吲哚-3-乙酸对氧化铜纳米颗粒毒性对绿豆（菜豆科）的调控作用。
Modulation of CuO nanoparticles toxicity to green pea (Pisum sativum Fabaceae) by the phytohormone indole-3-acetic acid.
机构信息
Environmental Science Master's Program, Geology Department, The University of Texas at El Paso, El Paso, TX 79968, United States.
Department of Chemistry, The University of Texas at El Paso, 500 W. University Avenue, El Paso, TX 79968, United States; University of California Center for Environmental Implications of Nanotechnology (UC CEIN), The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, United States.
出版信息
Sci Total Environ. 2017 Nov 15;598:513-524. doi: 10.1016/j.scitotenv.2017.04.063. Epub 2017 Apr 25.
The response of plants to copper oxide nanoparticles (nano-CuO) in presence of exogenous phytohormones is unknown. In this study, green pea (Pisum sativum) plants were cultivated to full maturity in soil amended with nano-CuO (10-100nm, 74.3% Cu), bulk-CuO (bCuO, 100-10,000nm, 79.7% Cu), and CuCl at 50 and 100mg/kg and indole-3-acetic acid (IAA) at 10 and 100μM. Results showed that IAA at 10 and 100μM, averaged over all Cu treatments, reduced the number of plants by ~23% and ~34%, respectively. IAA at 10μM, nano-CuO at 50mg/kg, b-CuO at 50mg/kg, and CuCl at 100mg/kg reduced pod biomass by about 50%. Although some combinations of IAA, mainly at 100μM, with the Cu compounds altered nutrient accumulation in tissues, none of them affected pod elements. Conversely, without IAA, nano-CuO at 50mg/kg, increased pod Fe and Ni by 258% and 325%, respectively, while bCuO at 100mg/kg increased pod Ni by 275%, compared with control. With IAA at 10μM, nano-CuO (100mg/kg) and bCuO (50mg/kg) increased stem Cu by ~84% and ~78%. When IAA increased to 100μM, nano-CuO and bCuO reduced stem Ca by 32% and 37%, and Mg by ~35%. Results suggest that both the nano-CuO and bCuO could improve the nutritional quality of pea pods, while exogenous IAA combined with Cu-based compounds could impact green pea production since these treatments reduced the number of plants and pod biomass.
植物对铜氧化物纳米颗粒（nano-CuO）在外源植物激素存在下的反应尚不清楚。在这项研究中，在添加纳米氧化铜（10-100nm，74.3%Cu）、块状氧化铜（bCuO，100-10000nm，79.7%Cu）和 CuCl 的土壤中种植完全成熟的豌豆（Pisum sativum）植株，浓度分别为 50 和 100mg/kg，吲哚-3-乙酸（IAA）浓度为 10 和 100μM。结果表明，IAA 在 10 和 100μM 时，平均所有 Cu 处理下，分别减少了约 23%和 34%的植物数量。IAA 在 10μM，纳米氧化铜在 50mg/kg，b-CuO 在 50mg/kg 和 CuCl 在 100mg/kg 下，豆荚生物量减少了约 50%。虽然 IAA 与 Cu 化合物的一些组合主要在 100μM 时改变了组织中的养分积累，但它们都没有影响豆荚的元素。相反，没有 IAA，纳米氧化铜在 50mg/kg 时，分别增加了 258%和 325%的豆荚铁和镍，而 bCuO 在 100mg/kg 时增加了 275%的豆荚镍，与对照相比。当 IAA 为 10μM 时，纳米氧化铜（100mg/kg）和 bCuO（50mg/kg）增加了约 84%和 78%的茎 Cu。当 IAA 增加到 100μM 时，纳米氧化铜和 bCuO 降低了茎 Ca 约 32%和 37%，以及约 35%的 Mg。结果表明，纳米氧化铜和 bCuO 均可提高豌豆豆荚的营养价值，而外源 IAA 与 Cu 基化合物结合使用可能会影响豌豆的产量，因为这些处理减少了植物数量和豆荚生物量。
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