Smith B L, Seawright A A, Ng J C, Hertle A T, Thomson J A, Bostock P D
New Zealand Pastoral Agriculture Research Institute, Ruakura Agriculture Research Centre, Hamilton.
Nat Toxins. 1994;2(6):347-53.
Two surveys of bracken fern for the concentration of the carcinogen ptaquiloside (PT) have been carried out, one of bracken fern from the eastern side of Australia and the other from a worldwide collection of bracken clones held in Sydney Australia. Bracken from eastern Australia contained concentrations of ptaquiloside ranging from 0 to 12,945 micrograms PT/g. From 91 samples 15% contained greater than 5,000 micrograms PT/g and 57% of samples contained more than 1,000 micrograms PT/g bracken on the dry weight basis. Ptaquiloside concentrations were highest in Pteridium revolutum and from P. esculentum from areas where bovine enzootic haematuria was known to occur. Bracken from the cultivated bracken clone collection from world-wide sources tended to have lower concentrations of ptaquiloside ranging from 0 to 9,776 micrograms PT/g. From 77 samples, 8% contained more than 5,000 micrograms PT/g and 35% contained more than 1,000 micrograms PT/g bracken. Samples from both the eastern Australia survey and the Australian representatives in the worldwide collection showed significantly higher concentrations of PT in the P. esculentum collected from the more southern states. In samples from the worldwide collection there were no statistical differences in the concentrations of PT in bracken between taxa.
针对致癌物质ptaquiloside（PT）的含量，已对蕨菜进行了两项调查，一项针对澳大利亚东部的蕨菜，另一项针对保存在澳大利亚悉尼的来自世界各地的蕨菜克隆样本。澳大利亚东部的蕨菜中ptaquiloside的含量范围为0至12,945微克PT/克。在91个样本中，15%的样本PT含量大于5,000微克/克，57%的样本蕨菜干重基础上PT含量超过1,000微克/克。在已知发生牛地方性血尿的地区，倒地蕨和食用蕨中的ptaquiloside浓度最高。来自世界各地的栽培蕨菜克隆样本中的蕨菜，其ptaquiloside含量往往较低，范围为0至9,776微克PT/克。在77个样本中，8%的样本蕨菜PT含量超过5,000微克/克，35%的样本蕨菜PT含量超过1,000微克/克。澳大利亚东部调查的样本以及全球样本中澳大利亚代表样本均显示，从较南部各州采集的食用蕨中PT浓度显著更高。在全球样本中，不同类群的蕨菜中PT浓度无统计学差异。
