BACKGROUND AND AIMS Mineral elements have many essential and beneficial functions in plants. Phosphorus (P) deficiency can result in changes in the ionomes of plant organs. The aims of this study were to characterize the effects of P supply on the ionomes of shoots and roots, and to identify chromosomal quantitative trait loci (QTLs) for shoot and root ionomic traits, as well as those affecting the partitioning of mineral elements between shoot and root in Brassica napus grown with contrasting P supplies. METHODS Shoot and root concentrations of eleven mineral elements (B, Ca, Cu, Fe, K, Mg, Mn, Na, P, S and Zn) were investigated by ICP-OES in a Brassica napus double haploid population grown at an optimal (OP) and a low phosphorus supply (LP) in an agar system. Shoot, root and plant contents, and the partitioning of mineral elements between shoot and root were calculated. KEY RESULTS The tissue concentrations of B, Ca, Cu, K, Mg, Mn, Na, P and Zn were reduced by P starvation, while the concentration of Fe was increased by P starvation in the BnaTNDH population. A total of 133 and 123 QTLs for shoot and root ionomic traits were identified at OP and LP, respectively. A major QTL cluster on chromosome C07 had a significant effect on shoot Mg and S concentrations at LP and was narrowed down to a 2.1-Mb region using an advanced backcross population. CONCLUSIONS The tissue concentration and partitioning of each mineral element was affected differently by phosphorus starvation. There was a significant difference in mineral element composition between shoots and roots.

中文翻译：

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使用对比磷酸盐供应生长的甘蓝型油菜的芽和根离子组的遗传解剖

背景和目的矿物元素在植物中具有许多重要和有益的功能。磷 (P) 缺乏会导致植物器官离子组的变化。本研究的目的是表征磷供应对芽和根离子组的影响，并确定芽和根离子组性状的染色体数量性状位点（QTL），以及影响芽之间矿质元素分配的基因座。以及用对比性磷供应种植的甘蓝型油菜的根。方法通过 ICP-OES 研究了在最佳条件下生长的甘蓝型油菜双单倍体群体中 11 种矿物元素（B、Ca、Cu、Fe、K、Mg、Mn、Na、P、S 和 Zn）的芽和根浓度。琼脂系统中的OP）和低磷供应（LP）。计算芽、根和植物含量，以及芽和根之间矿质元素的分配。主要结果 BnaTNDH 群体中 B、Ca、Cu、K、Mg、Mn、Na、P 和 Zn 的组织浓度因 P 饥饿而降低，而 Fe 浓度因 P 饥饿而增加。在 OP 和 LP 上分别鉴定了 133 个和 123 个茎和根离子组性状 QTL。染色体 C07 上的一个主要 QTL 簇对 LP 处的芽 Mg 和 S 浓度有显着影响，并使用先进的回交群体将范围缩小到 2.1 Mb 区域。结论磷饥饿对每种矿物质元素的组织浓度和分配有不同的影响。地上部和根部矿质元素组成存在显着差异。