作　　者： ; ; ; ; ;

机构地区： 韶关学院

出　　处： 《生态环境学报》 2015年第9期1570-1575,共6页

摘　　要： 采用营养液培养方式,以茴香(Foeniculum vulgare Mill.)为试验材料,研究了2 mg·L-1镉质量浓度下,钼硼锌协同处理对茴香植株生长、生理指标、地上部和根系镉含量及精油组分的影响。结果表明:镉胁迫下,与对照相比,钼硼锌协同处理均未显著促进茴香植株株高生长;T5处理有利于茴香植株生物量累积和叶绿素a、叶绿素b、叶绿素a+b、类胡萝卜素的合成,T1处理的可溶性糖含量最高,可溶性蛋白质含量最低,脯氨酸含量较低,丙二醛(MDA)含量最高,且叶绿素a、叶绿素b、叶绿素a+b、类胡萝卜素的合成显著受到抑制。镉胁迫下,钼硼锌协同处理后,茴香植株地上部和根系镉含量均高于对照。茴香精油中反式-茴香脑含量以T6处理最高。总之,镉胁迫下,钼硼锌协同处理并不能缓解镉对茴香植株的毒害作用;在轻微镉污染的土壤上种植茴香以食用地上部为目的,则不宜进行钼硼锌配施,否则会增加食入镉的危险性;利用茴香进行镉污染土壤修复为目的,则建议进行钼硼锌配施,可增加茴香植株对镉的吸收累积,提高修复效率。从提高修复效率和茴香精油质量方面综合考虑,T6处理效果最好。研究结果可为镉污染农田土壤上植物种植过程中钼硼锌的合理配施提供理论参考。 The purpose of this study was to investigate the effects of molybdenum (Mo), boron (B) and zinc (Zn) coordination treatment on plant growth, physiological indexes, cadmium (Cd) content in shoot and root and essential oil components in fennel plant (Foeniculum vulgare Mill.) following treatment with Cd at the concentration of 2 mg·L-1 using solution culture. The results showed that, compared to the control, Mo, B and Zn coordination treatment did not promote plant height of fennel significantly under Cd stress. Furthermore, T5 treatment was advantageous to the accumulation of plant biomass and the synthesis of chlorophyll a, chlorophyll b, chlorophyll a+b and carotenoid. However, T1 treatment inhibited the synthesis of chlorophyll a, chlorophyll b, chlorophyll a+b and carotenoid significantly. The contents of soluble sugar and Malonaldehyde (MDA) were the highest, while the contents of soluble protein and proline were the lowest in T1 treatment. Additionally, under Cd stress, Cd content in shoot and root of plants was higher in Mo, B and Zn coordination treatment group in comparison with the control. The content of trans-anethole in essential oil of fennel plant was the highest in T6 treatment group. Taken together, Mo, B and Zn coordination treatment under Cd stress could not alleviate the toxic effect of Cd on fennel plant. The risk of Cd intake was increased with Mo, B and Zn coordination treatment when fennel was planted in soil with light Cd pollution for the edible purpose. If the purpose was to remediate Cd contaminated soil, Mo, B and Zn coordination treatment was recommended to be used for increasing the absorption and accumulation of Cd in the plant, and improving the repair efficiency of soil. The effects of T6 treatment were the best in aspect of improving recovery efficiency and the quality of essential oil. This study would provide theoretical references for the reasonable coordination treatment of Mo, B and Zn in cadmium contaminated soil to cultivate plant.

关 键 词： 茴香 钼 硼 锌 生理指标 镉含量 精油

领　　域： [环境科学与工程] [农业科学] [农业科学]