By arevamirpal::laprimavera
17 May 2011 From the blog of Professor Bin Mori of Tokyo University Graduate School of Agricultural and Life Sciences: Autoradiograph of Equisetum arvense (Horsetail; young shoots are edible), picked on May 3:

Autoradiograph of Equisetum arvense (Horsetail; young shoots are edible), picked in Fukushima on 3 May 2011. Professor Bin Mori of Tokyo University Graduate School of Agricultural and Life Sciences

  This is an enlargement of one part of the skirt. The distribution is uniform, so the particles are likely spores.

Autoradiograph of Equisetum arvense (Horsetail; young shoots are edible), picked in Fukushima on 3 May 2011. This is an enlargement of one part of the skirt. The distribution is uniform, so the particles are likely spores. Professor Bin Mori of Tokyo University Graduate School of Agricultural and Life Sciences

  Autoradiograph of dandelion leaves:

Autoradiograph of dandelion leaves from Fukushima, May 2011. Professor Bin Mori of Tokyo University Graduate School of Agricultural and Life Sciences

Professor Mori says the pictures show that radioactive materials have been absorbed from the roots and distributed throughout the plants. He thinks the dark dots on the dandelion leaves are where the radioactive materials landed on the leaves. Professor doesn’t recommend tempura made out of these spring delicacies.

Radioactive Dandelion and Horsetail