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| Effects of sulfur on the characteristics of sulfur-containing compounds and Pb accumulation in Arabis alpina L. var. parviflora Franch |
| Received:February 25, 2021 |
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| KeyWord:sulfur;Pb;bioconcentration factor;sulfur-containing compounds;enzyme activity |
| Author Name | Affiliation | E-mail | | MOU Fengli | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | YANG Jingmin | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | LIU Cui | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | LIU Caixin | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | LIU Mei | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | CHEN Jianjun | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | ZU Yanqun | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | WANG Jixiu | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | 951143330@qq.com |
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| Abstract: |
| To explore the mechanism by which sulfur-containing compounds promote the accumulation of Pb in Arabis alpina L. var. parviflora Franch, a pot experiment was carried out with different sulfur concentrations added by exogenous sources to determine the content of cysteine, glutathione, and glutamine, and enzyme activity. The results showed that under the 50 mg·kg-1 S treatment, the shoot and root biomass of A. alpina significantly increased by 85.0% and 46.2%, respectively. Under the 150 and 200 mg·kg-1 S treatments, the available Pb content in the soil significantly increased by 3.6% and 4.1%, respectively, and the Pb content in the roots of A. alpina significantly increased by 23.1% and 32.8%, respectively. 50 and 100 mg·kg-1 S treatments promoted the accumulation of Pb in A. alpina, and the bioconcentration factor significantly increased by 64.2% and 107.8%, respectively. Sulfur treatment significantly increased the content of sulfur-containing compounds and enzyme activity in A. alpina. The content of Pb in the roots of A. alpina was extremely significantly positively correlated with the content of glutamate(Glu) in the shoot, and was positively correlated with the shoot γ-glutamylcysteine synthase(γ-GCS) and glutathione reductase(GR) activities. The content of Pb in the root of A. alpina was extremely significantly positively correlated with the content of cysteine(Cys) in the root, and significantly positively correlated with the activities of shoot γ-GCS, GR, and glutathione S-transferase(GST). Studies have found that an appropriate amount of applied sulfur promote the synthesis of sulfur-containing compounds in A. alpina, improve the activity of key enzymes, and improve the ability to enrich Pb, which is beneficial for the restoration of Pb-contaminated soil. |
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