Investigate growth of Paris polyphylla under synergic effects of CeO2 and SiO2 using as fertilizers

Abstract

This study successfully synthesized SiO₂ and CeO₂ nano-materials to fertilize for Paris polyphylla (P. polyphylla). The obtained results indicated that nano CeO₂ and SiO₂ enhanced root growth and plan height of the P. polyphylla, respectively. This was due to the P. polyphylla absorbed SiO₂ nano particles via roots and transferred them to the epidermis walls and vascular bundle of stem and leaves to protect as well as to induce growth of aboveground parts while the P. polyphylla also absorbed CeO₂ nanoparticles and retained them in the epidermal roots to provide a medium culture accelerating the nutrient uptake of roots to significantly improve its growth. The simultaneously use of nano CeO₂ and SiO₂ greatly induced both root growth and plan height of the P. polyphylla. The extraction experiments suggested that significant amounts of gracillin, an important medicinal compound, accumulated in the P. polyphylla rhizome. Gracillin content in the rhizome of the CeO₂ fertilized P. polyphylla was also greatly higher than that in the SiO₂ fertilized P. polyphylla. Thus, the nano CeO₂ not only promoted the development but also enhanced formation of gracillin in the rhizome of the P. polyphylla.