Biochemical and molecular responses underlying differential arsenic tolerance in rice (Oryza sativa L.)

Begum, Most Champa; Islam, Mohammad Saiful; Islam, Monirul; Amin, Ruhul; Parvez, Mohammad Sarwar; Kabir, Ahmad Humayan

doi:10.1016/j.plaphy.2016.03.034

Cited by 115 publications

(51 citation statements)

References 74 publications

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“…Rice contains hydroxymethyl-gluthathione (hm-GSH; having C-terminal Ser instead of Gly) in addition to glutathione (GSH) and induction of PCs and hydroxymethyl-PCs in response to Cd has earlier been reported in rice33. Recent studies have reported that PCs may have role in restricting iAs in rice roots3435. Detoxification of MA V in plants also involves increased production of non-protein thiols36.…”

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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

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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

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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

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“…Reciprocal grafting was performed on newly germinated plants as previously described (Kabir et al, 2013; Begum et al, 2016) before transferring to the solution culture ( Supplementary Figure S2 ). Briefly, the emerging shoot of BR 27 and BR 26 was diagonally cut (45° from the horizontal) 0.5 cm above the germinated seed.…”

Section: Methodsmentioning

confidence: 99%

“…Indole-3-acetic acid (AAA) and Indole-3-butyric acid (IBA) were analyzed by LCMS-2020 equipped with Prominence HPLC system (Shimadzu, Kyoto, Japan) as previously described with some modifications based on a standard curve (Begum et al, 2016; Kabir et al, 2016). Briefly, a mobile-phase column (EZ:faast AAA-MS column 250 × 2.0 mm) was eluted (0.25 mL/min) with (A) 10 mM ammonium formate in water, and (B) 10 mM ammonium formate in methanol.…”

Section: Methodsmentioning

confidence: 99%

“…Origin of these signals could either be in root or shoot before being forwarded to the source of stress to trigger biochemical processes (Kabir et al, 2013; Begum et al, 2016). Reciprocal grafting of pea genotypes previously showed that Fe deficiency signal is generated in the shoot before triggering the tolerance mechanisms in roots (Kabir et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Reciprocal grafting of pea genotypes previously showed that Fe deficiency signal is generated in the shoot before triggering the tolerance mechanisms in roots (Kabir et al, 2013). Again, As-tolerant mechanisms are driven by the signal originated in the roots of rice plants (Begum et al, 2016). To date, the grafting experiment in wheat underlying Fe-toxicity tolerance has never been reported before in the scientific literature.…”

Section: Introductionmentioning

confidence: 99%

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Regulation of Phytosiderophore Release and Antioxidant Defense in Roots Driven by Shoot-Based Auxin Signaling Confers Tolerance to Excess Iron in Wheat

et al. 2016

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Iron (Fe) is essential but harmful for plants at toxic level. However, how wheat plants tolerate excess Fe remains vague. This study aims at elucidating the mechanisms underlying tolerance to excess Fe in wheat. Higher Fe concentration caused morpho-physiological retardation in BR 26 (sensitive) but not in BR 27 (tolerant). Phytosiderophore and 2-deoxymugineic acid showed no changes in BR 27 but significantly increased in BR 26 due to excess Fe. Further, expression of TaSAMS. TaDMAS1, and TaYSL15 significantly downregulated in BR 27 roots, while these were upregulated in BR 26 under excess Fe. It confirms that inhibition of phytosiderophore directs less Fe accumulation in BR 27. However, phytochelatin and expression of TaPCS1 and TaMT1 showed no significant induction in response to excess Fe. Furthermore, excess Fe showed increased catalase, peroxidase, and glutathione reductase activities along with glutathione, cysteine, and proline accumulation in roots in BR 27. Interestingly, BR 27 self-grafts and plants having BR 26 rootstock attached to BR 27 scion had no Fe-toxicity induced adverse effect on morphology but showed BR 27 type expressions, confirming that shoot-derived signal triggering Fe-toxicity tolerance in roots. Finally, auxin inhibitor applied with higher Fe concentration caused a significant decline in morpho-physiological parameters along with increased TaSAMS and TaDMAS1 expression in roots of BR 27, revealing the involvement of auxin signaling in response to excess Fe. These findings propose that tolerance to excess Fe in wheat is attributed to the regulation of phytosiderophore limiting Fe acquisition along with increased antioxidant defense in roots driven by shoot-derived auxin signaling.

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Metabolome Modulation During Arsenic Stress in Plants

Tripathi

2019

Plant-Metal Interactions

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Biochemical and molecular responses underlying differential arsenic tolerance in rice (Oryza sativa L.)

Cited by 115 publications

References 74 publications

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

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

Regulation of Phytosiderophore Release and Antioxidant Defense in Roots Driven by Shoot-Based Auxin Signaling Confers Tolerance to Excess Iron in Wheat

Metabolome Modulation During Arsenic Stress in Plants

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