| 金彩霞,郭 桦,刘军军.磺胺间甲氧嘧啶胁迫对小麦幼苗生理生化指标的影响[J].农业环境科学学报,2014,33(4):634-639. |
| 磺胺间甲氧嘧啶胁迫对小麦幼苗生理生化指标的影响 |
| Physiological and Biochemical Changes in Wheat Seedlings Under Sulfamonomethoxine Stress |
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| DOI：10.11654/jaes.2014.04.003 |
| 中文关键词: 磺胺间甲氧嘧啶 小麦 幼苗 生化指标 |
| 英文关键词: sulfamonomethoxine wheat seedling physiological and biochemical parameter |
| 基金项目: |
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| 摘要点击次数: 2143 |
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| 中文摘要: |
| 采用室内盆栽法，研究了不同浓度磺胺间甲氧嘧啶（SMM）胁迫对小麦幼苗生化指标的影响，初步阐明了SMM对小麦幼苗的毒害机理。研究表明，在实验前3 d，不同浓度胁迫下，各处理叶绿素（Chl）含量之间差异不显著，在实验第5~7 d，高浓度（10 mg·kg-1和20 mg·kg-1）处理Chl含量显著低于对照。实验期间，随SMM浓度增加可溶性蛋白（SP）含量明显下降，SP可作为SMM污染胁迫的生物标记物。SMM胁迫促使丙二醛（MDA）含量相对对照有所增加，且对根系影响强于叶片。SMM胁迫对过氧化物酶（POD）活性整体上表现为激活作用，呈先下降后上升趋势，且根系POD活性远高于叶片。超氧化物歧化酶（SOD）活性在胁迫下表现出类似规律，但随胁迫时间延长，各处理与对照间的差异逐渐减小。 |
| 英文摘要: |
| Sulfamonomethoxine, widely used in livestock production, may eventually affect plants after entering the soil environment via animal feces. A pot experiment was carried out to investigate the physiological and biochemical responses of wheat seedlings to different concentrations of sulfamonomethoxine（SMM）. Compared to the control, SMM treatments had no significant influences on chlorophyll（Chl）contents during the first 3 days of the stress, but the treatments with 10 mg·kg-1 and 20 mg·kg-1 reduced the Chl contents in the 5th to 7th day. Addition of SMM markedly decreased the contents of soluble protein（SP）, but increased methyl di aldehyde（MDA） contents as compared to the control, with stronger influence on root system than blades. Peroxidase（POD） activity was decreased by SMM at lower than 10 mg·kg-1, while increased at higher concentrations. Superoxide dismutase（SOD） activity showed similar patterns to POD under SMM stresses, but the differences from the control became less as the stress time lengthened. |
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