title: Arsenic limits trace mineral nutrition (selenium, zinc, and nickel) in Bangladesh rice grain.
abstract: A reconnaissance of 23 paddy fields, from three Bangladesh districts, encompassing a total of 230 soil and rice plant samples was conducted to identify the extent to which trace element characteristics in soils and irrigation waters are reflected by the harvested rice crop. Field sites were located on two soil physiographic units with distinctly different As soil baseline and groundwater concentrations. For arsenic (As), both straw and grain trends closely fitted patterns observed for the soils and water. Grain concentration characteristics for selenium (Se), zinc (Zn), and nickel (Ni), however, were markedly different. Regressions of shoot and grain As against grain Se, Zn, and Ni were highly significant (P < 0.001), exhibiting a pronounced decline in grain trace-nutrient quality with increasing As content. To validate this further, a pot experiment cultivar screening trial, involving commonly cultivated high yielding variety (HYV) rice grown alongside two U.S. rice varieties characterized as being As tolerant and susceptible, was conducted on an As-amended uniform soil. Findings from the trial confirmed that As perturbed grain metal(loid) balances, resulting in severe yield reductions in addition to constraining the levels of Se, Zn, and Ni in the grain.
authors.affiliation: Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
authors.forename: Paul N
authors.initials: PN
authors.lastname: Williams
authors.forename: Shofiqul
authors.initials: S
authors.lastname: Islam
authors.forename: Rafiqul
authors.initials: R
authors.lastname: Islam
authors.forename: M
authors.initials: M
authors.lastname: Jahiruddin
authors.forename: Eureka
authors.initials: E
authors.lastname: Adomako
authors.forename: A R M
authors.initials: AR
authors.lastname: Soliaman
authors.forename: G K M M
authors.initials: GK
authors.lastname: Rahman
authors.forename: Ying
authors.initials: Y
authors.lastname: Lu
authors.forename: Claire
authors.initials: C
authors.lastname: Deacon
authors.forename: Yong-Guan
authors.initials: YG
authors.lastname: Zhu
authors.forename: Andrew A
authors.initials: AA
authors.lastname: Meharg
mesh_terms: D001151:Arsenic / Q000378:metabolism*; D001459:Bangladesh; D009532:Nickel / Q000378:metabolism; D009747:Nutritional Physiological Phenomena; D012275:Oryza / Q000254:growth & development / Q000378:metabolism*; D018520:Plant Shoots / Q000378:metabolism; D012639:Seeds / Q000378:metabolism*; D012643:Selenium / Q000378:metabolism; D014131:Trace Elements / Q000378:metabolism*; D015032:Zinc / Q000378:metabolism
chemical_list: D014131:Trace Elements; D009532:Nickel; D012643:Selenium; D015032:Zinc; D001151:Arsenic