文献类型：期刊文献

英文题名：Effects of exogenous sulfur on alleviating cadmium stress in tartary buckwheat

作者：Lu, Yang Wang, Qi-fu Li, Jun Xiong, Jiang Zhou, Luo-na He, Sheng-ling Zhang, Jie-qiong Chen, Zhong-ai He, Song-gang Liu, Hui

通信作者：Liu, H[1];Liu, H[2];Liu, H[3]

机构：[1]Guizhou Inst Technol, Coll Food & Pharmaceut Engn, Guiyang 550003, Guizhou, Peoples R China;[2]Guizhou Acad Agr Sci, Guizhou Biotechnol Inst, Guiyang 550006, Guizhou, Peoples R China;[3]Guizhou Key Lab Agr Biotechnol, Guiyang 550006, Guizhou, Peoples R China;[4]Guizhou Gen Stn Crop Technol Promot, Guiyang 550001, Guizhou, Peoples R China

第一机构：贵州理工学院食品药品制造工程学院

通信机构：corresponding author), Guizhou Inst Technol, Coll Food & Pharmaceut Engn, Guiyang 550003, Guizhou, Peoples R China;corresponding author), Guizhou Acad Agr Sci, Guizhou Biotechnol Inst, Guiyang 550006, Guizhou, Peoples R China;corresponding author), Guizhou Key Lab Agr Biotechnol, Guiyang 550006, Guizhou, Peoples R China.|贵州理工学院食品药品制造工程学院;贵州理工学院;

年份：2019

卷号：9

期号：1

外文期刊名：SCIENTIFIC REPORTS

收录：;Scopus(收录号：2-s2.0-85065766387);WOS:【SCI-EXPANDED(收录号:WOS:000467841100001)】；

基金：This study was supported by the Ph. D. Programs Foundation of Guizhou province ([2017] 1180), Youth Fund from Guizhou Academy of Agriculture Science ([2017] 026), and Scientific and Technical Support Programs of Guizhou province ([2017] 2543), and Tackling of Key Agricultural Technology project in Guizhou province(NY[2013] 3017). The authors would like to express sincere gratitude the School of Life Science, Guizhou Normal University, for providing the tartary buckwheat seeds.

语种：英文

摘要：Supplying exogenous sulfur-rich compounds increases the content of glutathione(GSH) and phytochelatins(PCs) in plant tissues, enabling plants to enhance their cellular defense capacity and/or compartmentalize Cadmium(Cd) into vacuoles. However, the mechanism by which surplus S modulates tolerance to Cd stress in different tissues need further investigation. In the present study, we found that supplementing the tartary buckwheat(Fagopyrum tararicum) exposed to Cd with surplus S reversed Cd induced adverse effects, and increased Cd concentrations in roots, but decreased in leaves. Further analysis revealed that exogenous S significantly mitigated Cd-induced oxidative stress with the aids of antioxidant enzymes and agents both in leaves and roots, including peroxidase(POD), ascorbate peroxidase(APX), glutathione peroxidase(GPX), glutathione S-transferase(GST), ascorbic acid(AsA), and GSH, but not superoxide dismutase(SOD) and catalase(CAT). The increased Cd uptake in root vacuoles and decreased translocation in leaves of exogenous S treated plants could be ascribed to the increasing Cd binding on cell walls, chelation and vacuolar sequestration with helps of non-protein thiols(NPT), PCs and heavy metal ATPase 3(FtHMA3) in roots, and inhibiting expression of FtHMA2, a transporter that helps Cd translocation from roots to shoots. Results provide the fundamental information for the application of exogenous S in reversal of heavy metal stress.