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《Journal of Nuclear Agricultural Sciences》 2009-04
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UPTAKE,TRANSLOCATION,AND DISTRIBUTION OF ROOT-APPLIED [C ring-U-~(14)C]-ZJ0273 IN PLANTS OF OILSEED RAPE AND RICE

LI Zheng~1 HAN Ai-liang~1 ZHANG Yan-fei~1 LI Ju-ying~1 WANG Yue~1WANG Hai-yan~1 YE Qing-fu~1 LU Long~2(1.Institute of Nuclear-Agricultural Science/Key Laboratory of Nuclear-Agricultural Science,Ministry of Agriculture,Zhejiang University,Hangzhou,Zhejiang 310029;2.Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,Shanghai 200032)  
ZJ0273,propyl 4-(2-(4,6-dimethoxypyrimidin-2-yloxy)benzylamino)benzoate,is a novel ALS-inhibited herbicide development for pre-and post-emergence weed control in field of oilseed rape.The comparative uptake,translocation and distribution of root-applied [C ring-U- ~(14)C]-ZJ0273 in the plants of susceptible rice and tolerant oilseed rape were investigated under laboratory conditions.The results showed that the uptake of [C ring-U- ~(14)C]-ZJ0273 in both rice(Oryza sativa L.) and oilseed rape(Brassica napus L.) increased with time.Larger percentage of the applied ZJ0273 was uptaken by rice than oilseed rape at any sampling time.At 384 hours after treatment,the uptake of [C ring-U- ~(14)C]-ZJ0273 reached 24.1% of the applied amount in rice,while only 4.1% of the applied in oilseed rape.The majority of the absorbed ZJ0273 remained in the root of the tested plants,which indicated the weak mobility of ZJ0273 and/or its metabolites in both the plants of susceptible rice and tolerant oilseed rape.The radioactivity per unit of dry weight in the roots and leaves of rice was 9.470 Bq/mg and 0.910 Bq/mg,respectively,which was significantly higher than that in oilseed rape(3.870 Bq/mg and 0.390 Bq/mg).Therefore,the difference in the total uptake of ZJ0273 and the accumulation of ZJ0273 and/or its metabolites perunit of dry weight between rice and oilseed rape,which revealed in this study,might be one of the reasons for the different susceptibility of rice and oilseed rape on ZJ0273.
【Fund】: 国家自然科学基金项目(面上项目10775118 重点项目20632070);; 农业部公益性行业科研专项-核技术农业应用(200803034);; 中科院知识创新工程重要方向项目(KGCX3-SYW-203-03)
【CateGory Index】: S451.2
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