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Uptake, Translocation, and Subcellular Distribution of Azoxystrobin in Wheat Plant (Triticum aestivum L.)
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2019-05-28 00:00:00 , DOI: 10.1021/acs.jafc.9b00361 Chao Ju 1 , Hongchao Zhang 1 , Shijie Yao 1 , Suxia Dong 1 , Duantao Cao 1 , Feiyan Wang 1 , Hua Fang 1 , Yunlong Yu 1
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2019-05-28 00:00:00 , DOI: 10.1021/acs.jafc.9b00361 Chao Ju 1 , Hongchao Zhang 1 , Shijie Yao 1 , Suxia Dong 1 , Duantao Cao 1 , Feiyan Wang 1 , Hua Fang 1 , Yunlong Yu 1
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The uptake mechanism, translocation, and subcellular distribution of azoxystrobin (5 mg kg–1) in wheat plants was investigated under laboratory conditions. The wheat–water system reached equilibrium after 96 h. Azoxystrobin concentrations in roots were much higher than those in stems and leaves under different exposure times. Azoxystrobin uptake by roots was highly linear at different exposure concentrations, while the bioconcentration factors and translocation factors were independent of the exposed concentration at the equilibrium state. Dead roots adsorbed a larger amount of azoxystrobin than fresh roots, which was measured at different concentrations. Azoxystrobin preferentially accumulated in organelles, and the highest distribution proportion was detected in the soluble cell fractions. This study elucidated that the passive transport and apoplastic pathway dominated the uptake of azoxystrobin by wheat roots. Azoxystrobin primarily accumulated in roots and could be acropetally translocated, but its translocation capacity from roots to stems was limited. Additionally, the uptake and distribution of azoxystrobin by wheat plants could be predicted well by a partition-limited model.
中文翻译：
摄取，易位，而在小麦植株嘧菌酯的亚细胞分布（小麦大号。）
嘧菌酯（5 mg kg –1的摄取机制，易位和亚细胞分布在实验室条件下调查了小麦植株中的）。小麦-水系统在96小时后达到平衡。在不同的暴露时间下，根中的Azoxystrobin浓度远高于茎和叶中的浓度。在不同的暴露浓度下，根部对Azoxystrobin的吸收呈高度线性关系，而生物浓度因子和转运因子与平衡状态下的暴露浓度无关。死根比新鲜根吸收的量更多。嘧菌酯优先积累在细胞器中，并且在可溶性细胞级分中检测到最高的分配比例。这项研究阐明了被动运输和质外途径主导了小麦根系对嘧菌酯的吸收。嘧菌酯主要积累在根中，可以进行顶位易位，但其从根到茎的易位能力受到限制。此外，可以通过分区限制模型很好地预测小麦植物对嘧菌酯的吸收和分布。
更新日期：2019-05-28
中文翻译：
摄取，易位，而在小麦植株嘧菌酯的亚细胞分布（小麦大号。）
嘧菌酯（5 mg kg –1的摄取机制，易位和亚细胞分布在实验室条件下调查了小麦植株中的）。小麦-水系统在96小时后达到平衡。在不同的暴露时间下，根中的Azoxystrobin浓度远高于茎和叶中的浓度。在不同的暴露浓度下，根部对Azoxystrobin的吸收呈高度线性关系，而生物浓度因子和转运因子与平衡状态下的暴露浓度无关。死根比新鲜根吸收的量更多。嘧菌酯优先积累在细胞器中，并且在可溶性细胞级分中检测到最高的分配比例。这项研究阐明了被动运输和质外途径主导了小麦根系对嘧菌酯的吸收。嘧菌酯主要积累在根中，可以进行顶位易位，但其从根到茎的易位能力受到限制。此外，可以通过分区限制模型很好地预测小麦植物对嘧菌酯的吸收和分布。
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