Raliya Ramesh, Nair Remya, Chavalmane Sanmathi, Wang Wei-Ning, Biswas Pratim
Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri-63130, USA.
Metallomics. 2015 Dec;7(12):1584-94. doi: 10.1039/c5mt00168d. Epub 2015 Oct 14.
Sustainable use of nanotechnology for agricultural practice requires an understanding of the plant's life cycle and potential toxicological impacts of nanomaterials. The main objective of this study was to compare the impact of TiO2 and ZnO nanoparticles of similar size (25 ± 3.5 nm) over a range of concentrations (0 to 1000 mg kg(-1)) on translocation and accumulation of nanoparticles in different plant sections; as well as to establish physiological impact on tomato plants. The results indicated that there is a critical concentration of TiO2 and ZnO nanoparticles upto which the plant's growth and development are promoted; with no improvement beyond that. Aerosol mediated application was found to be more effective than the soil mediated application on the uptake of the nanoparticles was in plants. A mechanistic description of nanoparticle uptake, translocation and resultant plant response is unraveled. The present investigation demonstrates the concept of nanoparticle farming by understanding plant - nanoparticle interaction and biodistribution.
纳米技术在农业实践中的可持续应用需要了解植物的生命周期以及纳米材料潜在的毒理学影响。本研究的主要目的是比较相似尺寸（25±3.5纳米）的二氧化钛和氧化锌纳米颗粒在一系列浓度（0至1000毫克/千克）下对纳米颗粒在不同植物部位的转运和积累的影响；以及确定对番茄植株的生理影响。结果表明，存在二氧化钛和氧化锌纳米颗粒的临界浓度，在此浓度之前植物的生长发育会得到促进；超过该浓度则无改善。发现气溶胶介导的施用在植物对纳米颗粒的吸收方面比土壤介导的施用更有效。揭示了纳米颗粒吸收、转运及由此产生的植物反应的机制描述。本研究通过了解植物 - 纳米颗粒相互作用和生物分布，展示了纳米颗粒种植的概念。
