Nair Remya, Mohamed M Sheikh, Gao Wei, Maekawa Toru, Yoshida Yasuhiko, Ajayan Pulickel M, Kumar D Sakthi
Bio Nano Electronics Research Center, Graduate School of Interdisciplinary New Science, Toyo University, Kawagoe, Saitama-350-8585, Japan.
J Nanosci Nanotechnol. 2012 Mar;12(3):2212-20. doi: 10.1166/jnn.2012.5775.
For the successful diverse applications of different nanomaterials in life sciences, it is necessary to understand the ultimate fate, distribution and potential environmental impacts of manufactured nanomaterials. Phytotoxicity studies using higher plants is an important criterion for understanding the toxicity of engineered nanomaterials. We studied the effects of engineered carbon nanomaterials of various dimensionalities (carbon nanotubes, C60, graphene) on the germination of rice seeds. A pronounced increase in the rate of germination was observed for rice seeds in the presence of some of these carbon nanostructures, in particular the nanotubes. Increased water content was observed in the carbon nanomaterial treated seeds during germination compared to controls. The germinated seeds were then grown in a basal growth medium supplemented with carbon nanomaterials for studying their impact on further seedling growth. Treated seedlings appeared to be healthier with well-developed root and shoot systems compared to control seedlings. Our results indicate the possible use for carbon nanomaterials as enhancers in the growth of rice seedlings.
为了使不同的纳米材料在生命科学中成功实现多样化应用，有必要了解人造纳米材料的最终归宿、分布及潜在的环境影响。利用高等植物进行的植物毒性研究是了解工程纳米材料毒性的重要标准。我们研究了各种维度的工程碳纳米材料（碳纳米管、C60、石墨烯）对水稻种子萌发的影响。在某些碳纳米结构存在的情况下，尤其是碳纳米管，观察到水稻种子的发芽率显著提高。与对照相比，在萌发过程中，经碳纳米材料处理的种子含水量增加。然后，将发芽的种子种植在添加了碳纳米材料的基础生长培养基中，以研究其对幼苗进一步生长的影响。与对照幼苗相比，经处理的幼苗根系和地上部系统发育良好，看起来更健康。我们的结果表明碳纳米材料有可能用作水稻幼苗生长的促进剂。
