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Effect of different LET radiations on root growth of ${it Arabidopsis thaliana}$

Yoshihara, Ryohei; Nozawa, Shigeki; Saika, Hiroaki*; Teranishi, Mika*; Toki, Seiichi*; Hidema, Jun*; Sakamoto, Ayako

This study aimed to elucidate the effects of ion beams on ${it Arabidopsis thaliana}$. We focus on (1) what kinds of damage are produced by ion beams, and (2) what kinds of cellular processes are involved in turn the damage into mutations. Our results suggest that 220 MeV carbon ions may induce more numbers of DNA lesions or more severe types of DNA lesions than $$gamma$$-rays and 50 MeV helium ions. Our results also suggest that the considerable amount of DNA lesions induced by $$gamma$$-rays and 50 MeV helium ions are repaired by non-homologous end-joining (NHEJ) repair mechanism, but the majority of DNA lesions induced by 220 MeV carbon ions are not repaired by NHEJ.

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