Effects of environment and genotype on mercury and methylmercury accumulation in rice (Oryza sativa L.)
Effects of environment and genotype on mercury and methylmercury accumulation in rice (Oryza sativa L.)
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环境和基因型对水稻汞和甲基汞积累的影响（Oryza sativa L.）
DOI：
10.1007/s11104-018-3651-4
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发表时间：
2018-04
期刊：
影响因子：
4.9
通讯作者：
Ye Zhihong
中科院分区：
文献类型：
--
作者：
Huang Lu;Li Bing;Tam Nora Fung-Yee;Wang Xun;Ye Zhihong
背景与目的受汞（Hg）和甲基汞（MeHg）污染的稻米对人体健康构成威胁。本研究评价了基因型、环境和基因型-环境互作对糙米中总汞（THg）和甲基汞积累的相对重要性。基因型，环境和基因型-环境互作对糙米THg和甲基汞积累的影响进行了评估的加性主效应和乘法互作（AMMI）model.ResultsTHg和甲基汞在糙米中的浓度范围为20.5至75.5 μg kg-1和2.24至54.7 μg kg-1，分别。AMMI模型表明，基因型对糙米总汞和甲基汞含量变异的解释率分别为41.1%和19.6%，环境对总汞和甲基汞含量变异的解释率分别为40.6%和55.8%，基因型-环境互作对总汞和甲基汞含量变异的解释率分别为11.9%和20.0%。糙米总汞与土壤水溶性汞、全钾呈显著正相关，与土壤全硫、全铁、全有机碳、全镍呈显著负相关。糙米甲基汞与土壤pH值和硒呈负相关。
Background and aimsRice grains contaminated by mercury (Hg) and methylmercury (MeHg) pose risks to human health. This study evaluated the relative importance of genotype, environment and genotype-environment interactions on the accumulation of total Hg (THg) and MeHg in brown rice.MethodsA pot trial with four rice genotypes and 10 Hg-contaminated paddy soils was conducted under greenhouse conditions. The effects of genotype, environment and genotype-environment interactions on brown rice THg and MeHg accumulation were assessed by an Additive Main Effects and Multiplicative Interaction (AMMI) model.ResultsTHg and MeHg concentrations in brown rice ranged from 20.5 to 75.5 μg kg−1 and 2.24 to 54.7 μg kg−1, respectively. The AMMI model indicated that genotype explained 41.1 and 19.6%, environment described 40.6 and 55.8%, and the genotype-environment interaction explained 11.9 and 20.0% of the variation in brown rice THg and MeHg levels, respectively. Brown rice THg positively correlated with water-soluble Hg and total potassium, but negatively correlated with total sulphur, iron, total organic carbon and nickel in soils. Brown rice MeHg negatively correlated with soil pH and selenium.Conclusion
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