Uptake and translocation of triadimefon by wheat (Triticum aestivum L.) grown in hydroponics and soil conditions
Uptake and translocation of triadimefon by wheat (Triticum aestivum L.) grown in hydroponics and soil conditions
复制标题
水培和土壤条件下生长的小麦（Triticum aestivum L.）对三唑酮的吸收和转运
DOI：
10.1016/j.jhazmat.2021.127011
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发表时间：
2021
影响因子：
13.6
通讯作者：
Yunlong Yu
中科院分区：
文献类型：
--
作者：
Yu Sumei;Li Xin;He Shuhong;Zhang Hongchao;Jin Maojun;Zheng Yongquan;Zhang Luqing;Yunlong Yu
土壤中残留的农药可能被植物吸收，对植物生长和食品安全构成威胁。本研究以小麦为模式植物，研究了三嘧酮的吸收及其随后的转运和积累。水培结果表明，小麦根系主要通过胞外途径吸收三嘧唑酮，主要分布在水溶性组分中（66.7 ~ 76.0%）。在被根系吸收后，三唑酮很容易向上转运到小麦的芽和叶片上。有趣的是，三嘧唑酮在开始时主要分布在可溶性部分（52.5%），达到平衡时以47.2%的比例逐渐转移到细胞壁中。小麦植株从土壤中吸收三嘧酮的情况与水培相似。其积累主要受杀菌剂在土壤上的吸附作用控制，并与其在静孔隙水（CIPW）中的浓度呈正相关。因此，cipww可以用于预测小麦对土壤中三嘧酮的吸收。因此，利用分区限制模型可以较好地预测小麦对三唑美酮的吸收。本研究为指导三聚氰胺的实际应用和安全性评价提供了有价值的信息。
Residual pesticides in soil may be taken in by plants and thus have a risk for plant growth and food safety. In this study, uptake of triadimefon and its subsequent translocation and accumulation were investigated with wheat as model plants. The results from hydroponics indicated that triadimefon was absorbed by wheat roots mainly through apoplastic pathway and predominantly distributed into the water soluble fractions (66.7−76.0%). After being uptaken by roots, triadimefon was easily translocated upward to wheat shoots and leaves. Interestingly, triadimefon in leaves was mainly distributed in the soluble fraction by 52.5% at the beginning, and gradually transferred into the cell wall by 47.2% at equilibrium. The uptake of triadimefon from soils by wheat plants was similar to that in hydroponics. Its accumulation were mainly governed by adsorption of the fungicide onto soils, and positively correlated with its concentration inin situpore water (CIPW). Thus, CIPWcan be suitable for predicting the uptake of triadimefon by wheat from soils. Accordingly, uptake of triadimefon by wheat was predicted well by using the partition-limited model. Our study provides valuable information for guiding the practical application and safety evaluation of triadimefon.