title: Screening for Cd-Safe Cultivars of Chinese Cabbage and a Preliminary Study on the Mechanisms of Cd Accumulation.
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 pekinensisL.) 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.
authors.affiliation: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China. 2016816157@njau.edu.cn.
authors.forename: Jingjie
authors.initials: J
authors.lastname: Wang
authors.affiliation: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China. 2014816158@njau.edu.cn.
authors.forename: Nan
authors.initials: N
authors.lastname: Yu
authors.affiliation: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China. 2014116044@njau.edu.cn.
authors.forename: Guangmao
authors.initials: G
authors.lastname: Mu
authors.affiliation: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China. kamishin@yahoo.com.
authors.forename: Kamran I
authors.initials: KI
authors.lastname: Shinwari
authors.affiliation: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China. zgshen@njau.edu.cn.
authors.forename: Zhenguo
authors.initials: Z
authors.lastname: Shen
authors.affiliation: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China. zhenglq@njau.edu.cn.
authors.forename: Luqing
authors.initials: L
authors.lastname: Zheng
mesh_terms: D001937:Brassica / Q000737:chemistry / Q000378:metabolism*; D002104:Cadmium / Q000032:analysis / Q000378:metabolism*; D004784:Environmental Monitoring; D004787:Environmental Pollution / Q000032:analysis; D005506:Food Contamination / Q000032:analysis*; D005523:Food Supply; D018527:Hydroponics; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism*; D018517:Plant Roots / Q000737:chemistry; D018520:Plant Shoots / Q000737:chemistry / Q000378:metabolism; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium
keywords: Cd; Chinese cabbage; cultivars screening; gene expression; low-accumulation