Arsenic accumulation in paddy plants at different phases of pre-monsoon cultivation

Chowdhury, Nirmalya; Das, Reshmi; Joardar, Madhurima; Ghosh, Soma; Bhowmick, Subhojit; Roychowdhury, Tarit

doi:10.1016/j.chemosphere.2018.07.041

Cited by 67 publications

(17 citation statements)

References 57 publications

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“…The non-significant influence of irrigation water on the grain As concentrations in this study was perhaps unsurprising given the complexity in the transfer of irrigation water As to rice grain via the soil. For example, the accumulation of As in soil from the irrigation water is dependent on several factors like the temporal variation in As concentration throughout the crop-growth period, the volume of irrigation water used, and the area of the field being irrigated (Chowdhury et al, 2018;Chowdhury et al, 2020). As seen in Figure 2C, there is only a moderate increase in soil As with increase in irrigation water As concentration.…”

Section: Discussionmentioning

confidence: 99%

“…The complexity in the relationship between irrigation water As and grain As could be further enhanced due to irrigation practices which often include the use of both groundwater and rainwater. For example, the phase wise soil As movement and its enrichment pattern in rice due to the use of As contaminated irrigation water showed a moderate accumulation of soil As in the vegetative phase followed by a severe drop in the reproductive phase and continued buildup of As in the ripening phase (Chowdhury et al, 2018). Whereas, in rainfed rice cultivation, a moderate accumulation of As in soil in the vegetative phase followed by a rise in the reproductive phase and a decrease at the ripening stage mainly due to the dilution of the As accumulation in soil due to rainwater was noted (Chowdhury et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

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Meta-Analysis Enables Prediction of the Maximum Permissible Arsenic Concentration in Asian Paddy Soil

Mandal

Sengupta

Sarkar

et al. 2021

Front. Environ. Sci.

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It is now well-established that not just drinking water, but irrigation water contaminated with arsenic (As) is an important source of human As exposure through water-soil-rice transfer. While drinking water As has a permissible, or guideline value, quantification of guideline values for soil and irrigation water is limited. Using published data from 26 field studies (not pot-based experiments) from Asia, each of which reported irrigation water, soil and rice grain As concentrations from the same site, this meta-analysis quantitatively evaluated the relationship between soil and irrigation water As concentrations and the As concentration in the rice grain. A generalized linear regression model revealed As in soil to be a stronger predictor of As in rice than As in irrigation water (beta of 16.72 and 0.6, respectively, p < 0.01). Based on the better performing decision tree model, using soil and irrigation water As as independent variables we determined that Asian paddy soil As concentrations greater than 14 mg kg−1 may result in rice grains exceeding the Codex recommended maximum allowable inorganic As (i-As) concentrations of 0.2 mg kg−1 for polished rice and 0.35 mg kg−1 for husked rice. Both logistic regression and decision tree models, identified soil As as the main determining factor and irrigation water to be a non-significant factor, preventing determination of any guideline value for irrigation water. The seemingly non-significant contribution of irrigation water in predicting grain i-As concentrations below or above the Codex recommendation may be due to the complexity in the relationship between irrigation water As and rice grains. Despite modeling limitations and heterogeneity in meta-data, our findings can inform the maximum permissible As concentrations in Asian paddy soil.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Meta-Analysis Enables Prediction of the Maximum Permissible Arsenic Concentration in Asian Paddy Soil

Mandal

Sengupta

Sarkar

et al. 2021

Front. Environ. Sci.

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“…The distribution of metalloid arsenic is ubiquitous in the environment, which is reported to cause severe stress in rice. Studies by Chowdhury et al, 2018 andDas et al, 2013 have shown the accumulation of As at maximum levels in roots as compared to leaves and stems, as the dosage increases As accumulation increases in a similar manner (Das et al, 2013;Chowdhury et al, 2018). These accumulations occur maximum in the roots followed by stem than in the leaves and least in the economic production.…”

Section: Discussionmentioning

confidence: 87%

Effect of Arsenic Stress on Expression Pattern of a Rice Specific miR156j at Various Developmental Stages and Their Allied Co-expression Target Networks

2020

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In plants, arsenic (As) stress modulates metabolic cascades at various developmental stages by influencing the pattern of gene expressions mediated by small non-coding RNAs, especially Micro-RNAs, involved in the moderation of a myriad of cellular processes needed for plant adaptation upon oxidative stress. miR156j of miR156 gene family, involved mainly in the regulation of growth and development in plants. This study was designed to find out the role of arsenic toxicity on Osa-miR156j expression in all physiological growth stages. To better understand the functional role of Osa-miR156j in rice, we observed the expression in different developmental stages (seedlings, tillering and flowering) and various tissues of leaf, stem and root tissues (at 0, 24, 48, and 72 h) under 25 µM arsenite [As (III)] exposure. Additionally, using bioinformatic tools to target genes of Osa-miR156j and the potential co-expressed genes were explored at different development stages in the various tissues of rice under stress conditions. The expression of Osa-miR156j showed its temporal downregulation in various tissues in different developmental stages. Of note, the downregulation was more pronounced in root tissues at seedlings, tillering, and flowering stages during 0-72 h under arsenite exposure as compared to other tissues. Overall, the As stress altered the gene expression more prominently at seedlings developmental stage followed by flowering and tillering. Additionally, through the In silico approach, the target functions and presence of oxidative stress-responsive cis-acting regulatory elements/motifs also confirmed Osa-miR156j involvement in the regulation of arsenic stress in rice. The findings of this study demonstrate the prominent role of Osa-miR156j in rice under arsenite stress, which was found to modulate the metabolic activities in rice plants at different developmental stages, and thus it might be useful for the development of arsenic tolerant varieties.

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“…Evidently, based on its chemotaxonomic, genomic and metabolic properties, strain IIIJ3-1 represents a novel and non-clonal member of B. cereus group which can act as potential As 3+ accumulator in As contaminated regions. Based on its capability to survive and accumulate the most toxic form of inorganic As (As 3+ ) within its system, the bacterial strain IIIJ3-1 offers a novel mechanism of As 3+ remediation in As-contaminated groundwater as well as heavily contaminated irrigational fields as found in West Bengal [92]. Further investigation is called for standardizing and designing of bioremedial procedures using this highly efficient As biosequestering strain Bacillus IIIJ3-1.…”

Section: Resultsmentioning

confidence: 99%

Molecular and taxonomic characterization of arsenic (As) transforming Bacillus sp. strain IIIJ3–1 isolated from As-contaminated groundwater of Brahmaputra river basin, India

et al. 2020

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Background: Microbe-mediated redox transformation of arsenic (As) leading to its mobilization has become a serious environmental concern in various subsurface ecosystems especially within the alluvial aquifers. However, detailed taxonomic and eco-physiological attributes of indigenous bacteria from As impacted aquifer of Brahmaputra river basin has remained under-studied. Results: A newly isolated As-resistant and-transforming facultative anaerobic bacterium IIIJ3-1 from Ascontaminated groundwater of Jorhat, Assam was characterized. Near complete 16S rRNA gene sequence affiliated the strain IIIJ3-1 to the genus Bacillus and phylogenetically placed within members of B. cereus sensu lato group with B. cereus ATCC 14579(T) as its closest relative with a low DNA-DNA relatedness (49.9%). Presence of iC17:0, iC15:0 fatty acids and menaquinone 7 corroborated its affiliation with B. cereus group, but differential hydroxy-fatty acids, C18:2 and menaquinones 5 & 6 marked its distinctiveness. High As resistance [Maximum Tolerable Concentration = 10 mM As 3+ , 350 mM As 5+ ], aerobic As 3+ (5 mM) oxidation, and near complete dissimilatory reduction of As 5+ (1 mM) within 15 h of growth designated its physiological novelty. Besides O 2 , cells were found to reduce As 5+ , Fe 3+ , SO 4 2− , NO 3 − , and Se 6+ as alternate terminal electron acceptors (TEAs), sustaining its anaerobic growth. Lactate was the preferred carbon source for anaerobic growth of the bacterium with As 5+ as TEA. Genes encoding As 5+ respiratory reductase (arr A), As 3+ oxidase (aioB), and As 3+ efflux systems (ars B, acr3) were detected. All these As homeostasis genes showed their close phylogenetic lineages to Bacillus spp. Reduction in cell size following As exposure exhibited the strain's morphological response to toxic As, while the formation of As-rich electron opaque dots as evident from SEM-EDX possibly indicated a sequestration based As resistance strategy of strain IIIJ3-1.

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Arsenic accumulation in paddy plants at different phases of pre-monsoon cultivation

Cited by 67 publications

References 57 publications

Meta-Analysis Enables Prediction of the Maximum Permissible Arsenic Concentration in Asian Paddy Soil

Meta-Analysis Enables Prediction of the Maximum Permissible Arsenic Concentration in Asian Paddy Soil

Effect of Arsenic Stress on Expression Pattern of a Rice Specific miR156j at Various Developmental Stages and Their Allied Co-expression Target Networks

Molecular and taxonomic characterization of arsenic (As) transforming Bacillus sp. strain IIIJ3–1 isolated from As-contaminated groundwater of Brahmaputra river basin, India

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