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题名: Uptake by roots and translocation to shoots of polychlorinated dibenzo-p-dioxins and dibenzofurans in typical crop plants
作者: Zhang, Haijun1;  Chen, Jiping1;  Ni, Yuwen1;  Zhang, Qing1;  Zhao, Liang1
通讯作者: 陈吉平
关键词: PCDD/Fs ;  Root uptake ;  Translocation ;  Volatilization ;  Transfer
刊名: CHEMOSPHERE
发表日期: 2009-08-01
DOI: 10.1016/j.chemosphere.2009.05.030
卷: 76, 期:6, 页:740-746
收录类别: SCI
文章类型: Article
部门归属: 1
项目归属: 103
产权排名: 1;1
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: Root uptake and subsequent translocation of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in 12 agricultural crops were comparatively investigated. All crop plants were exposed hydroponically to a mixture of three kinds of dioxin congeners over 4 d. The root concentration factor (RCF) of dioxin showed a logarithmic correlation with extractable lipid content in plant root. On the assumption that the dioxin escaping via gas phase from nutrient solution in the closed container can evenly diffuse in the air and equally absorb onto the shoot tissues of the dioxin-exposed plant and their nearby blank control plant, the amount of translocated dioxin was estimated by subtracting dioxin content in the shoot tissues of the blank control plant from that of the dioxin-exposed plant, and then the transpiration stream concentration factor (TSCF) of dioxin was calculated. The TSCF values of PCDD/Fs largely varied according to the plant species, and the TSCF values of 2,4,8-TrCDF were a little higher than those for 1,3,6,8-TeCDD expect for zucchini. For 1,3,6,8-TeCDD, zucchini had the highest TSCF value of 0.0089, followed by pumpkin (0.0064) towel gourd (0.0027), and cucumber (0.0010), verifying plants of the genus Cucurbita have the higher abilities of dioxin translocation. The TSCF values of 1,3,6,8-TeCDD for wheat and sorghum were 0.0013 and 0.0012, respectively. For maize, soybean, rice, Chinese cabbage, tomato and garland chrysanthemum, translocation was an insignificant mechanism of dioxin contamination in shoot tissues. (C) 2009 Elsevier Ltd. All rights reserved.
关键词[WOS]: WEATHERED P,P'-DDE ;  CONTAMINATED SOILS ;  ORGANIC-CHEMICALS ;  PATHWAYS ;  VEGETATION ;  FOOD ;  PHYTOEXTRACTION ;  BIOAVAILABILITY ;  2,3,7,8-TCDD ;  CUCURBITA
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000269243900003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/102469
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Zhang, Haijun,Chen, Jiping,Ni, Yuwen,et al. Uptake by roots and translocation to shoots of polychlorinated dibenzo-p-dioxins and dibenzofurans in typical crop plants[J]. CHEMOSPHERE,2009,76(6):740-746.
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