This study aims at understanding the bioaccumulation and transport mechanisms of both micronutrients and macronutrients in the leaves and roots of African rice Oryza glaberrima Steud (OG) plants cultivated in Senegal during the wet season at the vegetative stage of growth and to evaluate the suitability of OG rice plants for phytoremediation. A comparative analysis of the elemental composition of roots and leaves of OG plants, provided information on the bioaccumulation of nutrients necessary for plant growth which can become detrimental if their toxicity level is reached. The elemental analysis of basic nutrients (C, H, O), macronutrients (N, P, K, Ca, Mg and S) and micronutrients (Cl, Fe, Cu, Mn, Ni and Zn) in the OG roots and leaves was made possible by several elemental analytical techniques (PIGE, RBS, PIXE and GC-TDS). All methods were validated by analysis of pure substances and certified reference materials. The high accumulation rate of Cu (5 x), Al (4 x), Zr (≥ 2 x) and Fe (~ 2 x) in the OG rice roots relative to the leaves indicates the existence of low translocation factors for these metals from root to leaves probably due to the existence of plant mechanisms to limit their transport and to preferentially accumulate Si (5.2 ± 0.5 % mass) in the rice leaves. The high accumulation rates of Cr, Mn, Ni and Rb in the OG leaves relative to the roots, and of Al, Fe, Cu and Zr in the OG roots relative to the leaves, shows that these metals can be partially removed from soil through phytoextraction processes by harvesting the shoot and root tissues.

这项研究旨在了解非洲水稻Oryza glaberrima的叶和根中微量营养素和大量营养素的生物富集和转运机制。塞内加尔生长在营养生长阶段的湿季期间种植的Steg（OG）植物，并评估OG水稻植物对植物修复的适合性。对OG植物根和叶的元素组成进行的比较分析，提供了植物生长所必需的营养素的生物积累信息，如果达到其毒性水平，则可能有害。OG根和叶中基本营养素（C，H，O），大量营养素（N，P，K，Ca，Mg和S）和微量营养素（Cl，Fe，Cu，Mn，Ni和Zn）的元素分析是通过多种元素分析技术（PIGE，RBS，PIXE和GC-TDS）得以实现。所有方法均通过分析纯净物质和经认证的参考物质进行验证。Cu（5 x），Al（4 x），OG水稻根部相对于叶的Zr（≥2 x）和Fe（〜2 x）表明这些金属从根到叶存在低位易位因子，可能是由于存在限制其转运和转移的机制。优先在稻叶中积累Si（5.2±0.5％质量）。OG叶片中相对于根部的Cr，Mn，Ni和Rb的高累积速率，以及OG相对于叶片中的Al，Fe，Cu和Zr相对于叶片的高累积速率，表明这些金属可以通过以下方式从土壤中部分去除通过收获芽和根组织进行植物提取过程。