Bioaccumulation and translocation of cadmium in cole (Brassica campestris L.)and celery (Apium graveolens) grown in the polluted oasis soil,Northwest of China
Yiming Yang , Zhongren Nan , Zhuanjun Zhao , Zhaowei Wang , Shengli Wang , Xia Wang , Wangqiang Jin , Cuicui Zhao
DOI:
Received October 09, 2010,Revised February 18, 2011, Accepted , Available online
Volume 23,2011,Pages 1368-1374
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A pot experiment was conducted to study the bioaccumulation and translocation of cadmium (Cd) in cole (Brassica campestris L.)
and celery (Apium graveolens) grown in the Cd-polluted oasis soil, Northwest of China. The results showed that Cd in the unpolluted
oasis soil was mainly bound to carbonate fraction (F2) and Fe-Mn oxide fraction (F3). However, marked change of Cd fractions was
observed with increasing soil Cd concentrations, in which the concentration of Cd in F1 (exchangeable fraction), F2 and F3 increased
significantly (p < 0.001 for F1, F2 and F3). The growth of cole and celery could be facilitated by low concentrations of Cd, but inhibited
by high concentrations. The correlation analysis between the fraction distribution coefficient of Cd in the soil and Cd concentration
accumulated in the two vegetables showed that Cd in F1 in the soil made the greatest contribution on the accumulation of Cd in the
two vegetables. The high bio-concentration factor and the translocation factor of Cd in both cole and celery were observed, and Cd
had higher accumulation in the edible parts of the two vegetables. Therefore, both cole and celery grown in Cd-polluted oasis soil
have higher risk to human health. And the two vegetables are not suitable to be cultivated as vegetables consumed by human in the
Cd-polluted oasis soil.
