TY - JOUR
T1 - Effects of environment and genotype on mercury and methylmercury accumulation in rice (Oryza sativa L.)
AU - Huang, Lu
AU - Li, Bing
AU - Tam, Nora Fung Yee
AU - Wang, Xun
AU - Ye, Zhihong
N1 - Publisher Copyright:
© 2018, Springer International Publishing AG, part of Springer Nature.
PY - 2018/6/1
Y1 - 2018/6/1
N2 - Background and aims: Rice 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. Methods: A 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. Results: THg 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: THg accumulation in brown rice was mainly affected by both genotype and environment, whereas MeHg accumulation was largely determined by environment.
AB - Background and aims: Rice 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. Methods: A 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. Results: THg 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: THg accumulation in brown rice was mainly affected by both genotype and environment, whereas MeHg accumulation was largely determined by environment.
KW - Additive Main Effects and Multiplicative Interaction (AMMI)
KW - Edaphic Factor
KW - Genotype
KW - Mercury
KW - Methylmercury
UR - http://www.scopus.com/inward/record.url?scp=85045419846&partnerID=8YFLogxK
U2 - 10.1007/s11104-018-3651-4
DO - 10.1007/s11104-018-3651-4
M3 - Article
AN - SCOPUS:85045419846
SN - 0032-079X
VL - 427
SP - 269
EP - 280
JO - Plant and Soil
JF - Plant and Soil
IS - 1-2
ER -