Root uptake, translocation, and subcellular distribution of six pesticides (dinotefuran, thiamethoxam, imidacloprid, imazethapyr, propiconazole, and chlorpyrifos) with K_ow ranging from −0.549 to 4.7 were investigated in wheat to study transportation and accumulation of pesticides. The root bioconcentration factor (RCF) of pesticides decreased with water solubility (R² = 0.6121) and increased with hydrophobicity (when the pH-adjusted log K_ow > 2, R² = 0.925), respectively. The translocation of neutral pesticides from roots to shoots increased positively with water solubility (R² > 0.6484) but decreased with hydrophobicity (R² > 0.8039). The subcellular fraction concentration factor (SFCF) increased linearly with hydrophobicity of the tested pesticides (R² > 0.958). The log RCF was positively correlated with log SFCF in root cell walls (R² = 0.9894) and organelles (R² = 0.9786). Transportation of the pesticides from roots to stems and stems to leaves was adversely affected by the log SFCF of cell walls and organelles of roots (R² > 0.7997) and stems (R² > 0.6666), respectively. Hydrophobicity-dependent SFCF is a factor governing accumulation of pesticides in roots after uptake and their subsequent upward translocation.

在小麦中调查了K _ow为-0.549至4.7的六种农药（敌豆呋喃，噻虫嗪，吡虫啉，咪唑乙烟，丙环唑和毒死rif ）的根吸收，易位和亚细胞分布，以研究农药的运输和积累。农药的根部生物富集系数（RCF）随水溶性（R ²  = 0.6121）降低而随疏水性（pH值经过调整的log K _ow  > 2，R ²  = 0.925）升高。中性农药从根向芽的迁移随水溶性（R ²  > 0.6484）正增加而随着疏水性（R²  > 0.8039）。亚细胞部分浓度因子（SFCF）随被测农药的疏水性线性增加（R ²  > 0.958）。在根细胞壁（R ²  = 0.9894）和细胞器（R ²  = 0.9786）中，log RCF与log SFCF正相关。农药从根到茎，从茎到叶的运输分别受到根的细胞壁和细胞器的log SFCF（R ²  > 0.7997）和茎（R ²  > 0.6666）的不利影响。疏水性依赖的SFCF是控制农药吸收后根部向上累积移位的因素。