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Effects of Mn2+ on Cd accumulation and ionome in rice and spinach
Wang, Meie; Ma, Wankai; Chaney, Rufus L.; Green, Carrie E.; Chen, Weiping
AbstractHealth risks caused by food containing Cd is a concern worldwide. Interaction between Mn and Cd has been widely studied in normal hydroponic solution with high ion activities (e.g., the study on sharing of transporter Natural Resistance-Associated Macrophage Protein 5 between Mn and Cd in rice [Oryza sativa L.]). However, interaction of Mn and Cd in crops like rice and spinach (Spinacia oleracea L.) at field ion activity level is still unknown. Thus, an ethyleneglycoltetraacetate-buffered solution experiment was conducted to explore the effect of Mn on the uptake and accumulation of Cd and other mineral elements in rice and spinach. In rice, antagonism of Mn and Cd was only observed in roots at deficient and toxic levels of external Mn2+. Compared with those at Mn2+ sufficiency (pMn(2+) 6.7-5.3), average root Cd levels were elevated significantly by 1.85-3.05 times at Mn2+ deficiency (pMn(2+) 8.2) but decreased by 1.57-2.59 times at Mn2+ toxicity (pMn(2+) 4.8). The antagonism between Mn and K/Mg in rice shoots might be caused by their common role in physiological processes in plants. Antagonism of Mn/Ni in spinach in this work was consistent with their shared transporters in dicots. Results about the antagonism of root Cd/Mn at Mn2+ deficiency suggest that sufficiently available Mn2+ is significant to reduce Cd uptake in rice under field levels of ion activity, but it was not for spinach because the change of tissue Cd was insignificant with the increase of Mn2+ activity from deficiency to toxicity.
Department城市与区域生态国家重点实验室 ; 城市与区域生态国家重点实验室
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
2.USDA ARS, Crop Syst & Global Change Lab, Beltsville, MD 20705 USA
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Meie,Ma, Wankai,Chaney, Rufus L.,et al. Effects of Mn2+ on Cd accumulation and ionome in rice and spinach[J]. JOURNAL OF ENVIRONMENTAL QUALITY,2022,51(5):890-898.
APA Wang, Meie,Ma, Wankai,Chaney, Rufus L.,Green, Carrie E.,&Chen, Weiping.(2022).Effects of Mn2+ on Cd accumulation and ionome in rice and spinach.JOURNAL OF ENVIRONMENTAL QUALITY,51(5),890-898.
MLA Wang, Meie,et al."Effects of Mn2+ on Cd accumulation and ionome in rice and spinach".JOURNAL OF ENVIRONMENTAL QUALITY 51.5(2022):890-898.
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