Arsenic tolerances in rice (Oryza sativa) have a predominant role in transcriptional regulation of a set of genes including sulphur assimilation pathway and antioxidant system

Rai, Ankita; Tripathi, Preeti; Dwivedi, Sanjay; Dubey, Sonali; Shri, Manju; Kumar, Smita; Tripathi, Pankaj Kumar; Dave, Richa; Kumar, Amit; Rg, Singh; Adhikari, Bijan; Bag, Manas Kumar; Tripathi, Rudra Deo; Trivedi, Prabodh Kumar; Chakrabarty, Debasis; Tuli, Rakesh

doi:10.1016/j.chemosphere.2010.10.070

Cited by 148 publications

(61 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the lower BCF and TF of As in brown rice with S supply (Table 2) indicates that As translocation from soils and roots to brown rice was inhibited by S. All these results suggested that excessive S induced the transformation of iron plaque may induce As uptake and be trapped in rice roots but can reduce As translocation from roots to shoots and grain. This may be ascribed to S induced expression of genes controlling As accumulation and transport in rice under As stress (Rai et al 2011). Secondly, S supply induced GSH formation in rice (Figure 2), which can react with As forming As-PCs or As-GS complex (Tuli et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Excessive sulfur supply reduces arsenic accumulation in brown rice

Fan¹,

Xia²,

Hu³

et al. 2013

Plant Soil Environ.

View full text Add to dashboard Cite

Arsenic (As), an extremely toxic metalloid pollutant, is distributed in soil through anthropogenic activities, such as pesticide and herbicide application, mining, or irrigation with contaminated groundwater . Rice grown on As-contaminated paddy soil can accumulate high levels of As, approximately 10-fold larger than other cereals (Lombi et al. 2009). Thus, As uptake by rice plants is recognized as a major route of As transfer into food chain which has the potential to become a new disaster for population in Southeast Asia (Heikens et al. 2007). Therefore, it is crucial to understand the mechanism of As uptake by rice and to find strategies for reducing As accumulation in grain for enhanced food safety.Paddy rice (Oryza sativa L.) oxygenates its rhizosphere, resulting in the formation of an iron oxyhydroxide plaque (Hansel et al. 2001 ABSTRACTThe objective of this study was to investigate the influence of excessive sulfur (S) supply on iron plaque formation and arsenic (As) accumulation in rice plants. A combined soil-sand pot experiment was conducted by using two As levels (0, 20 mg/kg) combined with three S concentrations (0, 60, 120 mg/kg). The results showed that excessive S supply significantly decreased As concentration in brown rice, but As concentration in root increased with increasing rate of S supply. Moreover, bioconcentration factors for leaves and stems were 8-35 fold of that for brown rice, indicating that As was mainly accumulated in rice leaves and stems instead of brown rice. Furthermore, excessive S supply significantly decreased translocation factor of As compared to treatment without S supply. These results indicated that excessive S may reduce As translocation from soils and roots to grain. The mechanism could be ascribed to excessive S that induced the decrease of As availability, the increase of iron plaque formation under As stress, and the increase of glutathione in rice leaves and roots. Therefore, excessive S can reduce As accumulation in brown rice exposed to As contaminated soils though it may result in loss of rice yield.

show abstract

Section: Discussionmentioning

confidence: 99%

Excessive sulfur supply reduces arsenic accumulation in brown rice

Fan¹,

Xia²,

Hu³

et al. 2013

Plant Soil Environ.

View full text Add to dashboard Cite

show abstract

“…14,15 Studies suggest that thiol metabolism including sulfur containing peptides play key role in providing resistance against heavy metals. 16,17,18 The primary detoxification strategy against heavy metals employ glutathione (GSH) and phytochelatins (PC) in different plant species such as Arabidopsis, Brassica, Zea mays and rice. [19][20][21][22][23][24] Apart from heavy metals, the role of GSH has also been well documented in providing resistance against other abiotic stresses.…”

mentioning

confidence: 99%

Comprehensive analysis of regulatory elements of the promoters of rice sulfate transporter gene family and functional characterization ofOsSul1;1promoter under different metal stress

Kumar

Asif

Chakrabarty

et al. 2015

Plant Signaling & Behavior

Self Cite

View full text Add to dashboard Cite

“…This formation of compounds can also help to maintain As in the roots and restrict its translocation to the tillers. Arsenite is similar to sulfhydryl groups existing in cysteine residues that have a detrimental effect on the general metabolism of proteins, which increases its toxicity (Rai et al, 2011). Arsenite inhibits pyruvate dehydrogenase by binding to dihydrolipoamide sulfhydryl groups by decreasing the conversion of pyruvate into acetyl-coenzyme A (CoA) en el original tenia una referencia aqui (Bergquist et al, 2009).…”

Section: Arsenic Translocation In Ricementioning

confidence: 99%

“…Zhao et al, 2010;Pan et al, 2014Rahman et al, 2014bRai et al, 2011Hassler, 2014 Tripathi et al, 2013 fraction. The weak correlation between available Fe and iAs in the rice grain could be due to the Fe-Mn-As fractions or pH that influence available Fe (Jiang et al, 2014).…”

Section: Arsenic Translocation In Ricementioning

confidence: 99%