冬氨酸二丁二酸醚和酒石酸配施对籽粒苋生长和镉富集特征的影响

doi:10.16036/j.issn.1000-2650.2021.06.017

摘要/Abstract

摘要： 【目的】为探讨生物可降解螯合剂冬氨酸二丁二酸醚（AES）和酒石酸（TA）对籽粒苋（Amaranthus hybridus L.）修复镉（Cd）污染土壤的效果。【方法】采用盆栽试验,研究施用AES和TA对籽粒苋生长、抗氧化酶活性和Cd富集特征的影响。【结果】单独添加AES对籽粒苋生物量无显著影响,而单独添加TA,以及AES和TA配施处理均能显著提高植物生物量。随着TA的添加,叶片SOD活性显著上升,而AES处理对植物叶片抗氧化酶活性无显著影响。单独或联合施用AES与TA均提高了土壤弱酸提取态Cd所占比例,其中0.067 mmol/kg TA与5 mmol/kg AES配施时弱酸提取态Cd所占比例最高,为对照的1.53倍。AES和TA添加不同程度提高了籽粒苋各器官中的Cd含量和积累量,在0.067 mmol/kg TA处理中,植物地上部Cd积累量比对照增加了147.37%。AES和TA配施对植物地上部富集系数有明显的提高,且土壤净化率比为对照的1.24~2.08倍。【结论】AES和TA配施能显著改善籽粒苋对Cd的提取效率。

关键词: 冬氨酸二丁二酸醚, 酒石酸, 籽粒苋, 镉, 植物修复

Abstract: 【Objective】 The aim of the present study was to focus on the possibility of improving the phytoextraction of Cd by Amaranthus hybridus L. with the application of aspartic acid diethoxvsuccinate (AES) and tartaric acid (TA). 【Method】 Pot experiments were conducted to investigate the effects of AES and TA on the growth, antioxidant enzyme activity and Cd accumulation in A. hybridus. 【Result】 The application of AES had no significant effect on the biomass of A. hybridus, while TA alone addition, AES and TA combined application could significantly improve the biomass of plant. SOD activity in leaves increased significantly with the addition of TA. No such effect was observed for AES. Application of AES and TA alone or in combination enhanced the proportion of weak acid extractable Cd in soils, and the maximum proportion of weak acid extractable Cd when 0.067 mmol/kg TA and 5 mmol/kg AES were combined was 1.53 times than that of the control. The addition of AES and TA improved the concentration and accumulation of Cd in different organs of A. hybridus, and the highest shoot Cd accumulation increased by 147.37% under 0.067 mmol/kg TA treatment compared with the control. AES and TA combined application significantly increased the shoot bioconcentration factor, and the Cd purification rate were 1.24~2.08 times compared with the control. 【Conclusion】 Thus, the data demonstrate that the application of AES and TA improve the phytoextraction in A. hybridus.

Key words: AES, tartaric acid, Amaranthus hybridus L., cadmium, phytoremediation

中图分类号:

何明倩, 卢欣, 唐妍, 陈芝吟, 夏涓文, 徐小逊, 李启蓝. 冬氨酸二丁二酸醚和酒石酸配施对籽粒苋生长和镉富集特征的影响[J]. 四川农业大学学报, 2021, 39(6): 827-834.

HE Mingqian, LU Xin, TANG Yan, CHEN Zhiyin, XIA Juanwen, XU Xiaoxun, LI Qilan. Effects of Combined Application of Aspartic Acid Diethoxvsuccinate and Tartaric Acid on Growth and Cadmium Enrichment Characteristics of Amaranthus hybridus L.[J]. Journal of Sichuan Agricultural University, 2021, 39(6): 827-834.

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