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Sulfur supply reduces cadmium uptake and translocation in rice grains (Oryza sativa L.) by enhancing iron plaque formation, cadmium chelation and vacuolar sequestration.
Environ Pollut. 2018 Jul; 238:76-84.EP

Abstract

Sulfur (S) fertilizer application in rice (Oryza sativa L.) is crucial in determining rice grain productivity and quality. However, little information is available concerning the effect of S supply on cadmium (Cd) uptake and translocation in rice. In this study, both hydroponic and soil experiments were conducted to investigate the influence of S supply on Cd accumulation in rice under two Cd levels (0 and 50 μM), combined with three S concentrations (0, 2.64 and 5.28 mM). The moderate and excessive S supply (2.64 and 5.28 mM) tended to increase plant growth, root length, root and shoot dry weights of rice seedlings, and significantly decreased Cd concentrations in rice plants and grains in the absence or presence of Cd. The subcellular distribution and chemical forms of Cd in roots and shoots also varied with S supply levels. The decreased Cd uptake and translocation in rice grains could be ascribed to the enhanced formation of iron (Fe) plaque on the root surfaces and increased Cd chelation and vacuolar sequestration in roots, since Fe, Mn concentrations in Fe plaque, glutathione and phytochelatins contents, as well as phytochelatin synthase (OsPCS) and tonoplast heavy metal ATPase (OsHMA3) expressions in roots significantly increased with increased S supply. This work provides more insight into the mechanisms of Cd uptake and translocation in rice, and will be helpful for developing strategies to reduce rice grain Cd through S fertilizer application in Cd-contaminated soil.

Authors+Show Affiliations

Rice Product Quality Supervision and Inspection Center, China National Rice Research Institute, Hangzhou, 310006, PR China.Rice Product Quality Supervision and Inspection Center, China National Rice Research Institute, Hangzhou, 310006, PR China.Rice Product Quality Supervision and Inspection Center, China National Rice Research Institute, Hangzhou, 310006, PR China.Rice Product Quality Supervision and Inspection Center, China National Rice Research Institute, Hangzhou, 310006, PR China.Rice Product Quality Supervision and Inspection Center, China National Rice Research Institute, Hangzhou, 310006, PR China. Electronic address: cmingxue@126.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29547864

Citation

Cao, Zhen-Zhen, et al. "Sulfur Supply Reduces Cadmium Uptake and Translocation in Rice Grains (Oryza Sativa L.) By Enhancing Iron Plaque Formation, Cadmium Chelation and Vacuolar Sequestration." Environmental Pollution (Barking, Essex : 1987), vol. 238, 2018, pp. 76-84.
Cao ZZ, Qin ML, Lin XY, et al. Sulfur supply reduces cadmium uptake and translocation in rice grains (Oryza sativa L.) by enhancing iron plaque formation, cadmium chelation and vacuolar sequestration. Environ Pollut. 2018;238:76-84.
Cao, Z. Z., Qin, M. L., Lin, X. Y., Zhu, Z. W., & Chen, M. X. (2018). Sulfur supply reduces cadmium uptake and translocation in rice grains (Oryza sativa L.) by enhancing iron plaque formation, cadmium chelation and vacuolar sequestration. Environmental Pollution (Barking, Essex : 1987), 238, 76-84. https://doi.org/10.1016/j.envpol.2018.02.083
Cao ZZ, et al. Sulfur Supply Reduces Cadmium Uptake and Translocation in Rice Grains (Oryza Sativa L.) By Enhancing Iron Plaque Formation, Cadmium Chelation and Vacuolar Sequestration. Environ Pollut. 2018;238:76-84. PubMed PMID: 29547864.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sulfur supply reduces cadmium uptake and translocation in rice grains (Oryza sativa L.) by enhancing iron plaque formation, cadmium chelation and vacuolar sequestration. AU - Cao,Zhen-Zhen, AU - Qin,Mei-Ling, AU - Lin,Xiao-Yan, AU - Zhu,Zhi-Wei, AU - Chen,Ming-Xue, Y1 - 2018/03/13/ PY - 2017/09/07/received PY - 2018/02/11/revised PY - 2018/02/24/accepted PY - 2018/3/17/pubmed PY - 2018/8/9/medline PY - 2018/3/17/entrez KW - Cadmium KW - Iron plaque KW - Rice (Oryza sativa L.) KW - Sulfur supply KW - Vacuolar sequestration SP - 76 EP - 84 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 238 N2 - Sulfur (S) fertilizer application in rice (Oryza sativa L.) is crucial in determining rice grain productivity and quality. However, little information is available concerning the effect of S supply on cadmium (Cd) uptake and translocation in rice. In this study, both hydroponic and soil experiments were conducted to investigate the influence of S supply on Cd accumulation in rice under two Cd levels (0 and 50 μM), combined with three S concentrations (0, 2.64 and 5.28 mM). The moderate and excessive S supply (2.64 and 5.28 mM) tended to increase plant growth, root length, root and shoot dry weights of rice seedlings, and significantly decreased Cd concentrations in rice plants and grains in the absence or presence of Cd. The subcellular distribution and chemical forms of Cd in roots and shoots also varied with S supply levels. The decreased Cd uptake and translocation in rice grains could be ascribed to the enhanced formation of iron (Fe) plaque on the root surfaces and increased Cd chelation and vacuolar sequestration in roots, since Fe, Mn concentrations in Fe plaque, glutathione and phytochelatins contents, as well as phytochelatin synthase (OsPCS) and tonoplast heavy metal ATPase (OsHMA3) expressions in roots significantly increased with increased S supply. This work provides more insight into the mechanisms of Cd uptake and translocation in rice, and will be helpful for developing strategies to reduce rice grain Cd through S fertilizer application in Cd-contaminated soil. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/29547864/Sulfur_supply_reduces_cadmium_uptake_and_translocation_in_rice_grains__Oryza_sativa_L___by_enhancing_iron_plaque_formation_cadmium_chelation_and_vacuolar_sequestration_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(17)33732-6 DB - PRIME DP - Unbound Medicine ER -