Translocation and depuration of137Cs in tea plants

Translocation of radiocesium from stems and leaves of plants and the effect on radiocesium concentrations in newly emerged plant tissues

“…However, the Ministry of Health, Labor and Welfare (2011) reported that tea leaves that had emerged around early-to-mid April and were collected around early May contained radiocesium in amounts higher than the guidance level in raw food materials set by the Food Safety Commission of Japan, 500 Bq kg À1 (sum of 134 Cs and 137 Cs activities). Topcuoglu et al (1997) reported that 137 Cs from the Chernobyl Nuclear Power Plant accident (CNPP) was stored into the stem of tea trees from old leaves and then translocated to new leaves.…”

Differences in the distribution of radiocesium in deciduous and evergreen fruit trees: A case study

“…In a previous study, new leaves of tea Camellia sinensis (L.) Kuntze accumulated 137 Cs transported directly from the old branches during the growing season after the Chernobyl accident (Topcuoğlu et al 1997). Thus, in the present study, the radiocesium might have been transported from the old leaves of Satsuma mandarin into the new branches, and from the new branches into the new leaves, because the concentration was highest in the old leaves.…”

Gamma Spectrometric Efficiency Measurement Uncertainty of 137Cs in the Vegetation Sample

“…Deposited radionuclides in the soil pass into the vegetation. Radionuclides in the vegetation pass into the human by the consumption of the vegetation within the food chain [2][3][4][5][6]. Therefore, determination and the evaluation of the contamination level and radioactivity concentrations for natural and artificial radionuclides are important for ensuring public health and food sector workers safety.…”