+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Oxic and anoxic conditions affect arsenic (As) accumulation and arsenite transporter expression in rice

Oxic and anoxic conditions affect arsenic (As) accumulation and arsenite transporter expression in rice

Chemosphere 168: 969-975

Arsenic (As) exposure from rice consumption has now become a global health issue. This study aimed to investigate the effects of rice rhizosphere oxic conditions on silicate transporter (responsible for arsenite transportation) expressions, and on As accumulation and speciation in four rice genotypes, including two hybrid genotypes (Xiangfengyou9, Shenyou9586) and two indica subspecies (Xiangwanxian17, Xiangwanxian12). Oxic and anoxic treatments have different effects on root length (p < 0.001) and weight (p < 0.05). Total As concentrations in roots were dramatically lower in oxic treatments (88.8-218 mg/kg), compared to anoxic treatments (147-243 mg/kg) (p < 0.001). Moreover, root and shoot arsenite concentrations in oxic treatments were lower than that in anoxic treatments in arsenite treatments. The relative abundance of silicate transporter expressions displayed a trend of down-regulation in oxic treatments compared to anoxic treatments, especially significantly different for Xiangwanxian17, Xiangwanxian12 in Lsi1 expressions (p < 0.05), Xiangfengyou9, Shenyou9586, Xiangwanxian17 in Lsi2 expressions (p < 0.05). However, there were no significant differences of transporter expressions in different As treatments and genotypes. It may be a possible reason for low As accumulation in rice growing aerobically compared to flooded condition and a potential route to reduce the health risk of As in rice.

(PDF emailed within 0-6 h: $19.90)

Accession: 058488135

Download citation: RISBibTeXText

PMID: 27817896

DOI: 10.1016/j.chemosphere.2016.10.114

Related references

Do aeration conditions affect arsenic and phosphate accumulation and phosphate transporter expression in rice (Oryza sativa L.)?. Environmental Science and Pollution Research International 25(1): 43-51, 2016

Sorption of arsenic under oxic and anoxic conditions; possible origins of elevated arsenic in groundwater. Geochimica et Cosmochimica Acta 71(15S): A450, 2007

Do Si/As ratios in growth medium affect arsenic uptake, arsenite efflux and translocation of arsenite in rice (Oryza sativa)?. Environmental Pollution 229: 647-654, 2017

Expression of rice MATE family transporter OsMATE2 modulates arsenic accumulation in tobacco and rice. Plant Molecular Biology 98(1-2): 101-120, 2018

Transporters of arsenite in rice and their role in arsenic accumulation in rice grain. Proceedings of the National Academy of Sciences of the United States of America 105(29): 9931-9935, 2008

Expressing ScACR3 in rice enhanced arsenite efflux and reduced arsenic accumulation in rice grains. Plant and Cell Physiology 53(1): 154-163, 2012

Does anoxia affect organic matter preservation? Diagenesis and burial of the major biochemicals under oxic and anoxic depositional conditions. Abstracts with Programs - Geological Society of America 24(7): 20, 1992

Genotypic difference in temporal variation of arsenic accumulation and expression of silicon efflux transporter (LSi2) gene in the field grown rice. Indian Journal of Genetics and Plant Breeding 73(1): 94-97, 2013

Arsenite-induced changes in abundance and expression of arsenite transporter and arsenite oxidase genes of a soil microbial community. Research in Microbiology 164(5): 457-465, 2013

Decreasing arsenic accumulation in rice by overexpressing OsNIP1;1 and OsNIP3;3 through disrupting arsenite radial transport in roots. New Phytologist 219(2): 641-653, 2018

Anoxic-dysoxic-oxic conditions in the Cenomanian Agua Nueva Formation Upper Cretaceous in central Mexico, and their relation to oceanic anoxic event 2 OAE 2. Geological Society of America 43.5, 2011

Mitigation of arsenic toxicity and accumulation in hydroponically grown rice seedlings by co-inoculation with arsenite-oxidizing and cadmium-tolerant bacteria. Ecotoxicology and Environmental Safety 162: 591-602, 2018

Arsenic accumulation by aquatic macrophyte coontail (Ceratophyllum demersum L.) exposed to arsenite, and the effect of iron on the uptake of arsenite and arsenate. Environmental and Experimental Botany 83: 47-52, 2012

Arsenic and selenium species in the oxic and anoxic waters of the Oslofjord, Norway. Ine Pollution Bulletin. 31(1-3): 116-126, 1995

Effect of arsenite-oxidizing bacterium B. laterosporus on arsenite toxicity and arsenic translocation in rice seedlings. Ecotoxicology and Environmental Safety 120: 7-12, 2016