کلیدواژهها
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Carbon nanomaterials, Nanotechnology, Photosynthetic pigment, Plant stress, Antioxidant enzyme activity
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چکیده
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Salinity stress is of the critical abiotic stress factors in many parts of the world, especially in arid and semi-arid
regions and drastically decrease the growth and productivity of the crop. Therefore, in order to maintain the crop
productivity and ensure food security in salt-stress suffered regions; in the last decade, novel engineered
nanoparticles were synthesized and then assayed for their potential effects concerned with the plant protection
against stress conditions. Herewith the present study, we synthesized proline-functionalized graphene oxide
nanoparticles (GO-Pro NPs). Then, the interaction effects of either GO-Pro NPs (50 and 100 mg L− 1) or graphene
oxide nanoparticles (50 and 100 mg L− 1) and salinity stress (50 and 100 mM NaCl) on Vitis vinifera L. cv Sultana
were evaluated by assaying an array of parameters, viz. photosynthetic pigments, electrolyte leakage, relative
leaf water content, protein, proline, antioxidant defense systems, and oxidative stress markers. Accordingly,
salinity critically reduced chlorophyll index and content as well as leaf water content, whilst it caused significant
increases in electrolyte leakage, the enzyme activity of superoxide dismutase (SOD) as well as contents of proline,
malondialdehyde (MDA) and hydrogen peroxide (H2O2). In stress-submitted plants, foliar application of prolinefunctionalized graphene oxide nanoparticles (100 mM) was effective against oxidative damage with increasing
the activity of antioxidant enzymes, proline, and the relative water content of leaves and reducing electrolyte
leakage (EL), H2O2, and MDA. The current findings revealed that the oxidative stress caused by salinity in
Sultana cultivar grapes might be alleviated by foliar application of different levels of proline-functionalized
graphene nanoparticles
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