## 3 Results
### Variation in Element Contents in Roots, Stems, Leaves and Grains of Triticum aestivum_ L.
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Concentration Gradient (mg/kg)**} & \multicolumn{4}{c}{**The Jointing Stage**} & \multicolumn{4}{c}{**The Maturity Stage**} \\ \cline{2-9}  & **Roots** & **Stems** & **Leaves** & **Roots** & **Stems** & **Seeds** \\ \hline \multirow{4}{*}{CK (\(n=6\))} & Minimum & 918 & 120 & 118 & 816 & 193 & 113 \\  & Maximum & 3437 & 306 & 164 & 1398 & 735 & 180 \\  & Mean & 1649 & 227 & 142 & 1098 & 467 & 155 \\  & Standard Deviation & 945 & 72 & 17 & 261 & 176 & 23 \\  & Sig. & a & ab & b & c & ab & a \\ \hline \multirow{4}{*}{4.5 (\(n=6\))} & Minimum & 763 & 112 & 139 & 863 & 187 & 114 \\  & Maximum & 1932 & 212 & 240 & 1778 & 724 & 155 \\  & Mean & 1152 & 172 & 177 & 1364 & 417 & 133 \\  & Standard Deviation & 426 & 38 & 35 & 383 & 176 & 16 \\  & Sig. & ab & ab & b & c & ab & a \\ \hline \multirow{4}{*}{7.2 (\(n=6\))} & Minimum & 676 & 135 & 113 & 926 & 501 & 112 \\  & Maximum & 1623 & 872 & 222 & 2926 & 830 & 188 \\  & Mean & 1145 & 288 & 162 & 2206 & 612 & 151 \\  & Standard Deviation & 388 & 288 & 40 & 767 & 166 & 28 \\  & Sig. & ab & a & b & a & a & a \\ \hline \multirow{4}{*}{10 (\(n=6\))} & Minimum & 592 & 88 & 112 & 871 & 225 & 97 \\  & Maximum & 1177 & 189 & 201 & 3848 & 1017 & 216 \\  & Mean & 975 & 143 & 156 & 2142 & 553 & 149 \\  & Standard Deviation & 206 & 45 & 35 & 1067 & 342 & 45 \\  & Sig. & b & ab & b & ab & ab & a \\ \hline \multirow{4}{*}{15 (\(n=6\))} & Minimum & 802 & 97 & 114 & 801 & 267 & 105 \\  & Maximum & 1780 & 196 & 190 & 1764 & 620 & 181 \\  & Mean & 1167 & 127 & 143 & 1444 & 353 & 134 \\  & Standard Deviation & 330 & 36 & 30 & 370 & 134 & 28 \\  & Sig. & ab & b & b & bc & b & a \\ \hline \multirow{4}{*}{40 (\(n=6\))} & Minimum & 751 & 86 & 192 & 1257 & 281 & 93 \\  & Maximum & 2429 & 180 & 401 & 2209 & 848 & 150 \\ \cline{1-1}  & Mean & 1481 & 116 & 271 & 1709 & 505 & 127 \\ \cline{1-1}  & Standard Deviation & 609 & 33 & 83 & 320 & 217 & 24 \\ \cline{1-1}  & Sig. & ab & b & a & abc & ab & a \\ \hline \hline \end{tabular} Note: Statistical significance of means was tested using [PERSON]’s Honest Significant Difference (HSD) test. In the table, “Sig.” denotes the significance of the [PERSON] statistical test (\(p<0.05\)). The letter assignment for statistical significance was as follows: the means in each column were arranged from largest to smallest. The highest mean was designated as “a”, and this mean was compared with each subsequent mean. Means not significantly different were also marked as “a”. Significantly different means were marked as \(\text{b}^{\prime}\). The mean marked “b” was then used as the standard for comparison with larger means, marking means not significantly different as ’b’ until a significant difference was found. This process continued with subsequent letters (’c’, etc.) until all means in the column were assigned.  
\end{table} 
Table 8: Distribution characteristics of iron content in organs of _Triticum aestivum_ L. during jointing and maturity stages. Enrichment Coefficients of Iron in Different Parts of Enrichment Coefficients of Iron in Different Parts of Triticum aestivum L  
The enrichment coefficients of iron in different parts of the _Tritcium aestivum_ L. plants in this experiment are presented in Tables 9 and 10. It can be seen from the table that the enrichment coefficients of different parts of _Tritcium aestivum_ L. are all less than 1, showing an enrichment pattern of roots > stems/leaves > seeds. The enrichment coefficient of iron in _Tritcium aestivum_ L. roots is considerably higher than that in overground parts, with the average enrichment coefficient of roots being 0.033 at the jointing stage and 0.045 at the maturity stage, respectively. The enrichment coefficients of stems, leaves, and seeds at the jointing stage are similar, averaging 0.005. At maturity, the enrichment coefficient of the stem and leaf increased by one order of magnitude, reaching an average value of 0.013.