Coupling effects of Fe(II) and CaCO3 application on cadmium uptake and accumulation in rice (Oryza sativa L.)

Authors

  • Bo Xu College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China https://orcid.org/0000-0001-6087-2677
  • Jianyu Chen College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China
  • Bingjie Qian College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China
  • Duoduo Jiao College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China
  • Yanlin You College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China
  • Xiaodong Guo College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China
  • Yuanbiao Hu College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China
  • Dingxing Wang College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China https://orcid.org/0009-0004-5137-5897
  • Liwen Huang College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China
  • Xinlei Wang
  • Peng Wei College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China
  • Lirong Zhang College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China
  • Liehong Wu College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China
  • Jinghuang Huang College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China
  • Yanhui Chen Jinjiang Association of Agricultural Science Societies, China
  • Guo Wang College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, China

DOI:

https://doi.org/10.5073/JABFQ.2024.097.008

Abstract

Excessive cadmium (Cd) in rice, caused by Cd pollution of farmlands, poses a serious threat to human health. In this study, a pot experiment was conducted to investigate the effects of two doses of CaCO3 (Ca1: 2 g kg-1, Ca2: 10g kg-1), two types of Fe(II) (EDTA-Fe(II) and FeSO4; 0.14 g Fe kg-1), and their combined application on the uptake and accumulation of Cd in rice plants grown in Cd-contaminated acidic soil. The results revealed that FeSO4 significantly increased rice grain biomass, whereas the other treatments had no significant effects. Further, the addition of EDTA-Fe(II) or FeSO4 significantly enhanced iron plaque formation on the root surface and increased the Fe content in the rice plants and porewater. Compared to the control, CaCO3 addition weakened the formation of iron plaque and reduced the Fe concentration in the porewater and root tissue, stems and leaves, whereas the Fe concentration in brown rice and the husks remained unaffected. Combined application of CaCO3 and Fe(II) significantly promoted the formation of iron plaque and increased the Fe concentration in brown rice. However, the Cd concentration in the iron plaque was reduced by CaCO3 addition but increased by Fe(II) treatment. Notably, all treatments reduced the Cd concentration in all rice plant tissues. The application of Ca1, Ca2, EDTA-Fe(II), FeSO4, Ca1+EDTA-Fe(II), Ca1+FeSO4, Ca2+EDTA-Fe(II) and Ca2+FeSO4 significantly reduced the Cd concentration in brown rice by 69%, 63%, 51%, 60%, 46%, 39%, 38%, and 29%, respectively. These results indicate that the application of CaCO3, EDTA-Fe(II)/FeSO4, or their combination can effectively reduce Cd accumulation and translocation in rice plants.

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Published

2024-04-29

Issue

Vol. 97 (2024): Journal of Applied Botany and Food Quality

Section

Plant food chemistry

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Copyright (c) 2024 The Author(s)

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