A study on soil-environmental quality criteria and standards of arsenic

Zhou, Qixing; Teng, Yanguo; Liu, Yang

doi:10.1016/j.apgeochem.2016.05.001

Cited by 38 publications

(10 citation statements)

References 65 publications

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“…Compared with the other major cereals, rice takes up large amounts of arsenic (As), a highly toxic class I carcinogenic metalloid, which naturally occurs worldwide in the environment and is widely distributed in Earth’s crust (Liu et al 2012a). Rivers originating from the greater Himalayas carry As from their rock sediments to the densely populated rice-growing plains of South and Southeast Asia, making the major rice-growing belt of Asia vulnerable to As contamination (Sohn 2014; Zhou et al 2017). In addition, climate change is threatening rice production in these areas.…”

Section: Introductionmentioning

confidence: 99%

Mapping of genomic regions associated with arsenic toxicity stress in a backcross breeding populations of rice (Oryza sativa L.)

Murugaiyan

Ali

Mahender

et al. 2019

Rice

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Background Arsenic (As) is an unwanted toxic mineral that threatens the major rice-growing regions in the world, especially in South Asia. Rice production in Bangladesh and India depends on As-contaminated groundwater sources for irrigating paddy fields, resulting in elevated amounts of As in the topsoil. Arsenic accumulating in rice plants has a significant negative effect on human and animal health. Here, we present a quantitative trait locus (QTL) mapping study to identify candidate genes conferring As toxicity tolerance and accumulation in rice ( Oryza sativa L . ) seedlings. An early backcross breeding population consisting of 194 lines derived from a cross between WTR1 ( indica) and Hao-an-nong (japonica ) was grown in hydroponics for 25 days, from the seventh day exposed to an environmentally relevant concentration of 10 ppm As. Results Arsenic toxicity leads to significantly negative plant responses, including reduced biomass, stunted plant growth, reduced leaf chlorophyll content, and increased shoot As concentration ranging from 9 to 20 mg kg − 1 . Marker-trait association was determined for seven As-related traits using 704 single nucleotide polymorphism (SNP) markers generated from a 6 K SNP-array. One QTL was mapped on chromosome 1 for relative chlorophyll content, two QTLs for As content in roots were mapped on chromosome 8, and six QTLs for As content in shoots were mapped on chromosomes 2, 5, 6, and 9. Using the whole-genome sequence of the parents, we narrowed down the number of candidate genes associated with the QTL intervals based on the existence of a non-synonymous mutation in genes between the parental lines. Also, by using publicly available gene expression profiles for As stress, we further narrowed down the number of candidate genes in the QTL intervals by comparing the expression profiles of genes under As stress and control conditions. Twenty-five genes showing transcription regulation were considered as candidate gene nominees for As toxicity-related traits. Conclusions Our study provides insight into the genetic basis of As tolerance and uptake in the early seedling stage of rice. Comparing our findings with the previously reported QTLs for As toxicity stress in rice, we identified some novel and co-localized QTLs associated with As stress. Also, the mapped QTLs harbor gene models of known function associated with stress responses, metal homeostasis, and transporter activity in rice. Overall, our findings will assist breeders with initial marker information to develop suitable varieties for As-contaminated ecosystems. Electronic supplementary material The online version of this article (10.1186/s12284-019-0321-y) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

Mapping of genomic regions associated with arsenic toxicity stress in a backcross breeding populations of rice (Oryza sativa L.)

Murugaiyan

Ali

Mahender

et al. 2019

Rice

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“…Various methods for remediation of contaminated soils have been developed and could be applied for this studied soils, including physical, chemical, and biological methods, especially phytoremediation and ecological remediation (Zhou & Song, 2004;Zhou, Teng, & Lin, 2013;Zhou, Teng, & Liu, 2017). Currently, some actions have been suggested to treat some metals, such as As (metalloid), Ti (transition metal, the northern area inside of the campus), and Cd (heavy metal; the southern area outside of the campus).…”

Section: Characteristics Of Metal Pollutionmentioning

confidence: 99%

“…Currently, some actions have been suggested to treat some metals, such as As (metalloid), Ti (transition metal, the northern area inside of the campus), and Cd (heavy metal; the southern area outside of the campus). Various methods for remediation of contaminated soils have been developed and could be applied for this studied soils, including physical, chemical, and biological methods, especially phytoremediation and ecological remediation (Zhou & Song, 2004;Zhou, Teng, & Lin, 2013;Zhou, Teng, & Liu, 2017). Specifically, for the removal of As and Cd, the developed methods include As/Cd hyperaccumulators (Pteris vittata, Solanum nigrum, and Mirabilis jalapa), soil washing techniques using agents (tannic acid, oxalate, and EDTA), and microbial fuel cells (da Silva et al, 2018;Gusiatin, Klik, & Kulikowska, 2019;Gustave et al, 2018;Liu, Xin, & Zhou, 2018;Wei et al, 2010;Wei et al, 2018).…”

Section: Characteristics Of Metal Pollutionmentioning

confidence: 99%

Metal status in soils within a developing education park: Potential risk of land development

Teng

2019

Land Degrad Dev

Self Cite

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Many countries have developed university/college towns with specific characteristics (temporal, spatial, structural, and functional aspects). During the land development, there were obvious changes in soil metal levels and distribution patterns attributed to anthropogenic activities, thus having induced comparable results in university/college towns due to similar anthropogenic activities. Until now, specific studies on the metal status in university/college towns, especially the variation inside and outside of a campus were rarely involved. Herin we report on 109 soil samples around a new campus within a developing education park, in which the levels, spatial distributions, and possible sources of (alkali, alkaline-earth, transition, and main group) metals and metalloids (Cd, Cr, As, Pb, Zn, Cu, Mn, Ba, Ni, Ti, Be, Bi, Sb, Sn, Co, V, and Zr) were systematically investigated. The Nemerow pollution indexes, spatial analysis, principal components analysis, and cluster analysis were calculated and analyzed. The results showed that the level of most metals within the campus with different functional areas (college, activity, and greening areas) was 1-1.3-times as much as that outside in four directions and had greater variations. Moreover, the level of most metals was 1-1.5-times as much as their background value and they distributed in the areas under specific developments and might mainly be attributed to anthropogenic sources. These findings provide the knowledge about effects of land development and anthropogenic activities on soil metal status that could be used by university/college towns in the similar context around the world. KEYWORDS education park, land development, metal variation, university/college town

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“…Generally, ecotoxicological and geochemical methods are widely adopted (Wu et al 1991;Zhou 1996;Zhou and Zhu 1997). For example, certain methods based on the species sensitivity distribution (SSD) or the assessment factor (AF) have been applied in derivation of quality criteria since the 1980s (US EPA 1985), and are becoming useful tools to deal with toxicological indexes in derivation (DEPA 1997;Zhou et al 2017). The Netherlands is a leading country on SEQS development.…”

Section: Derivation Of Seqssmentioning

confidence: 99%

Overview on current criteria for heavy metals and its hint for the revision of soil environmental quality standards in China

Chen

Wang

et al. 2018

Journal of Integrative Agriculture

114

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Following rapid social and economic development over the past several decades, soil pollution by heavy metals (HMs) has been both serious and widespread in China. The Soil Environmental Quality Standards (SEQSs) in China (GB 15618-1995) have been introduced to encourage and enforce sustainable soil HM management. However, in recent years, HM contents in soils have frequently been found to exceed their associated standard values, while the crops growing on them might still meet regulatory standards, and vice versa. There is thus growing awareness that GB 15618-1995 does not effectively regulate current soil HM pollution, as it has encountered bottlenecks, and disappointing outcomes caused by poor execution along with deficiencies and gaps in the policies. However, due to the deficiency of scientific research about relationships between soil HM concentrations and their ecological or human health effects, the development of SEQSs in China is still greatly restricted. This paper discusses international SEQSs of HMs as well their development in China over time, then examines current Chinese SEQSs to demonstrate their potential regulatory deficiencies by referring to international SEQSs. The corresponding legislative policies are described, and scientific information or responses are outlined for maintaining soil environmental quality. China's experience has shown that policy and science can be linked to work in tandem to better understand and manage soil quality issues.

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A study on soil-environmental quality criteria and standards of arsenic

Cited by 38 publications

References 65 publications

Mapping of genomic regions associated with arsenic toxicity stress in a backcross breeding populations of rice (Oryza sativa L.)

Mapping of genomic regions associated with arsenic toxicity stress in a backcross breeding populations of rice (Oryza sativa L.)

Metal status in soils within a developing education park: Potential risk of land development

Overview on current criteria for heavy metals and its hint for the revision of soil environmental quality standards in China

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