Arsenate Exposure Affects Amino Acids, Mineral Nutrient Status and Antioxidants in Rice (<i>Oryza sativa</i> L.) Genotypes

Dwivedi, Sanjay; Tripathi, Rudra Deo; Tripathi, Preeti; Kumar, Amit; Dave, Richa; Mishra, Seema; Rg, Singh; Sharma, Deepika; Rai, U. N.; Chakrabarty, Debasis; Trivedi, Prabodh Kumar; Adhikari, Bijan; Bag, Manas Kumar; Dhankher, Om Prakash; Tuli, Rakesh

doi:10.1021/es101716h

Cited by 131 publications

(50 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This could be due to inter-varietal difference of Fe accumulation with response to As(III) or As(V) and not due to the pretreatments. Similar inter-varietal difference in Fe content has been earlier reported in different rice cultivars (Dwivedi et al 2010). The translocation of both Mn and Zn increased with As(V) treatments in both the cultivars, however, in the tolerant cultivar pretreating plants with H 2 O 2 and H 2 O 2 +SA, the translocation of both the elements decreased in plants with AsV(4) exposure, on the contrary it increased with As(III) exposure.…”

Section: Discussionsupporting

confidence: 86%

H2O2 pretreated rice seedlings specifically reduces arsenate not arsenite: difference in nutrient uptake and antioxidant defense response in a contrasting pair of rice cultivars

Mallick

Kumar

Sinha

et al. 2014

Physiol Mol Biol Plants

View full text Add to dashboard Cite

The study investigated the reduction in metalloid uptake at equimolar concentrations (~53.3 μM) of As(III) and As(V) in contrasting pair of rice seedlings by pretreating with H 2 O 2 (1.0 μM) and SA (1.0 mM). Results obtained from the contrasting pair (arsenic tolerant vs. sensitive) of rice seedlings (cv. Pant Dhan 11 and MTU 7029, respectively) shows that pretreatment of H 2 O 2 and H 2 O 2 + SA reduces As(V) uptake significantly in both the cultivars, while no reduction in the As(III) uptake. The higher growth inhibition, higher H 2 O 2 and TBARS content in sensitive cultivar against As(III) and As(V) treatments along with higher As accumulation (~1.2 mg g −1 dw) than in cv. P11, unravels the fundamental difference in the response between the sensitive and tolerant cultivar. In the H 2 O 2 pretreated plants, the translocation of As increased in tolerant cultivar against AsIII, whereas, it decreased in sensitive cultivar both against AsIII and AsV. In both the cultivars translocation of Mn increased in the H 2 O 2 pretreated plants against As(III), whereas, the translocation of Cu increased against As(V). In tolerant cultivar the translocation of Fe increased against As(V) with H 2 O 2 pretreatment whereas, it decreased in the sensitive cultivar. In both the cultivars, Zn translocation increased against As(III) and decreased against As(V). The higher level of H 2 O 2 and SOD (EC 1.15.1.1) activity in sensitive cultivar whereas, higher, APX (EC 1.11.1.11), GR (EC 1.6.4.2) and GST (EC 1.6.4.2) activity in tolerant cultivar, also demonstrated the differential anti-oxidative defence responses between the contrasting rice cultivars.

show abstract

Section: Discussionsupporting

confidence: 86%

H2O2 pretreated rice seedlings specifically reduces arsenate not arsenite: difference in nutrient uptake and antioxidant defense response in a contrasting pair of rice cultivars

Mallick

Kumar

Sinha

et al. 2014

Physiol Mol Biol Plants

View full text Add to dashboard Cite

show abstract

“…In the recent years yield loss due As toxicity has been recognized as a serious problem affecting the sustainability of food production in South-East Asian countries89. Triguna, a high yielding rice variety of West Bengal, India was chosen for the present study as it is more tolerant to As among other popular varieties37. The accumulation, transformation and thiol complexation of various As species, commonly present in soil and water, was analyzed to unravel mechanism of As metabolism in rice.…”

Section: Discussionmentioning

confidence: 99%

Accumulation and transformation of inorganic and organic arsenic in rice and role of thiol-complexation to restrict their translocation to shoot

Mishra

Mattusch

Wennrich

2017

Sci Rep

View full text Add to dashboard Cite

Environmental contamination of arsenic (As) and its accumulation in rice (Oryza sativa L.) is of serious human health concern. In planta speciation of As is an important tool to understand As metabolism in plants. In the present study, we investigated root to shoot As translocation and speciation in rice exposed to inorganic and methylated As. Arsenate (As . Moreover, in shoots 78% MA III and 71% As III were present as weakly bound species which is alarming, as MA III has been found to be more cytotoxic than As III for human and it could also be an important factor inducing straighthead (spikelet sterility disorder) in rice.Arsenic (As) is ubiquitously present, considered as a non-essential metalloid for plants and animals, and poses serious health hazards to humans. High levels of As in soil and water have been reported around the world through geothermal, mining and industrial activities, agricultural applications and contaminated ground water 1,2 . Ground water of many countries, particularly in the Indian subcontinent, are naturally highly enriched with As and posing toxicity through drinking water and food chain contamination 3,4 . Agricultural fields are the net sink for thousands of tons of As being transferred each year through contaminated irrigation water in these areas 5,6 . The typical As concentration in soil solution of paddy fields varies from 0.01 to 3 μ M, however, as high as 33 μ M As has been reported in a paddy field irrigated with As-laden ground water 7,8 . Further, a significant yield loss has been reported in the crops grown in As contaminated areas 8 . Thus, a threat to the sustainability of food production has been recognized as the other side of the As calamity 8,9 . Understanding the mechanism of As toxicity in plants is crucial to find a sustainable solution to the problem. Arsenic exists in various chemical forms in the environment, which differ considerably in plant uptake, mobility and toxicity. Thus, speciation of As in various plant parts is an important tool to understand the in planta transformation and metabolism of various As species.Inorganic

show abstract

“…The Os07g0258400 and Os07g0257200 genes ( OsNRAMP1 , OsNRAMP5 ) were more down-regulated (3.1 and 2.9 fold) in the AsIII + SNP treatment as compared to the AsIII treatment (1.49 and 2.1 fold) on 4 th day. The previous study indicated that As accumulation also reduced the iron uptake 29 . OsNRAMP and OsPEZ play a key role in uptake and translocation of As, Fe and Cd 30–33 .…”

Section: Resultsmentioning

confidence: 90%

“…Nitrogen and hormone metabolism, as a regulator of plant growth and development, is modulated by heavy metal toxicity and is tightly linked with amino acid and protein metabolism 29, 38 . We, therefore, focused on the analysis of genes involved in amino acid and nitrogen metabolism (Fig.…”

Section: Resultsmentioning

confidence: 99%

Nitric oxide mediated transcriptional modulation enhances plant adaptive responses to arsenic stress

Singh

Indoliya

Chauhan

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Arsenic (As) contamination in rice leads to yield decline and causes carcinogenic risk to human health. Although the role of nitric oxide (NO) in reducing As toxicity is known, NO-mediated genetic modulation in the plant during arsenic toxicity has not yet been established. We analyzed the key components of NO metabolism and the correlations between NO interaction and arsenic stress using rice as a relevant model plant. Illumina sequencing was used to investigate the NO-mediated genome-wide temporal transcriptomic modulation in rice root upon AsIII exposure during 12 days (d) of the growth period. Sodium nitroprusside (SNP) was used as NO donor. SNP supplementation resulted in marked decrease in ROS, cell death and As accumulation during AsIII stress. NO was found to modulate metal transporters particularly NIP, NRAMP, ABC and iron transporters, stress related genes such as CytP450, GSTs, GRXs, TFs, amino acid, hormone(s), signaling and secondary metabolism genes involved in As detoxification. We detected NO-mediated change in jasmonic acid (JA) content during AsIII stress. The study infers that NO reduces AsIII toxicity through modulating regulatory networks involved in As detoxification and JA biosynthesis.

show abstract

Arsenate Exposure Affects Amino Acids, Mineral Nutrient Status and Antioxidants in Rice (Oryza sativa L.) Genotypes

Cited by 131 publications

References 31 publications

H2O2 pretreated rice seedlings specifically reduces arsenate not arsenite: difference in nutrient uptake and antioxidant defense response in a contrasting pair of rice cultivars

H2O2 pretreated rice seedlings specifically reduces arsenate not arsenite: difference in nutrient uptake and antioxidant defense response in a contrasting pair of rice cultivars

Accumulation and transformation of inorganic and organic arsenic in rice and role of thiol-complexation to restrict their translocation to shoot

Nitric oxide mediated transcriptional modulation enhances plant adaptive responses to arsenic stress

Contact Info

Product

Resources

About