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Arsenate Exposure Affects Amino Acids, Mineral Nutrient Status and Antioxidants in Rice (Oryza sativa L.) Genotypes.
MedLine Citation:
PMID:  21077666     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Simulated pot experiments were conducted on four rice (Oryza sativa L.) genotypes (Triguna, IR-36, PNR-519, and IET-4786) to examine the effects of As(V) on amino acids and mineral nutrient status in grain along with antioxidant response to arsenic exposure. Rice genotypes responded differentially to As(V) exposure in terms of amino acids and antioxidant profiles. Total amino acid content in grains of all rice genotypes was positively correlated with arsenic accumulation. While, most of the essential amino acids increased in all cultivars except IR-36, glutamic acid and glycine increased in IET-4786 and PNR-519. The level of nonprotein thiols (NPTs) and the activities of superoxide dismutase (SOD; EC 1.15.1.1), glutathione reductase (GR; EC 1.6.4.2) and ascorbate peroxidase (APX; EC 1.11.1.11) increased in all rice cultivars except IET-4786. A significant genotypic variation was also observed in specific arsenic uptake (SAU; mg kg(-1)dw), which was in the order of Triguna (134) > IR-36 (71) > PNR-519 (53) > IET-4786 (29). Further, application of As(V) at lower doses (4 and 8 mg L(-1) As) enhanced the accumulation of selenium (Se) and other nutrients (Fe, P, Zn, and S), however, higher dose (12 mg L(-1) As) limits the nutrient uptake in rice. In conclusion, low As accumulating genotype, IET-4786, which also had significantly induced level of essential amino acids, seems suitable for cultivation in moderately As contaminated soil and would be safe for human consumption.
Authors:
S Dwivedi; R D Tripathi; P Tripathi; A Kumar; R Dave; S Mishra; R Singh; D Sharma; U N Rai; D Chakrabarty; P K Trivedi; B Adhikari; M K Bag; O P Dhankher; R Tuli
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Publication Detail:
Type:  Journal Article     Date:  2010-11-15
Journal Detail:
Title:  Environmental science & technology     Volume:  44     ISSN:  1520-5851     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  9542-9     Citation Subset:  IM    
Affiliation:
National Botanical Research Institute, Council of Scientific and Industrial Research, Lucknow-226001, India, Rice Research Station, Department of Agriculture, Chinsurah, Hooghly, West Bengal-712 102, India, and Department of Plant, Soil, and Insect Sciences, University of Massachusetts, French Hall, 230 Stockbridge Road, Amherst Massachusetts 01003-9320, United States.
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