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

doi:10.11924/j.issn.1000-6850.casb2020-0757

Abstract

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

CLC Number:

S637

Mi Baobin, Liu Biqiong, Dai Xiongze, Xiao Wei, Zhang Zhuqing, Zhou Huoqiang, Wang Duanhua. The Accumulation of Five Heavy Metals in Different Genotypes of Brassica juncea[J]. Chinese Agricultural Science Bulletin, 2021, 37(26): 40-49.

Figures/Tables 12

References 34

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品名	类型	编号	品名	类型	编号	品名	类型	编号
五四青丕蓝	根芥	J1	特大棒菜	茎芥	J4	大头菜	榨菜	J7
细叶雪里蕻	叶芥	J2	抗热四季甜竹芥	茎芥	J5	三胞心青菜	叶芥	J8
脆嫩儿菜	茎芥	J3	香港白花柳叶芥兰	叶芥	J6	佳园菊花菜	叶芥	J9

品名	类型	编号	品名	类型	编号	品名	类型	编号
五四青丕蓝	根芥	J1	特大棒菜	茎芥	J4	大头菜	榨菜	J7
细叶雪里蕻	叶芥	J2	抗热四季甜竹芥	茎芥	J5	三胞心青菜	叶芥	J8
脆嫩儿菜	茎芥	J3	香港白花柳叶芥兰	叶芥	J6	佳园菊花菜	叶芥	J9

重金属类型	镉Cd	铅Pb	铬Cr	汞Hg	砷As
测试土壤	3.478	131.7	63.9	0.26	79.0
国标限量(GB 15618—2008)	0.25	50	120	0.20	35

重金属类型	镉Cd	铅Pb	铬Cr	汞Hg	砷As
测试土壤	3.478	131.7	63.9	0.26	79.0
国标限量(GB 15618—2008)	0.25	50	120	0.20	35

组织部位	镉Cd	铅Pb	铬Cr	汞Hg	砷As
芥菜根	0.05	0.10	0.50	0.01	0.50
芥菜茎	0.10	0.10	0.50	0.01	0.50
芥菜叶	0.20	0.30	0.50	0.01	0.50