文献类型：期刊文献

英文题名：Functional characterization of a DNA-damage repair/tolerance 100 (DRT100) gene in Sedum alfredii Hance for genome stability maintenance and Cd hypertolerance

作者：Liu, Mingying[1] He, Xuelian[2] Zhuo, Renying[3,4] Mu, Ju[1] Zhang, Dayi[5,6]

第一作者：Liu, Mingying

通信作者：Zhang, DY[1]

机构：[1]Zhejiang Chinese Med Univ, Sch Basic Med Sci, Hangzhou 310053, Peoples R China;[2]Shaanxi Inst Microbiol, Fungal Res Ctr, Xian 710043, Shaanxi, Peoples R China;[3]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[4]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Peoples R China;[5]Jilin Univ, Key Lab Groundwater Resources & Environm, Minist Educ, Changchun 130021, Peoples R China;[6]Jilin Univ, Coll New Energy & Environm, Changchun 130021, Peoples R China

年份：2023

卷号：327

外文期刊名：ENVIRONMENTAL POLLUTION

收录：;EI(收录号：20231413857289);Scopus(收录号：2-s2.0-85151497868);WOS:【SCI-EXPANDED(收录号:WOS:000979755600001)】；

基金：This work was supported by National Natural Science Foundation of China (No. 31870647) .

语种：英文

外文关键词：Cadmium; Hyperaccumulator; DNA-Damage repair; toleration 100 (DRT100); Sedum alfredii Hance

摘要：Cd contamination is a world-wild concern for its toxicity and accumulation in food chain. Sedum alfredii Hance (Crassulaceae) is a zinc (Zn) and cadmium (Cd) hyperaccumulator native to China and widely applied for the phytoremediation at Zn or Cd contaminated sites. Although many studies report the uptake, translocation and storage of Cd in S. alfredii Hance, limited information is known about the genes and underlying mechanisms of genome stability maintenance under Cd stress. In this study, a gene resembling DNA-damage repair/toleration 100 (DRT100) was Cd inducible and designated as SaDRT100. Heterologous expression of SaDRT100 gene in yeasts and Arabidopsis thaliana enhanced Cd tolerance capability. Under Cd stress, transgenic Arabidopsis with SaDRT100 gene exhibited lower levels of reactive oxygen species (ROS), fewer Cd uptake in roots and less Cdinduced DNA damage. Evidenced by the subcellular location in cellular nucleus and expression in aerial parts, we suggested the involvement of SaDRT100 in combating Cd-induced DNA damage. Our findings firstly uncovered the roles of SaDRT100 gene in Cd hypertolerance and genome stability maintenance in S. alfredii Hance. The potential functions of DNA protection make SaDRT100 gene a candidate in genetic engineering for phytoremediation at multi-component contaminated sites.