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以彩叶草(Coleus blumei Benth.)为材料,在含1.0mmol·L-1Pb2+的营养液中直接添加不同浓度(0.1、0.5、1.0、2.5、5.0mg·L-1)亚硒酸钠,利用X–射线衍射技术(XRD)和扫描电镜技术(SEM)从光谱学角度初步探讨铅胁迫下不同浓度硒处理对彩叶草根系和叶片粉末的形态结构的影响。结果表明,不同浓度硒对彩叶草根系和叶片粉末样品表面颗粒物微观形貌有较大影响,其中1.0mg·L-1硒处理的SEM图中颗粒分布较其它浓度处理的均匀,结构紧密,成扁平褶状;XRD衍射角向右移,强度、峰高、峰面积和半高宽减小。这说明1.0mg·L-1的硒能降低溶液中铅的迁移和转化;颗粒的分布,衍射角的移动,强度、峰高、峰面积和半高宽等变化说明彩叶草体内铅结合形态有所变化。
Different concentrations of sodium selenite (0.1, 0.5, 1.0, 2.5 and 5.0 mg · L -1) were added directly to the nutrient solution containing 1.0 mmol·L -1 Pb 2 + with Coleus blumei Benth. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to investigate the effects of different concentrations of Se under lead stress on the morphological and morphological changes of root and leaf powder from the perspective of spectroscopy. The results showed that different concentrations of selenium had a great influence on the microscopic morphology of the surface of the powdery-green leaf and the leaf powder samples. The distribution of the particles in the 1.0mg · L-1 selenium-treated SEM image was uniform and the structure was compact, Into a flat pleat; XRD diffraction angle to the right, intensity, peak height, peak area and full width at half maximum. This indicates that 1.0mg · L-1 selenium can reduce the migration and transformation of lead in solution; the distribution of particles, the shift of diffraction angle, intensity, peak height, peak area and full width at half height Some changes.