increased by increasing levels of SNP. The results of this study indicated that high doses (0.5 mM and 1.0 mM) of exogenously applied sodium nitroprusside (SNP), as a NO donor, have not positive effect to improve plant performance aganist salinity stress.
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