Tags

Type your tag names separated by a space and hit enter

Root iron plaque alleviates cadmium toxicity to rice (Oryza sativa) seedlings.
Ecotoxicol Environ Saf. 2018 10; 161:534-541.EE

Abstract

Iron plaque (IP) on root surface can enhance the tolerance of plants to environmental stresses. However, it remains unclear the impact of Fe2+ on cadmium (Cd) toxicity to rice (Oryza sativa) seedlings. In this study, the effects of different Fe2+ and Cd2+ concentration combinations on rice growth were examined hydroponically. Results indicated that Fe2+ concentration up to 3.2 mM did not damage rice roots while induced IP formation obviously. Cd2+ of 10 μM repressed rice growth significantly, while the addition of 0.2 mM Fe2+ to 10 μM Cd2+ solution (Cd+Fe) did not damage rice roots, indicating that Fe2+ could ameliorate Cd toxicity to rice seedlings. Microstructure analysis showed Cd+Fe treatment induced the formation of IP with dense and intricate network structure, Cd adsorption on the root surface was reduced significantly. Cd concentration of rice roots and shoots and Cd translocation from roots to shoots with Fe+Cd treatment were reduced by 34.1%, 36.0% and 20.1%, respectively, in comparison to a single Cd treatment. Noteworthy, the removal of IP resulted in a larger loss of root biomass under Cd treatment. In addition, Cd+Fe treatment increased the activities of root superoxide dismutase and catalase by 105.5% and 177.4%, and decreased H2O2 and O2·- accumulation of rice roots by 56.9% and 35.9%, and recovered Cd-triggered electrolyte leakage obviously, when compared with a single Cd treatment. The results from this experiment indicated that the formed dense IP on rice roots decreased Cd absorption and reactive oxygen species accumulation, and Fe2+ supply alleviated Cd toxicity to rice seedlings.

Authors+Show Affiliations

Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, PR China; College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, PR China.College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, PR China.College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, PR China. Electronic address: hshen@scau.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29929129

Citation

Fu, Youqiang, et al. "Root Iron Plaque Alleviates Cadmium Toxicity to Rice (Oryza Sativa) Seedlings." Ecotoxicology and Environmental Safety, vol. 161, 2018, pp. 534-541.
Fu Y, Yang X, Shen H. Root iron plaque alleviates cadmium toxicity to rice (Oryza sativa) seedlings. Ecotoxicol Environ Saf. 2018;161:534-541.
Fu, Y., Yang, X., & Shen, H. (2018). Root iron plaque alleviates cadmium toxicity to rice (Oryza sativa) seedlings. Ecotoxicology and Environmental Safety, 161, 534-541. https://doi.org/10.1016/j.ecoenv.2018.06.015
Fu Y, Yang X, Shen H. Root Iron Plaque Alleviates Cadmium Toxicity to Rice (Oryza Sativa) Seedlings. Ecotoxicol Environ Saf. 2018;161:534-541. PubMed PMID: 29929129.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Root iron plaque alleviates cadmium toxicity to rice (Oryza sativa) seedlings. AU - Fu,Youqiang, AU - Yang,Xujian, AU - Shen,Hong, Y1 - 2018/06/18/ PY - 2017/11/01/received PY - 2018/06/05/revised PY - 2018/06/07/accepted PY - 2018/6/22/pubmed PY - 2019/6/4/medline PY - 2018/6/22/entrez KW - Cadmium (Cd) KW - Ferrous (Fe(2+)) KW - Iron plaque KW - Reactive oxygen species (ROS) KW - Rice (Oryza sativa) SP - 534 EP - 541 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 161 N2 - Iron plaque (IP) on root surface can enhance the tolerance of plants to environmental stresses. However, it remains unclear the impact of Fe2+ on cadmium (Cd) toxicity to rice (Oryza sativa) seedlings. In this study, the effects of different Fe2+ and Cd2+ concentration combinations on rice growth were examined hydroponically. Results indicated that Fe2+ concentration up to 3.2 mM did not damage rice roots while induced IP formation obviously. Cd2+ of 10 μM repressed rice growth significantly, while the addition of 0.2 mM Fe2+ to 10 μM Cd2+ solution (Cd+Fe) did not damage rice roots, indicating that Fe2+ could ameliorate Cd toxicity to rice seedlings. Microstructure analysis showed Cd+Fe treatment induced the formation of IP with dense and intricate network structure, Cd adsorption on the root surface was reduced significantly. Cd concentration of rice roots and shoots and Cd translocation from roots to shoots with Fe+Cd treatment were reduced by 34.1%, 36.0% and 20.1%, respectively, in comparison to a single Cd treatment. Noteworthy, the removal of IP resulted in a larger loss of root biomass under Cd treatment. In addition, Cd+Fe treatment increased the activities of root superoxide dismutase and catalase by 105.5% and 177.4%, and decreased H2O2 and O2·- accumulation of rice roots by 56.9% and 35.9%, and recovered Cd-triggered electrolyte leakage obviously, when compared with a single Cd treatment. The results from this experiment indicated that the formed dense IP on rice roots decreased Cd absorption and reactive oxygen species accumulation, and Fe2+ supply alleviated Cd toxicity to rice seedlings. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/29929129/Root_iron_plaque_alleviates_cadmium_toxicity_to_rice__Oryza_sativa__seedlings_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0147-6513(18)30504-9 DB - PRIME DP - Unbound Medicine ER -