Arsenic accumulation and phosphorus status in two rice (Oryza sativa L.) cultivars surveyed from fields in South China.
The consumption of paddy rice (Oryza sativa L.) is a major inorganic arsenic exposure pathway in S.E. Asia. A multi-location survey was undertaken in Guangdong Province, South China to assess arsenic accumulation and speciation in 2 rice cultivars, one an Indica and the other a hybrid Indica. The results showed that arsenic concentrations in rice tissue increased in the order grain < husk < straw < root. Rice grain arsenic content of 2 rice cultivars was significant different and correlated with phosphorus concentration and molar ratio of P/As in shoot, being higher for the Indica cultivar than for the hybrid Indica, which suggests altering shoot phosphorus status as a promising route for breeding rice cultivars with reduced grain arsenic. Speciation of grain arsenic, performed using HPLC-ICP-MS, identified inorganic arsenic as the dominant arsenic species present in the rice grain.
Lu
Ying
Y
College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.
Dong
Fei
F
Deacon
Claire
C
Chen
Huo-Jun
HJ
Raab
Andrea
A
Meharg
Andrew A
AA
D001151:Arsenic / Q000032:analysis / Q000378:metabolism*; D002681:China; D003257:Consumer Product Safety; D005506:Food Contamination / Q000032:analysis*; D012275:Oryza / Q000737:chemistry* / Q000378:metabolism*; D010758:Phosphorus / Q000032:analysis / Q000378:metabolism*; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism
D012989:Soil Pollutants; D010758:Phosphorus; D001151:Arsenic