Pei Donghui, Xie Han, Song Haihai, Xu Heng, Wu Yumeng
Key Laboratory of Bioresources and Ecoenvironment, Ministry of Education, College of Life Science, Sichuan University, Chengdu, Sichuan 610064, People's Republic of China.
J Food Prot. 2015 Feb;78(2):390-5. doi: 10.4315/0362-028X.JFP-14-336.
Lentinus edodes is one of the most popular edible mushrooms in the market. However, it contains heavy metals that are poisonous to humans even at trace concentrations. The concentrations and bioconcentration factors of five heavy metals in cultivated L. edodes in Chengdu were studied, and the potential health risks to local residents associated with the cultivated L. edodes consumption were evaluated. Total concentrations of cadmium (Cd), lead (Pb), chromium (Cr), arsenic (As), and mercury were determined in the fruiting bodies and the substrate from three agricultural areas. Fruiting bodies samples were collected at different growing times (2, 4, 6, and 8 days). The bioconcentration factors of heavy metals from the substrate to the fruiting bodies were estimated, and the potential health risks of local L. edodes were assessed. Because antioxidant enzymes can resist the creation of reactive oxygen species and defend against heavy metals, the activities of three antioxidant enzymes (superoxide dismutase, catalase, and peroxidase) in the fruiting bodies were also determined. A gradual change in heavy metal concentrations occurred across the growing time of the fruiting bodies. Cd transferred from the substrate to the fruiting bodies in larger concentrations than did Pb, Cr, and As. However, Chengdu residents were not exposed to significant health risks associated with consumption of local L. edodes. Nevertheless, more attention should be focused on children because of their higher sensitivity to metal pollutants.
香菇是市场上最受欢迎的食用蘑菇之一。然而，它含有重金属，即使是痕量浓度也对人体有毒。研究了成都栽培香菇中五种重金属的浓度和生物富集系数，并评估了食用当地栽培香菇对当地居民的潜在健康风险。测定了三个农业地区子实体和基质中镉（Cd）、铅（Pb）、铬（Cr）、砷（As）和汞的总浓度。在不同生长时间（2、4、6和8天）采集子实体样本。估算了重金属从基质到子实体的生物富集系数，并评估了当地香菇的潜在健康风险。由于抗氧化酶可以抵抗活性氧的产生并抵御重金属，因此还测定了子实体中三种抗氧化酶（超氧化物歧化酶、过氧化氢酶和过氧化物酶）的活性。在子实体的整个生长过程中，重金属浓度发生了逐渐变化。与铅、铬和砷相比，镉从基质转移到子实体中的浓度更高。然而，成都居民食用当地香菇不会面临重大健康风险。尽管如此，由于儿童对金属污染物更为敏感，应给予更多关注。
