Zero-valent silver nanoparticles attenuate Cd and Pb toxicities on Moringa oleifera via immobilization and induction of phytochemicals.
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ID: 85265
2019
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Abstract
Potentials of zero-valent extract of cocoa pod mediated silver nanoparticles (AgNPs) for heavy metals (cadmium and lead) immobilization, attenuation of induced toxicities and influence on phytochemical contents in Moringa oleifera were investigated. M. oleifera seeds were planted in soil spiked and watered with water (control), 0.2 mg AgNPs, 0.5 mg CdCl, 0.5 mg PbCl, 0.2 mg AgNPs + 0.5 mg CdCl, 0.2 mg AgNPs + 0.5 mg PbCl, 0.2 mg AgNPs + 0.75 mg CdCl and 0.2 mg AgNPs + 0.75 mg PbCl per g soil designated as groups A, B, C, D, E, F, G and H respectively. Significant (p < 0.05) repression in shoot and root lengths, percentage germination, number of leaves, vigour and growth tolerance indices, relative water contents with attendant inhibition of photosynthetic pigments, total carotenoid contents, total flavonoid contents and total phenolic contents were obtained for M. oleifera planted on Cd and Pb spiked soil. There were marked decrease in ferric reducing, hydrogen peroxide scavenging and free radical scavenging activities with resultant significant increase in lipid peroxidation (MDA) levels for M. oleifera grown on Cd and Pb treated soil compared to control with Pb having more deleterious effects. Conversely, AgNPs significantly enhanced both physiological and biochemical parameters in M. oleifera over control and considerably attenuated suppressions of these parameters in M. oleifera induced by Cd and Pb. Results in this study have shown AgNPs as excellent immobilizing agents and outstanding modulators of heavy metal induced toxicities.
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| Reference Key |
azeez2019zerovalentplant
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| Authors | Azeez, Luqmon;Adejumo, Ayoade L;Lateef, Agbaje;Adebisi, Segun A;Adetoro, Rasheed O;Adewuyi, Sulaimon O;Tijani, Kazeem O;Olaoye, Samuel; |
| Journal | Plant physiology and biochemistry : PPB |
| Year | 2019 |
| DOI |
S0981-9428(19)30120-2
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| URL | |
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