The Effect of Pollination on Cd Phytoextraction From Soil by Maize (Zea mays L.)

Wending XuSchool of Environment and Energy, South China University of Technology, Guangzhou, PR China

Guining LuSchool of Environment and Energy, South China University of Technology, Guangzhou, PR China;The Ministry of Education Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, South China University of Technology, Guangzhou, PR ChinaCorrespondence[email protected]

Rui WangSchool of Environment and Energy, South China University of Technology, Guangzhou, PR China

Chuling GuoSchool of Environment and Energy, South China University of Technology, Guangzhou, PR China;The Ministry of Education Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, South China University of Technology, Guangzhou, PR China

Changjun LiaoSchool of Environment and Energy, South China University of Technology, Guangzhou, PR China

Xiaoyun YiSchool of Environment and Energy, South China University of Technology, Guangzhou, PR China

Zhi DangSchool of Environment and Energy, South China University of Technology, Guangzhou, PR China;State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, PR ChinaCorrespondence[email protected]

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Abstract

A pot experiment was conducted to investigate the effects of pollination on cadmium (Cd) phytoextraction from soil by mature maize plants. The results showed that the unpollinated maize plants accumulated 50% more Cd than that of the pollinated plants, even though the dry weight of the former plants was 15% less than that of the latter plants. The Cd accumulation in root and leaf of the unpollinated maize plant was 0.47 and 0.89 times higher than that of the pollinated plant, respectively. The Cd concentration in the cob was significantly decreased because of pollination. Preventing pollination is a promising approach for enhancing the effectiveness of phytoextraction in Cd-contaminated soils by maize. This study suggested that in low Cd-contaminated soil pollination should be encouraged because accumulation of Cd in maize grains is very little and maize seeds can bring farmers economic benefits, while in high Cd-contaminated soil, inhibition of pollination can be applied to enhance phytoextraction of Cd from soil by maize plant.

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The Effect of Pollination on Cd Phytoextraction From Soil by Maize (Zea mays L.)

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The Effect of Pollination on Cd Phytoextraction From Soil by Maize (Zea mays L.)

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