Scientific reports, 2019-05, Vol.9 (1), p.7397, Article 7397
2019
Details
- Autor(en) / Beteiligte
- Titel
- Effects of exogenous sulfur on alleviating cadmium stress in tartary buckwheat
- Ist Teil von
- Scientific reports, 2019-05, Vol.9 (1), p.7397, Article 7397
- Ort / Verlag
- England: Nature Publishing Group
- Erscheinungsjahr
- 2019
- Link zum Volltext
- Quelle
- Free E-Journal (出版社公開部分のみ）
- Beschreibungen/Notizen
- 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.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 2045-2322eISSN: 2045-2322DOI: 10.1038/s41598-019-43901-4Titel-ID: cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_6517408
- Format
- –
- Schlagworte
- Adenosine triphosphatase, Antioxidants, Ascorbic acid, Cadmium, Cadmium - analysis, Cadmium - metabolism, Cadmium - toxicity, Catalase, Cell walls, Chelation, Fagopyrum - chemistry, Fagopyrum - drug effects, Fagopyrum - physiology, Fertilizers, Gene Expression Regulation, Plant - drug effects, Glutathione - metabolism, Glutathione peroxidase, Glutathione transferase, Heavy metals, L-Ascorbate peroxidase, Leaves, Oxidative stress, Oxidative Stress - drug effects, Peroxidases - metabolism, Phytochelatins, Phytochelatins - metabolism, Plant Leaves - chemistry, Plant Leaves - metabolism, Plant Proteins - metabolism, Plant Roots - chemistry, Plant Roots - metabolism, Plant Shoots - chemistry, Plant Shoots - metabolism, Protein thiols, Roots, Shoots, Soil Pollutants - metabolism, Soil Pollutants - toxicity, Sulfur, Sulfur - pharmacology, Superoxide dismutase, Thiols, Vacuoles, Vacuoles - chemistry, Vacuoles - metabolism