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Accumulation and distribution of polycyclic aromatic hydrocarbons in rice (Oryza sativa)

机译：水稻中多环芳烃的积累与分布

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Various tissues of rice plants were sampled from a PAH contaminated site in Tianjin, China at different growth stages of the ripening period and analyzed for PAHs. PAHs were much higher in roots than in the exposed tissues. Grains and internodes accumulated much smaller amounts of PAHs than leaves, hulls or ear axes. No specific gradient trends along roots, stem, ear axes, and grains were observed, suggesting that systematic translocation among them is unlikely. Over the ripening period, PAH concentrations were increased in rice roots and decreased in most above-ground tissues. Significant correlations between PAH and lipid contents can only be observed during full mature stage. The spectra of individual PAH compounds in rice organs including roots were similar to those in air, rather than those in soil. There was also a significant correlation between bioconcentration factor (BCF, plant over air) and octanol/air partitioning coefficient (K_(oa)).
机译：在成熟期的不同生长阶段，从位于中国天津的一个受PAH污染的地点采样了水稻的各种组织，并分析了PAHs。根中的PAHs远高于裸露的组织。谷物和节间积累的PAH量比叶，壳或耳轴少得多。没有观察到沿根，茎，耳轴和籽粒的特定梯度趋势，这表明它们之间不可能系统地移位。在成熟期间，稻根中的PAH浓度增加，而大多数地上组织中的PAH浓度则下降。 PAH和脂质含量之间的显着相关性只能在完全成熟阶段观察到。包括根部在内的水稻器官中单个PAH化合物的光谱类似于空气中的光谱，而不是土壤中的光谱。生物浓缩因子（BCF，植物在空气中）与辛醇/空气分配系数（K_（oa））之间也存在显着相关性。

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