CuO and ZnO Nanoparticles Modify Interkingdom Cell Signaling Processes Relevant to Crop Production
CuO and ZnO Nanoparticles Modify Interkingdom Cell Signaling Processes Relevant to Crop Production
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DOI：
10.1021/acs.jafc.7b01302
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发表时间：
2018-07-04
影响因子：
6.1
通讯作者：
Britt, David W.
中科院分区：
文献类型：
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作者：
Anderson, Anne J.;McLean, Joan E.;Britt, David W.
随着世界人口的增加，需要可持续农业战略来满足全球对粮食和其他商业产品的植物需求。纳米颗粒配方很可能成为发展战略的一部分。氧化铜和氧化锌纳米颗粒（NPs）具有作为肥料的潜力，因为它们提供了生物可利用的必需金属；由于其剂量依赖性毒性，它们也具有作为杀虫剂的潜力。本文就这些金属氧化物NPs对根际功能的影响作一综述。在>= 10 mg金属/kg剂量下，这些NPs改变了根相关微生物绿假单胞菌O6中参与植物保护的关键代谢物的产生。在微生物中，苯那嗪类化合物的合成发生了改变，苯那嗪类化合物的合成在植物抵抗病原体中起作用，吡啶类铁载体的合成提高了根际铁的生物利用度，吲哚-3-乙酸的合成影响了植物的生长。在小麦幼苗中，根形态的重编程涉及根毛增殖（CuO NPs）和侧根形成（ZnO NPs）的增加。小麦茎部基因表达的系统性变化表明，小麦对金属胁迫恢复能力的调节发生了改变，同时也有可能在田间常见的胁迫下提高生存能力。这些对NPs的反应跨越了细菌、真菌和根际植物的界。我们面临的挑战是学习如何理解这些潜在变化的价值，并成功地制定作物根际中最佳活性的NPs。这些配方可纳入发展实践，以确保作物生产的可持续性。
As the world population increases, strategies for sustainable agriculture are needed to fulfill the global need for plants for food and other commercial products. Nanoparticle formulations are likely to be part of the developing strategies. CuO and ZnO nanoparticles (NPs) offer potential as fertilizers, as they provide bioavailable essential metals, and as pesticides, because of dose-dependent toxicity. Effects of these metal oxide NPs on rhizosphere functions are the focus of this review. These NPs at doses of >= 10 mg metal/kg change the production of key metabolites involved in plant protection in a root-associated microbe, Pseudomonas chlororaphis O6. Altered synthesis occurs in the microbe for phenazines, which function in plant resistance to pathogens, the pyoverdine-like siderophore that enhances Fe bioavailability in the rhizosphere and indole-3-acetic acid affecting plant growth. In wheat seedlings, reprogramming of root morphology involves increases in root hair proliferation (CuO NPs) and lateral root formation (ZnO NPs). Systemic changes in wheat shoot gene expression point to altered regulation for metal stress resilience as well as the potential for enhanced survival under stress commonly encountered in the field. These responses to the NPs cross kingdoms involving the bacteria, fungi, and plants in the rhizosphere. Our challenge is to learn how to understand the value of these potential changes and successfully formulate the NPs for optimal activity in the rhizosphere of crop plants. These formulations may be integrated into developing practices to ensure the sustainability of crop production.