Insights into the Effect of a Natural Arsenate Dose on Growth,Nodulation and Redox Metabol

Insights into the Effect of a Natural Arsenate Dose on Growth,Nodulation and Redox Metabolism of

Soybean Plants

Dear Editor,

【期刊名称】土壤圈（英文版） 【年(卷),期】2019(029)004 【总页数】7

Arsenic (As) is a harmful metalloid that occurs in soil and water; its concentration varies considerably among geographic regions, with groundwater

being

the

principal

source

of

human

contamination(Smedley and Kinniburgh, 2002). Besides the direct contamination effect of drinking water that contains high As concentration, human poisoning may also occur after ingestion of contaminated food. Soybean (Glycine max) is a globally important crop due to its nutritional characteristics, with Argentina being one of the major producers. The soybean plant can symbiotically associate with Bradyrhizobium soil bacteria and form root nodules to convert atmospheric nitrogen(N)to ammonia for fixation; this constitutes an economic and ecologically sustainable alternative to artificial N fertilizers(Wang et al., 2001). In some areas of C′ordoba, Argentine, the groundwater As concentrations reach up to 24 μmol L?1 (Cabrera et al., 2005) and substantially exceed the legal maximum for drinking