Zero-valent silver nanoparticles attenuate Cd and Pb toxicities on Moringa oleifera via immobilization and induction of phytochemicals.

Autor: Azeez L; Department of Pure and Applied Chemistry, Osun State University, Osogbo, Nigeria. Electronic address: luqman.azeez@uniosun.edu.ng., Adejumo AL; Department of Pure and Applied Chemistry, Osun State University, Osogbo, Nigeria., Lateef A; Nanotechnology Research Group (NANO(+)), Laboratory of Industrial Microbiology and Nanobiotechnology, Department of Pure and Applied Biology, Ladoke Akintola University of Technology, PMB, 4000, Ogbomoso, Nigeria., Adebisi SA; Department of Pure and Applied Chemistry, Osun State University, Osogbo, Nigeria., Adetoro RO; Department of Pure and Applied Chemistry, Osun State University, Osogbo, Nigeria., Adewuyi SO; Department of Chemistry, Federal University Oye, Ekiti State, Nigeria., Tijani KO; Department of Chemical Sciences, Fountain University, Osogbo, Nigeria., Olaoye S; Department of Pure and Applied Chemistry, Osun State University, Osogbo, Nigeria.
Jazyk: angličtina
Zdroj: Plant physiology and biochemistry : PPB [Plant Physiol Biochem] 2019 Jun; Vol. 139, pp. 283-292. Date of Electronic Publication: 2019 Mar 22.
DOI: 10.1016/j.plaphy.2019.03.030
Abstrakt: 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 2 , 0.5 mg PbCl 2 , 0.2 mg AgNPs + 0.5 mg CdCl 2 , 0.2 mg AgNPs + 0.5 mg PbCl 2 , 0.2 mg AgNPs + 0.75 mg CdCl 2 and 0.2 mg AgNPs + 0.75 mg PbCl 2 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.
(Copyright © 2019 Elsevier Masson SAS. All rights reserved.)
Databáze: MEDLINE
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