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Int. J. Environ. Res. Public Health 2017, 14(4), 395; doi:10.3390/ijerph14040395

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

College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
These authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Academic Editor: Susanne Charlesworth
Received: 16 February 2017 / Revised: 22 March 2017 / Accepted: 29 March 2017 / Published: 7 April 2017
(This article belongs to the Special Issue Heavy Metals: Environmental and Human Health)
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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. View Full-Text
Keywords: Chinese cabbage; Cd; cultivars screening; low-accumulation; gene expression Chinese cabbage; Cd; cultivars screening; low-accumulation; gene expression
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Wang, J.; Yu, N.; Mu, G.; Shinwari, K.I.; Shen, Z.; Zheng, L. Screening for Cd-Safe Cultivars of Chinese Cabbage and a Preliminary Study on the Mechanisms of Cd Accumulation. Int. J. Environ. Res. Public Health 2017, 14, 395.

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