Knockdown of BTS may provide a new strategy to improve cadmium-phytoremediation efficiency by improving iron status in plants.
Knockdown of BTS may provide a new strategy to improve cadmium-phytoremediation efficiency by improving iron status in plants.
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DOI：
10.1016/j.jhazmat.2019.121473
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发表时间：
2020-02
影响因子：
13.6
通讯作者：
Y. Zhu;W. Du;X. Fang;L. Zhang;C. Jin
中科院分区：
文献类型：
--
作者：
Y. Zhu;W. Du;X. Fang;L. Zhang;C. Jin
The identification of the key genes related to cadmium (Cd) tolerance and accumulation is a major element in genetically engineering improved plants for Cd phytoremediation. Owing to the similarity between the ionic hydrated radius of Cd2+and Fe2+, this study investigated how the Cd tolerance and accumulation ofArabidopsisplants was affected by the knockdown ofBTS, a gene that negatively regulates Fe nutrition. After exposure to 40 μM Cd, theBTS-knockdown mutant,bts-1, exhibited greater Fe nutrition and better growth than wild-type plants. In addition, the Cd concentration in both roots and shoots was approximately 50% higher in thebts-1mutant than in wild-type plants. Consequently, thebts-1mutant accumulated approximately 100% and 150% more Cd in the roots and shoots, respectively, than wild-type plants. Further study showed that Fe removal from the growth medium and inhibition of the Fe transporter gene,IRT1, removed the differences observed in the growth and Cd concentration of thebts-1and wild-type plants, respectively. These results demonstrated thatBTSknockdown improved Cd tolerance and accumulation in plants by improving Fe nutrition; thus, the knockdown ofBTSvia biotechnological pathways may represent a valuable strategy for the improvement in the efficiency of Cd phytoremediation.
