不同浓度硒处理对彩叶草铅胁迫的EDXS和XRD分析

以彩叶草(Coleus blumei Benth.)为材料,用营养液培养方法,研究了不同浓度硒(Se)处理对浓度为1.0 mmol·L-1 Pb2+胁迫下彩叶草根、叶的形貌变化及其组分形态等变化,从光谱学角度初步探讨了硒对重金属铅毒害的缓解机制。结果表明:铅胁迫下的彩叶草根系C、K、Ca含量减少,O、Mg、Al、Si、Fe、Pb含量增加,叶片中的C、Mg、Al、Si、K、Ca、Fe含量减少,O、Cl含量增加。铅胁迫下硒处理的彩叶草根元素种类及其元素含量均发生了明显变化;根中晶体情况及其晶相也发生了相应变化。

EDXS and XRD Analyses of Coleus with Different Concentration Selenium Supplements Under Lead Stress

In order to study the changes of the morphologies and element composition in Coleus blumei Benth(Coleus)roots and leaves under 1.0 mmol·L-1Pb2+stress with selenium(Se)treatments, and to preliminarily investigate the relief mechanism of Se level on lead toxicity from the perspective of spectroscopy, Coleus was cultivated in nutrient solutions with different concentrations of Se. The results showed that the content of C, K and Ca elements in roots decreased, while O, Mg, Al, Si, Fe and Pb elements increased under Pb stress with Se treatments. In addition, the content of C, Mg, Al, Si, K, Ca and Fe elements in leaves decreased, while O and Cl elements increased. The element species and its contents in roots were changed obviously under Pb stress with Se treatments, and crystalline solid and crystal phase in roots were correspond-ingly changed.