| Effects of exogenous silicon on plant growth and activity of anti-oxidative enzymes in wheat seedlings under drought stress |
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| DOI：10.7606/j.issn.1000-7601.2017.02.13 |
| Key Words: exogenous silicon PEG stress wheat anti-oxidative enzymes |
| Author Name | Affiliation | | ZHENG Shi-ying | College of Ecology and Landscape Architecture, Dezhou University, 253023, China | | ZHENG Jian-feng | Colleege of Economics and Management, Dezhou University, 253023, China | | XU Jian | College of Physics and Electronic Infromation, Dezhou University, 253023, China | | ZHENG Fang | College of Ecology and Landscape Architecture, Dezhou University, 253023, China | | LI Shi-ping | College of Ecology and Landscape Architecture, Dezhou University, 253023, China | | ZHANG Nai-qin | College of Ecology and Landscape Architecture, Dezhou University, 253023, China | | YU Ling-chun | College of Ecology and Landscape Architecture, Dezhou University, 253023, China | | GENG Jian-fen | College of Ecology and Landscape Architecture, Dezhou University, 253023, China |
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| Abstract: |
| Using DK961 and TS9818 as experimental materials, the effects of different concentration of exogenous silicon on the growth of wheat seedlings and antioxidant enzyme activity under PEG stress were studied. Results indicated that: compared with only PEG stress, when the exogenous silicon concentration was 1.0 mmol·L-1, the fresh weight, the dry weight and the root activity of DK961 and TS9818 were the highest, increased by 32.85%, 49.43%, 24.14%, 50.00%, and 18.97%, 15.60%, respectively, and the cell membrane permeability was the lowest, reduced by 12.53% and 10.48%, respectively. When exogenous silicon concentrations was 0.5 mmol·L-1, the SOD and CAT activities of DK961 and TS9818 were the largest, increased by 18.11%,19.71%, and 47.41%, 19.71%, respectively; when exogenous silicon concentrations were 0.5 and 0.1 mmol·L-1, the POD activity of DK961 and TS9818 were the largest, increased by 18.41% and 13.02%, respectively, and the MDA content was the lowest, reduced by 11.80% and 12.31%, respectively. Lower concentration of exogenous silicon can promote the growth of wheat seedlings effectively under PEG stress, increasing the activity of antioxidant enzymes while reducing the content of MDA. Exogenous silicon can avoid the hazard of drought stress on wheat seedling. |
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