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| Typical Physiological and Biochemical Characteristics of Pennisetum americanum L.(cv. K. Schum) Under Atrazine Stresses |
| Received:May 04, 2015 |
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| KeyWord:Pennisetum americanum L.(cv. K. Schum);atrazine;stress;biomass;MDA;proline;response |
| Author Name | Affiliation | E-mail | | MA Bing-bing | School of Resource & Environment, Northeast Agricultural University, Harbin 150030, China | | | JIANG Zhao | School of Resource & Environment, Northeast Agricultural University, Harbin 150030, China | | | YE Si-yuan | School of Resource & Environment, Northeast Agricultural University, Harbin 150030, China | | | LIU Xiao-xue | School of Resource & Environment, Northeast Agricultural University, Harbin 150030, China | | | MA Yu-heng | School of Resource & Environment, Northeast Agricultural University, Harbin 150030, China | | | ZHANG Ying | School of Resource & Environment, Northeast Agricultural University, Harbin 150030, China | zhangyinghr@hotmail.com |
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| Abstract: |
| Atrazine is one of the most widely used herbicides for controlling broadleaf weeds. Hence, increased uses of the herbicide have resulted in severe soil pollution. In order to evaluate the impact of atrazine stresses on Pennisetum americanum L.(cv. K. Schum), a plant used for remediating atrazine contaminated soil, a pot experiment was conducted to investigate the responses of typical physiological and biochemical characteristics of the plant to different concentrations of atrazine. Compared to the control treatment, atrazine at 100 mg·kg-1 and 200 mg·kg-1 significantly reduced plant biomass and root/shoot ratio, respectively, showing that the sensitivity of roots to atrazine stress was greater than that of the shoots. However, atrazine showed slight inhibition of chlorophyll content of the plant. At 100 mg·kg-1 atrazine, the proline content in leaves reached the maximum(39.38 μg·g-1 FW), and MDA content also significantly increased, compared to the control. These results indicated that the growth, physiological and biochemical indicators of P. americanum L.(cv. K. Schum) could be significantly affected by atrazine at high levels(≥100 mg·kg-1). This research shed light on the application of P. americanum L.(cv. K. Schum) in remediation of agricultural soils contaminated with low concentrations of atrazine. |
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