title: Direct accumulation pathway of radioactive cesium to fruit-bodies of edible mushroom from contaminated wood logs.
abstract: This paper presents the accumulation process of radioactive Cs in edible mushrooms. We here first report the direct accumulation pathway of radioactive Cs from contaminated wood logs to the fruit-bodies of shiitake mushrooms through the basal portion of the stipe. In this pathway, radioactive Cs is not transported through the hyphae. This pathway results in a high accumulation of radioactive Cs in the fruit-body, more by the excess accumulation of radioactive Cs from the wood logs than that through the hyphae. We grew the fruit-bodies of Shiitake mushroom from radioactive-Cs-contaminated wood logs. The spatial distributions of radioactive Cs and Prussian blue as a tracer of interstitial water in the cross section of the wood log measured after the harvest of the fruit-body from the inoculated sawdust spawn area indicated that some fraction of the radioactive Cs and Prussian blue were transported directly to the basal portion of the stipe during the growth of the fruit-bodies.
authors.affiliation: Advanced Science Research Center, Japan Atomic Energy Agency, 2-4, Shirakata, Tokai-mura, Ibaraki, 319-1195, Japan.
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Ohnuki
authors.affiliation: Fujishukin Co. Ltd. 499-1 Arino Minami, Alps-city, Yamanashi, 400-0226, Japan.
authors.forename: Yukitoshi
authors.initials: Y
authors.lastname: Aiba
authors.affiliation: Advanced Science Research Center, Japan Atomic Energy Agency, 2-4, Shirakata, Tokai-mura, Ibaraki, 319-1195, Japan.
authors.forename: Fuminori
authors.initials: F
authors.lastname: Sakamoto
authors.affiliation: Advanced Science Research Center, Japan Atomic Energy Agency, 2-4, Shirakata, Tokai-mura, Ibaraki, 319-1195, Japan.
authors.forename: Naofumi
authors.initials: N
authors.lastname: Kozai
authors.affiliation: Fukushima Environmental Safety Center, Section of Fukushima Research and Development, Japan Atomic Energy Agency, 10-2 Fukasaku, Miharu-machi, Fukushima 963-7700, Japan.
authors.forename: Tadafumi
authors.initials: T
authors.lastname: Niizato
authors.affiliation: Fukushima Environmental Safety Center, Section of Fukushima Research and Development, Japan Atomic Energy Agency, 10-2 Fukasaku, Miharu-machi, Fukushima 963-7700, Japan.
authors.forename: Yoshito
authors.initials: Y
authors.lastname: Sasaki
mesh_terms: D002588:Cesium Radioisotopes; D062406:Fukushima Nuclear Accident; D025301:Hyphae / Q000737:chemistry / Q000528:radiation effects*; D020942:Shiitake Mushrooms / Q000737:chemistry / Q000254:growth & development / Q000528:radiation effects*; D014934:Wood / Q000528:radiation effects*
chemical_list: D002588:Cesium Radioisotopes