Department of Pure and Applied Chemistry, Osun State University, Osogbo, Nigeria.
Department of Science Laboratory Technology, Federal Polytechnic Ilaro, Ilaro, Nigeria.
Bull Environ Contam Toxicol. 2022 Nov;109(5):893-899. doi: 10.1007/s00128-022-03594-4. Epub 2022 Aug 22.
The effects of a silver nanoparticles (AgNPs)-cow-dung combination on Abelmoschus esculentus physiology, enzyme activities, heavy metal bioaccumulation, and micronutrients were investigated. A. esculentus seedlings were nurtured with foliar application of water, 0.75 mg/L each of AgNPs, cow-dung and AgNPs-cow dung till maturity. AgNPs-cow dung inhibited root and shoot lengths by 12.9% and 24.8%, respectively as opposed to elongation recorded for individual application compared to the control. In contrast to the promotion of photosynthesis, enzyme and antioxidant activities by individual applications, AgNPs-cow dung suppressed more than 50% of these parameters. Implied toxicities of AgNPs-cow dung on A. esculentus manifested in increased malondialdehyde contents with concomitant higher bioaccumulation factor of heavy metals. Cow-dung and AgNPs each stimulated A. esculentus activities in different ways, but their combination was inhibitory, which may be ascribed to the transformed AgNPs in cow-dung and relative availability of toxic metals.
研究了银纳米粒子（AgNPs）-牛粪混合物对蕹菜生理、酶活性、重金属生物积累和微量元素的影响。蕹菜幼苗用叶面喷施水、0.75mg/L 的 AgNPs、牛粪和 AgNPs-牛粪混合物培养至成熟。与对照相比，AgNPs-牛粪混合物分别抑制了根系和茎的生长 12.9%和 24.8%，而单独施用时则记录到伸长。与单独施用时促进光合作用、酶和抗氧化剂活性相反，AgNPs-牛粪混合物抑制了这些参数的 50%以上。AgNPs-牛粪对蕹菜的潜在毒性表现为丙二醛含量增加，同时重金属的生物积累因子更高。牛粪和 AgNPs 以不同的方式刺激蕹菜的活性，但它们的组合是抑制性的，这可能归因于牛粪中转化的 AgNPs 和有毒金属的相对可用性。
