Toxicity of different forms of antimony to rice plant: Effects on root exudates, cell wall components, endogenous hormones and antioxidant system
| Autor: | WenXiang Chen, YanMing Zhu, Zhilian Fan, LiZhen Wang, Lei Lei, JunMing Su, RuiRui Zhang, Renwei Feng, Bixiu Liu, JiaXin Dai, Hong Liu, RenJie Wang, YuanPing Li, ZiTing Lin, Christopher Rensing |
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| Rok vydání: | 2020 |
| Předmět: |
Antimony
Environmental Engineering Antioxidant 010504 meteorology & atmospheric sciences medicine.medical_treatment Antimonite Oxalic acid chemistry.chemical_element 010501 environmental sciences Plant Roots 01 natural sciences Antioxidants Superoxide dismutase chemistry.chemical_compound Cell Wall medicine Environmental Chemistry Waste Management and Disposal Abscisic acid 0105 earth and related environmental sciences biology food and beverages Oryza APX Pollution chemistry biology.protein Salicylic acid Nuclear chemistry |
| Zdroj: | Science of The Total Environment. 711:134589 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2019.134589 |
| Popis: | Antimony (Sb) is a toxic element for both human and plants, but the toxic responses of plants to different forms of antimony and the associated mechanisms are unknown. This study was carried out to investigate the effects of different forms of Sb [Sb(III) and Sb(V)] on the root exudates, root endogenous hormones, root cell wall components and antioxidant systems in rice plant via three hydroponic experiments. The results showed that Sb(III) displayed a higher toxicity than Sb(V) to the plant which accumulated much more Sb in its tissues under Sb(III) exposure than that under Sb(V) exposure. Under Sb(III) exposure, most of absorbed Sb was found to be Sb(III) in the shoots and roots; however when plants were exposed to Sb(V), most of absorbed Sb in this rice plant was Sb(V). Only two kinds of endogenous hormones were detected as abscisic acid (ABA) and salicylic acid (SA). The addition of Sb(III) significantly increased the content of ABA but Sb(V) did not, probably suggesting the higher toxicity of Sb(III) than Sb(V) might be due to the stimulation of ABA content. The addition of Sb(III) significantly increased the concentration of oxalic acid but decreased the concentrations of formic, acetic and maleic acids. Sb(V) also enhanced the oxalic acid concentration at 20 mg L−1 Sb(V) treatment level but reduced the concentrations of formic and acetic acids. Different forms of Sb dose-dependently increased the content of pectin, but significantly enhanced the content of lignin in cell wall. Different forms of Sb induced oxidative stress, but rice plant triggered the activities of superoxide dismutase (SOD) and ascorbate peroxidase (APX) to counteract the oxidative stress. |
| Databáze: | OpenAIRE |
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