Dynamic equilibrium of radiocesium with stable cesium within the soil–mushroom system in Turkish pine forest

Mushrooms traded as food. Vol II sec. 1

“…However, the value differed between sites, most likely due to different levels of outfall. The correlation between 137 Cs and 133 Cs suggests that mushrooms take up 137 Cs together with stable Cs, but levels of 137 Cs are higher than the level of 133 Cs at the site of the uptake (Karadeniz and Yaprak, 2007). This is in agreement with Yoshida and Muramatsu (1998) and Horyna and Řanda (1988) that hypothesized that the higher uptake of 137 Cs as compared to 133 Cs is due to a different distribution of radioactive and non-radioactive caesium in the environment.…”

Cesium (137Cs and 133Cs), Potassium and Rubidium in Macromycete Fungi and Sphagnum Plants

“…However, this approach is only appropriate for organic soil layers, which contain virtually no or very little clay mineral to which cesium can bind. The isotopic ratios 137 Cs/ 133 Cs in fruit bodies of fungi were similar to those found in organic soil layers of forest soil (Rühm et al, 1997;Karadeniz & Yaprak, 2007 , and are based on sporocarp analysis of different ectomycorrhizal and saprotrophic fungal species. Fungal accumulation of 137 Cs is suggested to be species-dependent, thus, 137 Cs activity concentration and mass concentration of K, Rb and 133 Cs in fungal sporocarps belonging to the mycorrhizal fungus Suillus variegatus were analyzed.…”

“…(Mascanzoni, 2009;Rosén et al, 2011). 282 bioavailable fraction of soils within forest ecosystems is reported Karadeniz & Yaprak (2007) but in cultivated soils, equilibrium between fallout 137 Cs and stable 133 Cs among exchangeable, organic bound and strongly bound fractions has not reached, even though most 137 Cs was deposited on the soils more than 20 years before (Tsukada, 2006). The important roles fungi play in nutrient uptake in forest soils, in particular its role in 137 Cs transfer between soil and fungi, requires better understanding of the mechanisms involved.…”

Activity concentrations of natural radionuclides and 137Cs in soils of coniferous forest sites in West Anatolia

“…A number of sampling sites were recognized as the local wild edible mushrooms areas where elevated radiocesium activities have been previously reported in the fruiting bodies of a number of fungal species (Karadeniz and Yaprak 2007a). It is therefore important to establish the Communicated by R. Matyssek.…”