Environmental Science and Engineering PhD Program , The University of Texas at El Paso , 500 West University Avenue , El Paso , Texas 79968 , United States.
University of California Center for Environmental Implications of Nanotechnology (UC CEIN) , The University of Texas at El Paso , 500 West University Avenue , El Paso , Texas 79968 , United States.
J Agric Food Chem. 2020 Feb 19;68(7):1986-1997. doi: 10.1021/acs.jafc.9b06840. Epub 2020 Feb 5.
In this study, the impact of cerium oxide nanoparticles on the nutritional value of tomato () fruit grown in soil infested with f. sp. was investigated in a greenhouse pot study. Three-week old seedlings of Bonny Best tomato plants were exposed by foliar and soil routes to nanoparticle CeO (NP CeO) and cerium acetate (CeAc) at 0, 50, and 250 mg/L and transplanted into pots containing a soil mixture infested with the wilt pathogen. Fruit biomass, water content, diameter, and nutritional content (lycopene, reducing and total sugar) along with elemental composition, including Ce, were evaluated. Fruit Ce concentration was below the detection limit in all treatments. Foliar exposure to NP CeO at 250 increased the fruit dry weight (67%) and lycopene content (9%) in infested plants, compared with the infested untreated control. Foliar exposure to CeAc at 50 mg/L reduced fruit fresh weight (46%) and water content (46%) and increased the fruit lycopene content by 11% via root exposure as compared with the untreated infested control. At 250 mg/L, CeAc increased fruit dry weight (94%), compared with the infested untreated control. Total sugar content decreased in fruits of infested plants exposed via roots to NP CeO at 50 mg/kg (63%) and 250 mg/kg (54%), CeAc at 50 mg/kg (46%), and foliarly at 50 mg/L (50%) and 250 mg/L (50%), all compared with the infested untreated control. Plants grown in -infested soil had decreased fruit dry weight (42%) and lycopene content (17%) and increased total sugar (60%) and Ca content (140%), when compared with the noninfested untreated control ( ≤ 0.05). Overall, the data suggested minimal negative effects of NP CeO on the nutritional value of tomato fruit while simultaneously suppressing wilt disease.
在这项研究中，温室盆栽研究调查了在受 f. sp. 侵染的土壤中种植的番茄（）果实中氧化铈纳米颗粒对其营养价值的影响。Bonny Best 番茄植株的三周龄幼苗通过叶片和土壤途径暴露于纳米颗粒 CeO（NP CeO）和醋酸铈（CeAc）中，浓度分别为 0、50 和 250mg/L，然后移植到含有受萎蔫病病原体侵染的土壤混合物的盆中。评估了果实生物量、含水量、直径和营养成分（番茄红素、还原糖和总糖）以及包括 Ce 在内的元素组成。所有处理的果实 Ce 浓度均低于检测限。与受侵染未处理的对照相比，叶面施NP CeO 250mg/L 增加了受侵染植物果实的干重（67%）和番茄红素含量（9%）。与受侵染未处理的对照相比，叶面施 CeAc 50mg/L 通过根系暴露降低了果实鲜重（46%）和含水量（46%），并使果实番茄红素含量增加了 11%。与受侵染未处理的对照相比，250mg/L 的 CeAc 增加了果实干重（94%）。受侵染植物的果实中，根系暴露于 50mg/kg NP CeO（63%）和 250mg/kg NP CeO（54%）、50mg/kg CeAc（46%）以及叶面暴露于 50mg/L CeAc（50%）和 250mg/L CeAc（50%）时，总糖含量均降低，与受侵染未处理的对照相比，所有处理均降低了果实干重（42%）和番茄红素含量（17%），增加了总糖（60%）和 Ca 含量（140%）。与非侵染未处理的对照相比（≤0.05）。总的来说，数据表明 NP CeO 对番茄果实的营养价值的负面影响较小，同时抑制了萎蔫病。
