Youngia erythrocarpa, a newly discovered cadmium hyperaccumulator plant

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• 作者：Lijin Lin (1)
  Bo Ning (2)
  Ming’an Liao (1)
  Yajun Ren (1)
  Zhihui Wang (1)
  Yingjie Liu (2)
  Ji Cheng (1)
  Li Luo (1)
  
• 关键词：Youngia erythrocarpa ; Cadmium ; Resistance ; Bioconcentration ; Hyperaccumulator ; Translocation
• 刊名：Environmental Monitoring and Assessment
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：187
• 期：1
• 全文大小：183 KB
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• 作者单位：Lijin Lin (1)
  Bo Ning (2)
  Ming’an Liao (1)
  Yajun Ren (1)
  Zhihui Wang (1)
  Yingjie Liu (2)
  Ji Cheng (1)
  Li Luo (1)
  
  1. College of Horticulture, Sichuan Agricultural University, Ya’an, Sichuan, 625014, China
  2. College of Resource and Environment, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
  
• ISSN：1573-2959

文摘

The farmland weed Youngia erythrocarpa has been found to have the basic characteristics of a cadmium (Cd) hyperaccumulator. This study carried out preliminary and further Cd concentration gradient experiments and field experiment using Y. erythrocarpa to confirm this fact. The results showed that the biomass and resistance coefficient of Y. erythrocarpa decreased, but the root/shoot ratio and the Cd content in roots and shoots increased with the increase in soil Cd concentration. The Cd content in shoots of Y. erythrocarpa exceeded 100?mg/kg when the soil Cd concentration was 25?mg/kg in the two concentration gradient experiments, up to the maxima of 293.25 and 317.87?mg/kg at 100?mg/kg soil Cd. Both the bioconcentration factor of the shoots and the translocation factor exceeded 1 in all Cd treatments. In the field experiment, the total Cd extraction by shoots was 0.934-.996?mg/m2 at soil Cd levels of 2.04-.89?mg/kg. Therefore, Y. erythrocarpa is a Cd hyperaccumulator that could be used to remediate Cd-contaminated farmland soil efficiently.