文献类型：期刊文献

英文题名：Titanium Dioxide Nanoparticles Alleviate Tetracycline Toxicity to Arabidopsis thaliana (L.)

作者：Liu, Hong[1,2,6] Ma, Chuanxin[2,3,7] Chen, Guangcai[2,4,8] White, Jason C.[3,7] Wang, Zonghua[5,6] Xing, Baoshan[2,9] Dhankher, Om Parkash[2,9]

第一作者：Liu, Hong

通信作者：Xing, BS[1];Dhankher, OP[1];Xing, BS[2];Dhankher, OP[2]

机构：[1]Fujian Agr & Forestry Univ, Coll Resources & Environm Sci, Fujian Prov Key Lab Soil Environm Hlth & Regulat, Fuzhou 350002, Peoples R China;[2]Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA;[3]Connecticut Agr Expt Stn, Dept Analyt Chem, New Haven, CT 06504 USA;[4]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Zhejiang, Peoples R China;[5]Fujian Agr & Forestry Univ, State Key Lab Ecol Pest Control Fujian & Taiwan C, Fuzhou 350002, Peoples R China;[6]15 Shangxiadian Rd, Fuzhou 350002, Fujian, Peoples R China;[7]123 Huntington St, New Haven, CT 06504 USA;[8]73 Daqiao Rd, Hangzhou 311400, Zhejiang, Peoples R China;[9]161 Holdsworth Way, Amherst, MA 01003 USA

年份：2017

卷号：5

期号：4

起止页码：3204-3213

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000398429700047)】；

基金：This research was supported by USDA-AFRI (2011-67006-30181) and USDA-NIFA Hatch program (MAS 00475 and MAS 00401). H.L. gratefully acknowledges the support from China Scholarship Council (201207870010) to study at University of Massachusetts, Amherst.

语种：英文

外文关键词：Arabidopsis thaliana; Titanium oxide Nanoparticles; Tetracycline; Cocontamination; Molecular response; Crop quality

摘要：Arabidopsis thaliana (L.) Heynh. was used as a model plant to investigate the biochemical and molecular response upon coexposures to tetracycline (TC) and titanium oxide nanoparticles (TiO2 NPs). Results showed that 1 mg/L TC severely reduced A. thaliana biomass by 33.3% as compared with the control; however, the presence of 50 and 100 mg/L TiO2 NPs alleviated TC toxicity, increasing fresh biomass by 45% and 28%, respectively, relative to the TC alone treatment. The presence of TC notably decreased Ti accumulation in both shoots and roots. Antioxidant enzyme activity, including superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and peroxidase (POD), in A. thaliana shoots and roots indicated that TC significantly increased the activity of reactive oxygen species (ROS) scavengers. However, in the coexposure treatments, TiO2 NPs reduced antioxidant enzyme activity back to the control levels. The relative expression of genes encoding sulfur assimilation and glutathione biosynthesis pathways was separately measured in shoots and roots. Interestingly, the relative expressions of adenylytransferase (APT), adenosine-5'-phosphosulfate reductase (APR), and sulfite reductase (SiR) in the roots across all three treatments (TC alone, TiO2 NPs alone, and TC X TiO2 NPs treatment) were 2-3.5-fold higher than the control. The expression of gamma-glutamylecysteine synthetase (ECS) and glutathione synthetase (GS) was increased in A. thaliana treated with either TiO2 NPs or TC alone. At harvest, almost 93% reduction of the pod biomass was evident in the TC alone treatment as compared with the control; however, TiO2 NPs increased the pod biomass by 300% in the coexposed plants relative to the TC alone treatment. These findings provide important information for understanding the interactions of metal-based NPs and cocontaminants such as antibiotics in plant systems.