[外源 NO 与 EDDS 结合使用对土壤镉胁迫条件下 Bidens pilosa 的生长和镉积累的影响]。

Q2 Environmental Science
Yu-Zhi Lu, Yin-Ping Chen, Hai-Fan Xie, Bo Cao, Qian Li, Yong Sun, Qiao-Ling Yuan
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引用次数: 0

摘要

在40 mg·kg-1 Cd胁迫下,采用盆栽试验研究0.05、0.10、0.20和0.30 mmol·L-1硝普钠(SNP)和0.50、1.00和1.50 mmol·L-1 [S,S]-乙二胺二琥珀酸(EDDS)对毛拜登幼苗生长、代谢和Cd积累的影响。结果表明,与对照组(不加SNP和EDDS)相比,不同浓度SNP或EDDS单处理均能显著提高三叶草地上部和地下部的株高、根长、鲜重和干重,有效提高地上部和地下部的光合色素含量和Cd含量。不同浓度SNP和EDDS联合处理能有效促进毛囊白檀的生长,部分生长指标和Cd积累指标均高于相同浓度SNP和EDDS单独处理。其中,0.20 mmol·L-1 SNP + 1.00 mmol·L-1 EDDS复合处理的效果如下:①处理显著提高了金针叶生物量,地上部和地下部株高和鲜干质量分别提高了39.47%、142.32%和267.63%,地上部和地下部鲜干质量分别提高了377.63%和304.55%。②显著提高了金针叶对Cd污染土壤的修复效果,金针叶地上部分和地下部分的Cd含量、富集系数、修复效率和输送系数分别提高了91.22%、81.51%、101.71%、91.37%、641.67%和5.14%,地上部分的Cd含量和富集系数显著高于地下部分。③处理还显著提高了毛囊菌亚细胞部分Cd含量,细胞壁和可溶性部分Cd含量高于细胞器和线粒体部分Cd含量,地上部分亚细胞部分Cd含量也高于地下部分Cd含量。综合分析表明,在土壤Cd胁迫下,适当浓度的SNP和EDDS能有效促进毛毛白花的生长和Cd积累,有助于毛毛白花通过细胞壁屏障和液泡区隔增强抗Cd能力和解毒能力。实验结果表明,0.20 mmol·L-1 SNP + 1.00 mmol·L-1 EDDS的组合可提高金丝桃对cd污染土壤的修复效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
[Effects of Exogenous NO Combined with EDDS on Growth and Cd Accumulation of Bidens pilosa under Soil Cd Stress Conditions].

Under 40 mg·kg-1 Cd stress, pot experiments were conducted to investigate the effects of 0.05, 0.10, 0.20, and 0.30 mmol·L-1 sodium nitroprusside (SNP) and 0.50, 1.00, and 1.50 mmol·L-1 [S,S]-ethylenediamine disuccinic acid (EDDS) on the growth, metabolism, and Cd accumulation of Bidens pilosa seedlings. The results showed that compared with those of the control group (without SNP and EDDS), different concentrations of SNP or EDDS single treatment could significantly increase the plant height, root length, fresh weight, and dry weight of aboveground and underground parts of B. pilosa and effectively increase the photosynthetic pigment content and Cd content in the aboveground and underground parts. The combined treatment of different concentrations of SNP and EDDS could effectively promote the growth of B. pilosa, and some growth indices and Cd accumulation indices were higher than those of the single treatment of SNP and EDDS at the same concentration. Among them, the 0.20 mmol·L-1 SNP + 1.00 mmol·L-1 EDDS composite treatment had the following effects: ① The treatment significantly promoted the biomass of B. pilosa and increased the plant height and fresh and dry weight of aboveground and underground parts by 39.47%, 142.32% and 267.63%, and 377.63% and 304.55%, respectively. ② It significantly improved the remediation effect of B. pilosa on Cd-contaminated soil, and the Cd content, enrichment coefficient, remediation efficiency, and transport coefficient of aboveground and underground parts of B. pilosa were increased by 91.22% and 81.51%, 101.71%, and 91.37%, 641.67%, and 5.14%, respectively, and the Cd content and enrichment coefficient of aboveground parts were significantly higher than those of underground parts. ③ The treatment also significantly increased the Cd content in subcellular fractions of B. pilosa, the Cd content in the cell wall and soluble part was higher than that in the organelle and mitochondrial parts, and the Cd content in subcellular fractions of the aboveground part was also higher than that of the underground part. The comprehensive analysis showed that the application of appropriate concentrations of SNP and EDDS could effectively promote the growth and Cd accumulation of B. pilosa under soil Cd stress, which is helpful for B. pilosa to enhance Cd resistance and detoxification through the cell wall barrier and vacuolar compartmentation. According to the experimental results, the combination of 0.20 mmol·L-1 SNP + 1.00 mmol·L-1 EDDS can be used to enhance the remediation efficiency of B. pilosa on Cd-contaminated soil.

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来源期刊
环境科学
环境科学 Environmental Science-Environmental Science (all)
CiteScore
4.40
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15329
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