Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad, Pakistan.
Department of Biotechnology, COMSATS University Islamabad, Abbottabad, Pakistan.
Microsc Res Tech. 2021 Nov;84(11):2517-2529. doi: 10.1002/jemt.23801. Epub 2021 Apr 27.
The present study aimed to evaluate the effects of Cd and Cr as separate and in combinations in hydroponically grown seedlings of FA-08 and SH-13 cultivars of wheat (Triticum aestivum L.). The concentrations of heavy metals were higher in the root as compared to shoot and were more pronounced in SH-13 than FA-08 cultivar. The decrease in the seedling length and biomass was observed when the metals were applied in combined form (Cd-Cr 80-120, Cd-Cr 100-120, Cr-Cd 140-80, and Cr-Cd 140-100). There were more declines in root length in the cultivar SH-13 as compared to the shoot length, as the concentration of HMs increased. The root at level Cr-140 and shoot at level Cd-100 showed more reduction in SH-13 than FA-08. The high concentration of Cd and Cr affected the root epidermis, the cortical cells, and the xylem vessel. The size and number of stomata, length of long cells and short cells, and trichome were reduced at the concentration Cd-100 and Cr-140. The present study showed that the higher concentration of Cd and Cr affects the morpho-anatomical features of both selected wheat cultivar moderately.
本研究旨在评估 Cd 和 Cr 作为单一元素以及组合元素对 FA-08 和 SH-13 两个小麦品种（Triticum aestivum L.）水培幼苗的影响。与地上部分相比，根部重金属浓度更高，且在 SH-13 品种中比 FA-08 更为明显。当金属以组合形式（Cd-Cr 80-120、Cd-Cr 100-120、Cr-Cd 140-80 和 Cr-Cd 140-100）施加时，幼苗长度和生物量减少。随着 HMs 浓度的增加，SH-13 的根长比地上部分的长度下降得更多。与 FA-08 相比，在 Cr-140 水平下的根和在 Cd-100 水平下的地上部分，SH-13 的下降幅度更大。高浓度的 Cd 和 Cr 影响根表皮、皮层细胞和木质部导管。在 Cd-100 和 Cr-140 浓度下，气孔的大小和数量、长细胞和短细胞的长度以及毛状体减少。本研究表明，较高浓度的 Cd 和 Cr 对所选小麦品种的形态解剖特征有一定影响。
