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Effects of selenium and silicon on enhancing antioxidative capacity in ramie (Boehmeria nivea (L.) Gaud.) under cadmium stress

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WOS被引频次:27
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成果类型:
期刊论文
作者:
Tang, Hui;Liu, Yunguo*;Gong, Xiaomin;Zeng, Guangming;Zheng, Bohong;Wang, Dafei;Sun, Zhichao;Zhou, Lu;Zeng, Xiaoxia
通讯作者:
Liu, Yunguo
作者机构:
[Tang, Hui; Wang, Dafei; Zhou, Lu; Liu, Yunguo; Zeng, Guangming; Zeng, Xiaoxia; Sun, Zhichao; Gong, Xiaomin] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
[Tang, Hui; Wang, Dafei; Zhou, Lu; Liu, Yunguo; Zeng, Guangming; Zeng, Xiaoxia; Sun, Zhichao; Gong, Xiaomin] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.
[Zheng, Bohong] Cent S Univ, Sch Architecture & Art, Changsha 410083, Hunan, Peoples R China.
通讯机构:
[Liu, Yunguo] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.
语种:
英文
关键词:
Antioxidative system;GSH;Ramie;Selenium;Silicon;Vitamin E
期刊:
Environmental Science and Pollution Research
ISSN:
0944-1344
年:
2015
卷:
22
期:
13
页码:
9999-10008
文献类别:
WOS:Article
所属学科:
ESI学科类别:环境科学/生态学;WOS学科类别:Environmental Sciences
入藏号:
基金类别:
National Natural Science Foundation of China [41271332, 51478470]; Natural Science Foundation of Hunan province [11JJ2031]
机构署名:
本校为其他机构
院系归属:
建筑与艺术学院
摘要:
Hydroponic experiments were performed to investigate the ameliorating effects and mitigation mechanisms of selenium and silicon on Cd toxicity in Boehmeria nivea (L.) Gaud. Metal accumulation, chlorophyll content, activities of antioxidant enzymes, and antioxidant contents in ramie were evaluated. The results revealed that cadmium was mainly accumulated in the roots of plants rather than in the aerial parts. Additionally, under 5 mg L−1 Cd stress, both Se (1 μmol L−1) and Si (1 mmol L−1) treatments decreased the Cd concentrations in plants. Besides, the treatments also inhibited the translocation ability of Cd from roots to the aboveground parts, which might be related to the decline of generation of reactive oxygen species (ROS). The application of Se and/or Si ameliorated Cd toxicity via stimulating the activities of antioxidant enzymes such as superoxide dismutase (SOD), guaiacol peroxidase (POD), and ascorbate peroxidase (APX), which resulted in the significant decrease of the contents of malondialdialdehyde (MDA) and hydrogen peroxide (H2O2) in ramie leaves. In addition, the content of nonenzymatic antioxidant such as glutathione (GSH) was increased significantly through the addition of selenite and silicate. Also, ascorbate (AsA) and vitamin E played a crucial role in scavenging excess ROS within plants. On the whole, appropriate doses of Se and Si were found to benefit plant growth and enhance the ability of ramie to alleviate Cd-induced stress. Moerover, the effects of combination of Se and Si appeared to be more superior compared to addition separately in response to Cd stress. © 2015, Springer-Verlag Berlin Heidelberg.
参考文献:
Ali S et al (2013) The influence of silicon on barley growth, photosynthesis and ultra-structure under chromium stress. Ecotoxicol Environ Saf 89:66–72
Anderson ME (1984) Determination of glutathione and glutathione disulfide in biological samples. Method Enzymol 113:548–555
Aravind P, Prasad MNV (2005) Modulation of cadmium-induced oxidative stress in by zinc involves ascorbate–glutathione cycle and glutathione metabolism. Plant Physiol Biochem 43:107–116
Caretto S, Paradiso A, D'Amico L, De Gara L (2002) Ascorbate and glutathione metabolism in two sunflower cell lines of differing α-tocopherol biosynthetic capability. Plant Physiol Biochem 40:509–513
Cartes P, Gianfreda L, Mora M (2005) Uptake of selenium and its antioxidant activity in ryegrass when applied as selenate and selenite forms. Plant Soil 276:359–367

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