| 砷形态对黑藻和竹叶眼子菜有机酸含量的影响 |
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| 引用本文： | 钟正燕,王宏镔,王海娟,宋雁辉,李红梅.砷形态对黑藻和竹叶眼子菜有机酸含量的影响[J].生态学报,2012,32(16):5002-5013. |
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| 作者姓名： | 钟正燕 王宏镔 王海娟 宋雁辉 李红梅 |
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| 作者单位： | 昆明理工大学环境科学与工程学院,昆明,650093 |
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| 基金项目： | 国家自然科学基金资助项目(30960080) |
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| 摘 要： | 采用室内溶液培养法,运用气相色谱-质谱联用(Gas chromatography-mass spectrometry,GC-MS)技术测定在As(Ⅲ)、As(Ⅴ)和二甲基胂酸(Dimethylarsinic acid,DMA)3种形态砷(浓度0—5.0 mg/L)胁迫下,砷超富集植物黑藻(Hydrilla verticillata(Linn.f.)Royle.)和非砷超富集植物竹叶眼子菜(Potamogeton malaianus Miq.)体内生成和体外分泌的7种有机酸的含量。结果表明,黑藻体内草酸、丙二酸、柠檬酸、苹果酸和棕榈酸都显著高于竹叶眼子菜(P<0.05)。在As(Ⅲ)处理时,黑藻体内柠檬酸、苹果酸、棕榈酸、亚麻酸和总有机酸显著下降,竹叶眼子菜棕榈酸显著下降;在As(Ⅴ)处理时,黑藻棕榈酸和总有机酸显著下降,竹叶眼子菜棕榈酸显著下降;在DMA处理时,黑藻草酸、柠檬酸和苹果酸显著下降,竹叶眼子菜棕榈酸、亚麻酸和总有机酸显著下降。黑藻在As(Ⅲ)处理下棕榈酸、亚麻酸、总有机酸和As(Ⅴ)处理下草酸含量与体内As含量呈显著负相关(P<0.05),而竹叶眼子菜在As(Ⅲ)或DMA处理下棕榈酸、亚麻酸、总有机酸含量以及在DMA处理下柠檬酸含量与体内As含量均呈显著负相关(P<0.05)。两种植物根系分泌物中均检测出草酸、丙二酸、琥珀酸和棕榈酸,但只有在As(Ⅲ)或As(Ⅴ)处理时黑藻分泌的草酸与体内As含量呈显著正相关。本研究表明As(Ⅲ)或As(Ⅴ)胁迫下黑藻向体外分泌草酸是其超富集砷的一种重要机制。
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| 关 键 词： | 砷 有机酸 根分泌物 黑藻 竹叶眼子菜 |
| 收稿时间： | 2011/12/7 0:00:00 |
| 修稿时间： | 2012/5/31 0:00:00 |
Effects of arsenic speciations on contents of main organic acids in Hydrilla verticillata and Potamogeton malaianus |
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| ZHONG Zhengyan,WANG Hongbin,WANG Haijuan,SONG Yanhui and LI Hongmei.Effects of arsenic speciations on contents of main organic acids in Hydrilla verticillata and Potamogeton malaianus[J].Acta Ecologica Sinica,2012,32(16):5002-5013. |
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| Authors: | ZHONG Zhengyan WANG Hongbin WANG Haijuan SONG Yanhui and LI Hongmei |
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| Institution: | Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China |
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| Abstract: | |
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| Keywords: | arsenic organic acid root exudates Hydrilla verticillata Potamogeton malaianus |
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