Absorption and translocation of cesium through Konara oak (Quercus serrata) bark. Issue 1 (2nd January 2018)

• Record Type: Journal Article
• Authors: Wang, Wei; Takenaka, Chisato; Tomioka, Rie; Kanasashi, Tsutomu
• Is Part Of: Journal of forest research. Volume 23:Issue 1(2018)
• Page Start: 35
• Page End: 40
• Publication Date: 2018-01-02
• Subjects: Absorption -- bark -- cesium -- radiocesium -- Quercus serrata; Forests and forestry -- Periodicals; Forests and forestry -- Japan -- Periodicals; 634.905
• DOI: 10.1080/13416979.2018.1426898
• Languages: English
• ISSNs: 1341-6979

Abstract

ABSTRACT: Bark–wood translocation has been suggested as an important route for the contamination of trees via radiocesium in the initial stage of deposition. In this study, we investigated the cesium absorption through bark of mature Konara oak ( Quercus serrata ). Stable Cs ( 133 Cs) was applied onto the bark at 1.2 m, and then after 8 weeks, the 133 Cs concentration was determined in the outer bark, inner bark, sapwood, and heartwood of stem disks at several heights, as well as in the current-year leaves and branches from the tree tops. At the height of 1.2 m, the 133 Cs concentration was significant higher in the sapwood of the treated trees than in those of the control trees. However, no difference was found in the 133 Cs concentration in the heartwood of the treated and control trees not only in the wood above and below 1.2 m but also at 1.2 m. There was no significant difference in the 133 Cs concentration of the current-year leaves and branches of the treated and control trees. Our results suggest that Cs absorption through bark may occur even in the dormant period of tree and the absorption is probably independent of cambial activities.