Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (26): 40-49.doi: 10.11924/j.issn.1000-6850.casb2020-0757

Special Issue: 生物技术 土壤重金属污染

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The Accumulation of Five Heavy Metals in Different Genotypes of Brassica juncea

Mi Baobin1(), Liu Biqiong2, Dai Xiongze1, Xiao Wei1, Zhang Zhuqing1, Zhou Huoqiang1(), Wang Duanhua1()   

  1. 1Research Institute of Vegetables, Hunan Academy of Agricultural Sciences, Changsha 410125
    2Graduate School, Hunan Agricultural University, Changsha 410128
  • Received:2020-12-07 Revised:2021-03-05 Online:2021-09-15 Published:2021-09-30
  • Contact: Zhou Huoqiang,Wang Duanhua E-mail:mibaobin@hunaas.cn;zhouhuoqiang@hunaas.cn;wangduanhua@vip.qq.com

Abstract:

The study aims to investigate the accumulation difference of five heavy metals: cadmium (Cd), arsenic (As), lead (Pb), mercury (Hg) and chromium (Cr) in different genotypes of brassica juncea, and to provide guidance on the production safety of brassica juncea in areas with complex contamination of heavy metals. Combining the heavy metal biological concentration factor and transfer factor with the single-factor contamination index method, as well as the Nemero integrated contamination method, the responses of nine different genotypes of brassica juncea to the five heavy metals were investigated in pot experiments to comprehensively evaluate the production safety of brassica juncea in heavy metal contaminated areas. The results show that Brassica juncea has strong ability to transfer heavy metals from stem to leaf, and heavy metals are mainly accumulated in the roots and leaves of brassica juncea. The individual contamination index of heavy metal Cd in different parts of brassica juncea is generally high and has large varietal difference. The contamination indexes between Pb, As, Hg and Cr show similar trend, and the differences between species and parts are not obvious. Among the varieties tested, ‘Wusiqingpeilan’, ‘Cuinengercai’, ‘Tedabangcai’ and ‘Kangresijitianzhujie’ are better brassica juncea varieties with ower heavy metal accumulation capacity. The accumulation of heavy metal in brassica juncea is related to genotype and heavy metal species, and it is feasible to select brassica juncea varieties with low accumulation of heavy metals which can be used for planting in heavy metal contaminated fields.

Key words: Brassica juncea, heavy metal, genotype, cumulative difference, biological concentration factor, transfer factor, safety assessment

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