Influence of plant root morphology and tissue composition on phenanthrene uptake: stepwise multiple linear regression analysis.
Influence of plant root morphology and tissue composition on phenanthrene uptake: stepwise multiple linear regression analysis.
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DOI：
10.1016/j.envpol.2013.04.033
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发表时间：
2013-08
影响因子：
8.9
通讯作者：
X. Zhan;X. Liang;Guohua Xu;Lixiang Zhou
中科院分区：
文献类型：
--
作者：
X. Zhan;X. Liang;Guohua Xu;Lixiang Zhou
多环芳烃（PAHs）是主要存在于地表土壤中的污染物。植物性食物的膳食摄入量可能对PAH总暴露量做出重大贡献。关于根系形态和植物吸收多环芳烃之间的关系，目前的研究资料很少。了解植物根系的形态和组成因素，影响污染物的根吸收是很重要的，可以告知农业（作物的化学污染）和工程（植物修复）的应用。五种农作物在含有PAH菲的溶液中水培生长。测量1）菲吸收，2）根形态-比表面积、体积、表面积、尖端数和总根长度，和3）根组织组成-水、脂质、蛋白质和碳水化合物含量。通过Pearson相关分析和多元线性回归分析对这些因素进行比较。促进菲吸收的主要因素是比表面积和脂质含量。
Polycyclic aromatic hydrocarbons (PAHs) are contaminants that reside mainly in surface soils. Dietary intake of plant-based foods can make a major contribution to total PAH exposure. Little information is available on the relationship between root morphology and plant uptake of PAHs. An understanding of plant root morphologic and compositional factors that affect root uptake of contaminants is important and can inform both agricultural (chemical contamination of crops) and engineering (phytoremediation) applications. Five crop plant species are grown hydroponically in solutions containing the PAH phenanthrene. Measurements are taken for 1) phenanthrene uptake, 2) root morphology – specific surface area, volume, surface area, tip number and total root length and 3) root tissue composition – water, lipid, protein and carbohydrate content. These factors are compared through Pearson's correlation and multiple linear regression analysis. The major factors which promote phenanthrene uptake are specific surface area and lipid content.