title: Transfer of radiocesium from rhizosphere soil to four cruciferous vegetables in association with a Bacillus pumilus strain and root exudation.
abstract: This study was carried out to assess the effect of Bacillus pumilus on the roots of four cruciferous vegetables with different root structures in regard to enhancement of137Cs bioavailability in contaminated rhizosphere soil. Results revealed that B. pumilus inoculation did not enhance the plant biomass of vegetables, although it increased root volume and root surface areas of all vegetables except turnip. The pH changes due to rhizosphere acidification by B. pumilus inoculation and root exudation did not affect the bioavailability of137Cs. However, concentrations of137Cs in plant tissues and soil-to-plant transfer values increased as a result of the larger root volume and root surface area of vegetables due to inoculation. Moreover, leafy vegetables, which possessed larger root volume and root surface areas, had a higher137Cs transfer value than root vegetables.
authors: United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan.
authors: Han Phyo
authors: HP
authors: Aung
authors: Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan.
authors: Akwasi Dwira
authors: AD
authors: Mensah
authors: Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan.
authors: Yi Swe
authors: YS
authors: Aye
authors: Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan.
authors: Salem
authors: S
authors: Djedidi
authors: Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan.
authors: Yosei
authors: Y
authors: Oikawa
authors: Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan.
authors: Tadashi
authors: T
authors: Yokoyama
authors: Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan.
authors: Sohzoh
authors: S
authors: Suzuki
authors: Leibniz Centre for Agricultural Landscape Research, Institute of Land Use Systems, Eberswalder Str. 84, 15374 Muencheberg, Germany. Electronic address: belks@zalf.de.
authors: Sonoko
authors: S
authors: Dorothea Bellingrath-Kimura
mesh_terms: D000069979:Bacillus pumilus; D002588:Cesium Radioisotopes / Q000032:analysis*; D058441:Rhizosphere; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D014675:Vegetables / Q000737:chemistry* / Q000382:microbiology
chemical_list: D002588:Cesium Radioisotopes; D012987:Soil; D012990:Soil Pollutants, Radioactive
keywords: (137)Cs transfer; Cruciferous vegetables; Low molecular weight organic acids; Plant growth promoting rhizobacteria; Root volume