Genotypic difference in (137)Cs accumulation and transfer from the contaminated field in Fukushima to azuki bean (Vigna angularis).
The screening of mini-core collection of azuki bean accessions (Vigna angularis (Willd.) Ohwi & Ohashi) for comparative uptake of (137)Cs in their edible portions was done in field trials on land contaminated by the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. Ninety seven azuki bean accessions including their wild relatives from a Japanese gene bank, were grown in a field in the Fukushima prefecture, which is located approximately 51 km north of FDNPP. The contamination level of the soil was 3665 ± 480 Bq kg(-1) dry weight ((137)Cs, average ± SD). The soil type comprised clay loam, where the sand: silt: clay proportion was 42:21:37. There was a significant varietal difference in the biomass production, radiocaesium accumulation and transfer factor (TF) of radiocaesium from the soil to edible portion. Under identical agricultural practice, the extent of (137)Cs accumulation by seeds differed between the accessions by as much as 10-fold. Inter-varietal variation was expressed at the ratio of the maximum to minimum observed (137)Cs transfer factor for seeds ranged from 0.092 to 0.009. The total biomass, time to flowering and maturity, and seed yield had negative relationship to (137)Cs activity concentration in seeds. The results suggest that certain variety/varieties of azuki bean which accumulated less (137)Cs in edible portion with preferable agronomic traits are suitable to reduce the (137)Cs accumulation in food chain on contaminated land.
Faculty of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan.
Khin Thuzar
KT
Win
Faculty of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan.
Aung Zaw
AZ
Oo
Faculty of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan.
Katsuhiro
K
Kojima
Faculty of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan.
Djedidi
D
Salem
College of Bioresources Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa, 252-0880, Japan.
Hiroko
H
Yamaya
Institute of Land Use Systems, Leibniz Center for Agriculutral Landscape Research, Eberswalder Straße 84, 15374, Müncheberg, Germany.
Sonoko Dorothea
SD
Bellingrath-Kimura
Gene Bank, National Institute of Agrobiological Sciences, 2-1-2 Kannondai, Tsukuba, Ibaraki, 305-8602, Japan.
Norihiko
N
Tomooka
Gene Bank, National Institute of Agrobiological Sciences, 2-1-2 Kannondai, Tsukuba, Ibaraki, 305-8602, Japan.
Akito
A
Kaga
Instutute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan.
Naoko
N
Ohkama-Ohtsu
Instutute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan. Electronic address: tadashiy@cc.tuat.ac.jp.
Tadashi
T
Yokoyama
D002588:Cesium Radioisotopes / Q000032:analysis / Q000378:metabolism*; D062406:Fukushima Nuclear Accident; D005838:Genotype; D007564:Japan; D012639:Seeds / Q000378:metabolism*; D012990:Soil Pollutants, Radioactive / Q000032:analysis / Q000378:metabolism*; D013045:Species Specificity; D000070658:Vigna / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism*
D002588:Cesium Radioisotopes; D012990:Soil Pollutants, Radioactive
(137)Cs accumulation; Azuki bean; Screening; Transfer factor