ABSTRACT Amanita muscaria collected from a forested area in northern Poland in 2015 were analysed for activity concentrations of 137Cs and 40K. Total K concentration values were calculated from 40K data. Mushrooms were grouped in six fruiting bodies size classes regarding to their developmental stage. The 137Cs activity concentrations declined in A. muscaria as the fruiting bodies maturated. The contents of 40K/K activity remained constant in caps at different developmental stage, while for stipes an increase was around twofold (40K from 925 ± 55 Bq kg−1 dry biomass in the baby individuals and 1600 ± 63–1700 ± 53 Bq kg−1 dry biomass in two oldest classes). A. muscaria is a weak accumulator of 137Cs, while a steep drop in activity concentrations of this nuclide in the fruiting bodies as they maturate has not been reported earlier for mushrooms. Clearly, a fate of 137Cs in A. muscaria is highly different from that of 40K/K that is an essential element to fungi. In parallel, an observed increase in the content of 40K/K in stipes of fruiting bodies with developmental state can be related to its ‘hardening’ and more fibrous nature with age and basic function to support the cap, but this has not been studied.

中文翻译：

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苍蝇伞菌子实体放射性铯污染随发育阶段降低

摘要 分析了 2015 年从波兰北部森林地区收集的毒蝇伞的 137C 和 40K 的活性浓度。从 40K 数据计算总钾浓度值。蘑菇根据其发育阶段分为六个子实体大小等级。随着子实体的成熟，毒蕈的 137Cs 活性浓度下降。在不同发育阶段，帽中 40K/K 活性的含量保持不变，而对于叶柄，增加了大约两倍（40K 从 925 ± 55 Bq kg−1 婴儿个体的干生物量和 1600 ± 63–1700 ± 53 Bq kg -1 干生物量在两个最古老的类别）。A. muscaria 是 137Cs 的弱蓄积剂，而早先没有报道过蘑菇的子实体中这种核素的活性浓度随着它们的成熟而急剧下降。显然，毒蕈菌中 137C 的命运与真菌必需元素 40K/K 的命运大不相同。同时，在发育状态的子实体的柄中观察到的 40K/K 含量的增加可能与其“硬化”和随着年龄和支撑菌盖的基本功能的更多纤维性质有关，但这尚未得到研究。