Wu Zhilin, Yin Xuebin, Bañuelos Gary S, Lin Zhi-Qing, Liu Ying, Li Miao, Yuan Linxi
Key Laboratory of Agri-Food Safety of Anhui Province, Scientific Observing and Experimental Station of Agricultural Environment of the Ministry of Agriculture - Laboratory of Quality and Safty Risk Assessment for Agricultural Products on Storage and Preservation of the Ministry of Agriculture, School of Plant Protection - School of Resources and Environment, Anhui Agricultural UniversityHefei, China; School of Earth and Space Sciences, University of Science and Technology of ChinaHefei, China; Jiangsu Bio-Engineering Research Centre of Selenium, Suzhou Institute for Advanced Study, University of Science and Technology of ChinaSuzhou, China.
School of Earth and Space Sciences, University of Science and Technology of ChinaHefei, China; Jiangsu Bio-Engineering Research Centre of Selenium, Suzhou Institute for Advanced Study, University of Science and Technology of ChinaSuzhou, China; Institute of Advanced Technology, University of Science and Technology of ChinaHefei, China.
Front Plant Sci. 2016 Dec 15;7:1875. doi: 10.3389/fpls.2016.01875. eCollection 2016.
The present study investigated the beneficial role of selenium (Se) in protecting oilseed rape ( L.) plants from cadmium (Cd) and lead (Pb) toxicity. Exogenous Se markedly reduced Cd and Pb concentration in both roots and shoots. Supplementation of the medium with Se (5, 10, and 15 mg kg) alleviated the negative effect of Cd and Pb on growth and led to a decrease in oxidative damages caused by Cd and Pb. Furthermore, Se-enhanced superoxide free radicals ([Formula: see text]), hydrogen peroxide (HO), and lipid peroxidation, as indicated by malondialdehyde accumulation, but decreased superoxide dismutase and glutathione peroxidase activities. Meanwhile, the presence of Cd and Pb in the medium affected Se speciation in shoots. The results suggest that Se could alleviate Cd and Pb toxicity by preventing oxidative stress in oilseed rape plant.
本研究调查了硒（Se）在保护油菜（L.）植株免受镉（Cd）和铅（Pb）毒性影响方面的有益作用。外源硒显著降低了根和地上部中镉和铅的浓度。向培养基中添加硒（5、10和15毫克/千克）减轻了镉和铅对生长的负面影响，并导致镉和铅引起的氧化损伤减少。此外，硒增强了超氧自由基（[公式：见正文]）、过氧化氢（HO）以及脂质过氧化作用，丙二醛积累表明了这一点，但降低了超氧化物歧化酶和谷胱甘肽过氧化物酶的活性。同时，培养基中镉和铅的存在影响了地上部中硒的形态。结果表明，硒可以通过防止油菜植株的氧化应激来减轻镉和铅的毒性。
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