J Agric Food Chem. 2020 Dec 30;68(52):15381-15389. doi: 10.1021/acs.jafc.0c02170. Epub 2020 Dec 15.
Residual pesticides in soil may be taken up by crops and negatively affect food safety. The uptake mechanism of imidacloprid and propiconazole was studied using wheat roots. The factors affecting root uptake were also studied with different crops and in different soils. Imidacloprid and propiconazole were taken up by wheat roots mainly through the symplastic and apoplastic pathways, respectively. Root protein and lipid contents were the main factors affecting the uptake and accumulation of imidacloprid and propiconazole by different crop roots, respectively. The uptake of imidacloprid and propiconazole in soil by wheat plants was linearly correlated with their concentrations in soil pore water, which were governed by soil characteristics. These results are helpful for understanding and estimating crop uptake of residual pesticides in soils.
土壤中的残留农药可能被作物吸收，从而对食品安全产生负面影响。本研究采用小麦根系研究了吡虫啉和丙环唑的吸收机制，并研究了不同作物和不同土壤中影响根系吸收的因素。吡虫啉和丙环唑主要分别通过共质体和质外体途径被小麦根系吸收。根蛋白和脂质含量是影响不同作物根系吸收和积累吡虫啉和丙环唑的主要因素。小麦植株从土壤中吸收吡虫啉和丙环唑与土壤孔道水中的浓度呈线性相关，而土壤孔道水中的浓度则由土壤特性决定。这些结果有助于理解和估计作物对土壤中残留农药的吸收。
