| 14C-吡虫啉在苗期油菜中的吸收、转运与分布特性 |
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| 引用本文： | 李成名,聂恩光,张素芬,叶庆富.14C-吡虫啉在苗期油菜中的吸收、转运与分布特性[J].核农学报,2021,35(2):438-446. |
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| 作者姓名： | 李成名 聂恩光 张素芬 叶庆富 |
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| 作者单位： | 浙江大学原子核农业科学研究所/农业部核农学重点实验室,浙江杭州310029;浙江大学原子核农业科学研究所/农业部核农学重点实验室,浙江杭州310029;浙江大学原子核农业科学研究所/农业部核农学重点实验室,浙江杭州310029;浙江大学原子核农业科学研究所/农业部核农学重点实验室,浙江杭州310029 |
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| 基金项目： | 国家重点研发计划课题(2016YDF0200201),国家自然科学基金面上项目(11675142) |
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| 摘 要： | 为深入了解吡虫啉在植物体内的行为规律,本研究以14C-吡虫啉为研究对象,采用种衣剂拌种法,设低药种比(4.8和5.4 g·kg-1)以及高药种比(6.0和7.2 g·kg-1)处理,利用同位素示踪技术及现代仪器分析技术,探讨了吡虫啉在苗期甘蓝型油菜中的动态吸收变化和转运分布规律。结果表明,药种比6.0 g·kg-1处理的苗期油菜对吡虫啉的吸收利用率最高;苗期油菜植株体内的吡虫啉含量水平总体表现为高药种比处理显著高于低药种比,而高药种比处理间无显著性差异,且二者吡虫啉含量水平分别维持在4.72~7.96和4.20~9.42 mg·kg-1范围内。低药种比处理的苗期油菜茎中吡虫啉含量显著高于植株其他部位,且下部叶(叶1)明显高于其他叶,其放射性分配比为:茎>叶>根;高药种比处理的茎和叶1中吡虫啉含量均显著高于其他部位,其放射性分配比为:叶>茎>根;各处理组根中14C-吡虫啉的分配比均较低,在9.81%~16.37%范围内;吡虫啉更易在叶缘部位积累。吡虫啉的转运系数均大于1,且随培养时间延长而降低。综上所述,吡虫啉种衣剂处理油菜种子的适宜药种比为6.0 g·kg-1。本研究为吡虫啉的科学使用及其环境安全性评价提供了必要的数据支撑。
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| 关 键 词： | 14C-吡虫啉 吸收 转运 分布 油菜 |
| 收稿时间： | 2019-08-28 |
Uptake,Translocation and Distribution of 14C-Imidacloprid in Rape Seedlings (Brassica napus L.) |
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| LI Chengming,NIE Enguang,ZHANG Sufen,YE Qingfu.Uptake,Translocation and Distribution of 14C-Imidacloprid in Rape Seedlings (Brassica napus L.)[J].Acta Agriculturae Nucleatae Sinica,2021,35(2):438-446. |
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| Authors: | LI Chengming NIE Enguang ZHANG Sufen YE Qingfu |
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| Institution: | Institute of Nuclear-Agricultural Science, Zhejiang University/Key Laboratory of Nuclear-Agricultural Science,Ministry of Agriculture, Hangzhou, Zhejiang 310029 |
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| Abstract: | In order to further understand the behavior of imidacloprid in plants, uptake, translocation and distribution of 14C-Imidacloprid (14C-IMI) in rape seedlings were investigated using isotope tracer method and modern instrumental analysis technology in this study. The experiments were performed by seed-coating treatment with low IMI-seed ratios (4.8 and 5.4 g·kg-1) and high IMI-seed ratios (6.0 and 7.2 g·kg-1). The main results were as follows: Uptake percentage of IMI treated with IMI-seed ratio of 6.0 g·kg-1 was the highest in rape seedlings among all treatments. The content of IMI in rape seedlings with the high IMI-seed ratios was significantly higher than that of the low IMI-seed ratio groups (P<0.05). Furthermore, no significant difference was found between T3 and T4, with the content of IMI in rape seedlings maintaining in the range of 4.72~7.96 and 4.20~9.42 mg·kg-1 respectively. For low IMI-seed ratio groups, the content of IMI in the stem of the plants was significantly higher than that in other parts of the plants, and the IMI content of the oldest leaf (leaf 1) was higher than other leaves. The regular pattern on the distribution of 14C-IMI in the plant was stem > leaf > root. However, for high IMI-seed ratio groups, the content of IMI in stem and leaf 1 was significantly higher than that in other parts, and the 14C-IMI distribution pattern was found to be leaf >stem > root. The distribution ratio of 14C-IMI in the roots was in the range of 9.81%~16.37%; IMI was more accumulated in leaf margins. Transport factors (TF) of IMI were over 1 in all experimental seedlings and decreased with the extension of incubation time. In summary, the IMI-seed ratio of 6.0 g·kg-1 would be suggested for processing rapeseeds. The results of this study provide essential data for guiding the scientific use of IMI in agricultural production and safety evaluation of IMI. |
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| Keywords: | 14C-Imidacloprid uptake translocation distribution rape |
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