| 四季海棠不同叶片对土壤铅胁迫的生理响应 |
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| 引用本文： | 何彦青,李强,井伟业,李俊良,李胜.四季海棠不同叶片对土壤铅胁迫的生理响应[J].内蒙古农业科技,2014(3):35-37. |
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| 作者姓名： | 何彦青 李强 井伟业 李俊良 李胜 |
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| 作者单位： | 东北林业大学园林学院,黑龙江哈尔滨150040 |
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| 基金项目： | 东北林业大学大学生创新训练项目（201210225015） |
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| 摘 要： | 为研究城市土壤中铅（Pb）胁迫对城市园林花卉植物的影响,采用盆栽试验的方法,研究了土壤Pb胁迫对四季海棠（Begoniasemperflorens）不同叶片生理特性的影响.结果表明：在土壤Pb胁迫下,四季海棠不同叶片的超氧化物歧化酶（SOD）、过氧化物酶（POD）活性随着土壤Pb浓度的增加表现出先增加后降低的趋势,而过氧化氢酶（CAT）活性始终保持上升趋势;质膜透性增大,丙二醛（MDA）含量上升;不同叶片对土壤Pb胁迫的响应存在差异,以新叶最敏感,成熟叶次之,老叶最不敏感.
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| 关 键 词： | 四季海棠 铅胁迫 生理响应 |
Physiological Responses of Different Leaves of Begonia semperflorens to Plumbum Stress in Soil |
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| Institution: | He Yan-qing (North East Forest University, Garden College, Harbin 150040,China) |
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| Abstract: | To understand the physiological responses of different leaves of Begonia sempeflorens to Pb stress, the effects of different soil Pb concentrations on the activities of physiological characteristics in different leaves were studied in a pot experiment with different Pb treatments. The results showed that under Pb stress, the SOD and CAT and POD activity increased firstly and then decreased; POD activity and cell membrane relative permeability and malondialdehyde （MDA） increased gradually along with soil drought stress proceeding. The response of fresh leaves to soil Pb stress was more sensitive than that of old leaves and mature leaves. |
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| Keywords: | Begonia semperflorens Plumbum stress Physiological response |
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