Uptake of polycyclic aromatic hydrocarbons by maize plants
Uptake of polycyclic aromatic hydrocarbons by maize plants
复制标题
玉米植物对多环芳烃的吸收
DOI：
10.1016/j.envpol.2006.11.026
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发表时间：
2007-07-01
影响因子：
8.9
通讯作者：
Coveney, R. M.
中科院分区：
文献类型：
--
作者：
Lin, H.;Tao, S.;Coveney, R. M.
Roots and above-ground parts (tops) of maize plants, comprising cuticles, leaves and stems, have been exposed separately to polycyclic aromatic hydrocarbons (PAHs) by means of air-tight bicameral exposure devices. Maize roots and tops of plants directly accumulate PAHs from aqueous solutions and from air in proportion to exposure levels. Root and leaf concentration factors (log RCF and log LCF) are log-linear functions of log-based octanol-water partition coefficient (log Kow) and log-based octanol-air partition coefficient (log Koa). The PAHs' concentrations among cuticles, leaves and stems display good correlations with each other. PAH concentrations in each part of the plant tested correlated positively with atmospheric PAHs' concentrations. Comparisons between PAHs' concentrations of root epidermis and root tissue showed similar correlations. Bulk concentrations of contaminants in various plant tissues differed greatly, but these differences disappeared after normalization to lipid contents suggesting lipid-based partitioning of PAHs among maize tissues. (c) 2006 Elsevier Ltd. All rights reserved.
