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Iron plaque decreases cadmium accumulation in Oryza sativa L. and serves as a source of iron.
Plant Biol (Stuttg). 2016 Nov; 18(6):1008-1015.PB

Abstract

Cadmium (Cd) contamination occurs in paddy soils; hence it is necessary to reduce Cd content of rice. Application and mode of action of ferrous sulphate in minimizing Cd in rice was monitored in the present study. Pot culture with Indian rice variety Swarna (MTU 7029) was maintained in Cd-spiked soil containing ferrous sulphates, which is expected to reduce Cd accumulation in rice. Responses in rhizosphere pH, root surface, metal accumulation in plant and molecular physiological processes were monitored. Iron plaque was induced on root surfaces after FeSO4 application and the amount of Fe in plaque reduced with increases in Cd in the soil. Rhizosphere pH decreased during plaque formation and became more acidic due to secretion of organic acids from the roots under Cd treatment. Moreover, iron chelate reductase activity increased with Cd treatment, but in the absence of Cd, activity of this enzyme increased in plaque-induced plants. Cd treatment caused expression of OsYSL18, whereas OsYSL15 was expressed only in roots without iron plaque. Fe content of plants increased during plaque formation, which protected plants from Cd-induced Fe deficiency and metal toxicity. This was corroborated with increased biomass, chlorophyll content and quantum efficiency of photo-synthesis among plaque-induced plants. We conclude that ferrous sulphate-induced iron plaque prevents Cd accumulation and Fe deficiency in rice. Iron released from plaque via organic acid mediated dissolution during Cd stress.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Sebastian A
Department of Plant Sciences, University of Hyderabad, Hyderabad, India.
Prasad MN
Department of Plant Sciences, University of Hyderabad, Hyderabad, India. mnvsl@uohyd.ac.in.

MeSH

BiomassCadmiumFerrous CompoundsHydrogen-Ion ConcentrationIronOryzaPhotosynthesisRhizosphereSoilStress, Physiological

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27439383

Citation

Sebastian, A, and M N V. Prasad. "Iron Plaque Decreases Cadmium Accumulation in Oryza Sativa L. and Serves as a Source of Iron." Plant Biology (Stuttgart, Germany), vol. 18, no. 6, 2016, pp. 1008-1015.
Sebastian A, Prasad MN. Iron plaque decreases cadmium accumulation in Oryza sativa L. and serves as a source of iron. Plant Biol (Stuttg). 2016;18(6):1008-1015.
Sebastian, A., & Prasad, M. N. (2016). Iron plaque decreases cadmium accumulation in Oryza sativa L. and serves as a source of iron. Plant Biology (Stuttgart, Germany), 18(6), 1008-1015. https://doi.org/10.1111/plb.12484
Sebastian A, Prasad MN. Iron Plaque Decreases Cadmium Accumulation in Oryza Sativa L. and Serves as a Source of Iron. Plant Biol (Stuttg). 2016;18(6):1008-1015. PubMed PMID: 27439383.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Iron plaque decreases cadmium accumulation in Oryza sativa L. and serves as a source of iron. AU - Sebastian,A, AU - Prasad,M N V, Y1 - 2016/09/03/ PY - 2016/06/18/received PY - 2016/07/15/accepted PY - 2016/10/21/pubmed PY - 2017/2/23/medline PY - 2016/7/22/entrez KW - Cadmium accumulation KW - cadmium stress KW - iron plaque KW - iron uptake KW - photosynthesis KW - rhizosphere pH SP - 1008 EP - 1015 JF - Plant biology (Stuttgart, Germany) JO - Plant Biol (Stuttg) VL - 18 IS - 6 N2 - Cadmium (Cd) contamination occurs in paddy soils; hence it is necessary to reduce Cd content of rice. Application and mode of action of ferrous sulphate in minimizing Cd in rice was monitored in the present study. Pot culture with Indian rice variety Swarna (MTU 7029) was maintained in Cd-spiked soil containing ferrous sulphates, which is expected to reduce Cd accumulation in rice. Responses in rhizosphere pH, root surface, metal accumulation in plant and molecular physiological processes were monitored. Iron plaque was induced on root surfaces after FeSO4 application and the amount of Fe in plaque reduced with increases in Cd in the soil. Rhizosphere pH decreased during plaque formation and became more acidic due to secretion of organic acids from the roots under Cd treatment. Moreover, iron chelate reductase activity increased with Cd treatment, but in the absence of Cd, activity of this enzyme increased in plaque-induced plants. Cd treatment caused expression of OsYSL18, whereas OsYSL15 was expressed only in roots without iron plaque. Fe content of plants increased during plaque formation, which protected plants from Cd-induced Fe deficiency and metal toxicity. This was corroborated with increased biomass, chlorophyll content and quantum efficiency of photo-synthesis among plaque-induced plants. We conclude that ferrous sulphate-induced iron plaque prevents Cd accumulation and Fe deficiency in rice. Iron released from plaque via organic acid mediated dissolution during Cd stress. SN - 1438-8677 UR - https://www.unboundmedicine.com/medline/citation/27439383/Iron_plaque_decreases_cadmium_accumulation_in_Oryza_sativa_L__and_serves_as_a_source_of_iron_ DB - PRIME DP - Unbound Medicine ER -