| 马兵兵,姜昭,叶思源,刘晓雪,马昱亨,张颖.狼尾草典型生理生化特征对阿特拉津胁迫的响应[J].农业环境科学学报,2015,34(11):2083-2088. |
| 狼尾草典型生理生化特征对阿特拉津胁迫的响应 |
| Typical Physiological and Biochemical Characteristics of Pennisetum americanum L.(cv. K. Schum) Under Atrazine Stresses |
| 投稿时间：2015-05-04 |
| DOI：10.11654/jaes.2015.11.007 |
| 中文关键词: 狼尾草 阿特拉津 胁迫 生物量 丙二醛 脯氨酸 响应 |
| 英文关键词: Pennisetum americanum L.(cv. K. Schum) atrazine stress biomass MDA proline response |
| 基金项目:国家自然科学基金(31300433);黑龙江省高校创新团队建设计划项目(2013TD003);东北农业大学SIPT大学生创新计划项目(201410224099);哈尔滨市科技创新人才研究专项基金(2012RFXXN013) |
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| 中文摘要: |
| 通过盆栽试验考察狼尾草生长(生物量及根冠比)及典型生理指标(叶绿素、丙二醛及脯氨酸含量)对不同浓度阿特拉津污染胁迫的响应规律.结果显示,高浓度阿特拉津胁迫下狼尾草生物量(≥ 100 mg·kg-1)、根冠比(≥ 200 mg·kg-1)两类生长指标与对照处理相比达到显著性抑制水平.阿特拉津胁迫(≤ 200 mg·kg-1)对狼尾草叶片中叶绿素含量的影响较小,各污染处理样品叶绿素含量与对照组的差异不显著;阿特拉津污染胁迫水平达到100 mg·kg-1时,狼尾草叶片中脯氨酸含量达到最大值(39.38 μg·kg-1),同时丙二醛含量与对照处理相比呈现显著升高的趋势.上述结果表明:只有在较高浓度阿特拉津(≥ 100 mg·kg-1)胁迫水平条件下,狼尾草典型生长及生理指标才逐渐受到极显著影响,从植物生长与生理角度揭示了狼尾草对阿特拉津具有较强的耐受能力. |
| 英文摘要: |
| 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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