Screening for Cd-Safe Cultivars of Chinese Cabbage and a Preliminary Study on the Mechanisms of Cd Accumulation

Jingjie Wang, Nan Yu, Guangmao Mu, Kamran I. Shinwari, Zhenguo Shen and Luqing Zheng
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Jingjie Wang: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
Nan Yu: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
Guangmao Mu: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
Kamran I. Shinwari: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
Zhenguo Shen: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
Luqing Zheng: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China

IJERPH, 2017, vol. 14, issue 4, 1-10

Abstract: With the rapid progress of industrialization, the effects of environmental contamination on plant toxicity, and subsequently on human health, is a growing concern. For example, the heavy metal pollution of soil such as that caused by cadmium (Cd) is a serious threat. Therefore, screening for pollution-safe edible plants is an essential approach for growing plants under heavy metal-contaminated soils. In the current study, 35 Chinese cabbage ( Brassica pekinensis L.) cultivars were selected with the aim of screening for Cd-safe cultivars (CSCs), analyzing their safety, and exploring the mechanism of Cd accumulation. Our field-culture experiments revealed that the Cd content in the edible parts of the cultivars were varied and were determined to possibly be CSCs. Hydroponics experiments were used to simulate six different degrees of soil contamination (high and low Cd concentrations) on possible CSCs. The results indicated a significant difference ( p < 0.05) in Cd concentration in the cultivars, and verified the safety of these possible CSCs. The analyses of the transport coefficient and expression levels showed that the differences in Cd accumulation among the Chinese cabbage cultivars were related to the expression of genes involved in absorption and transport rather than a root-to-shoot translocation limitation.

Keywords: Chinese cabbage; Cd; cultivars screening; low-accumulation; gene expression (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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