ABSTRACT

This study was conducted to investigate oxidative stress and physiological deficiencies from naphthalene toxicity on Moringa oleifera and adsorptive properties of silver nanoparticles (AgNPs) to alleviate the deficiencies. Naphthalene contents in soil and M. oleifera were quantified with gas chromatography coupled with flame ionisation detector (GC-FID). M. oleifera was planted on 0.35 mgNaph/g soil, 0.30 mgNaph/g soil, 0.25 mgNaph/g soil, 0.30 mgNaph + 0.30 mg AgNPs/g soil and 0.30 mg AgNPs/g soil symbolised as groups B, C, D, E and F, respectively, while group A was control (water). Naphthalene significantly retarded M. oleifera growth parameters, declined stress tolerance capacity and created water deficit. It induced oxidative stress by increasing malondialdehyde contents and compromised antioxidant activities by 69.64%, 45.27% and 39.38% in M. oleifera planted on B, C and D, respectively. Naphthalene declined photosynthetic indicators in M. oleifera by 60.69%, 52.41%, 29.66% in B, C and D, respectively. AgNPs noticeably reduced naphthalene toxicity on antioxidant activity, photosynthetic pigment, translocation into M. oleifera and retention in soil by 21.36%, 79.31%, 65.83% and 89.59%, respectively. Results in this study indicate AgNPs possess the ability to alleviate oxidative stress triggered by naphthalene toxicity.

摘要

进行这项研究以研究氧化毒性和萘毒性对辣木的生理缺陷以及银纳米颗粒（AgNPs）的吸附性能以减轻缺陷。用气相色谱-火焰离子检测器（GC-FID）对土壤和油橄榄中的萘含量进行定量。辣木种植0.35 mgNaph /克土壤，0.30 mgNaph /克土壤，0.25 mgNaph /克土壤，0.30 mgNaph + 0.30毫克的AgNPs /克土壤和0.30毫克的AgNPs符号为基团B，C，d，E /克土壤和F分别为A组为对照组（水）。萘显着延缓油橄榄生长参数，耐压力能力下降并造成缺水。它通过增加丙二醛含量来诱导氧化胁迫，并分别在B，C和D上种植的油茶M. oleifera中降低了69.64％，45.27％和39.38％的抗氧化活性。萘在油菜中的光合作用指标分别下降了60.69％，52.41％，29.66％。AgNPs分别显着降低了萘对抗氧化剂活性，光合色素，易位至油茶和在土壤中的保留的毒性，分别降低了21.36％，79.31％，65.83％和89.59％。这项研究的结果表明，AgNP具有减轻萘毒性触发的氧化应激的能力。