Strategies of tomato and bean plants tolerance to arsenic

Arsenic (As) upward transport from roots was limited by its high toxicity for the radicular and transporter cells. Tomato plants caused an increasing accumulation of arsenic in roots as a strategy for increasing plant tolerance to arsenic; the ratio As in root/As in the aerial part was 69/1. However, bean plants limited the absorption of arsenic by roots, but there was not a limited transport of the absorbed arsenic; the ratio As in roots/As in shoots is 1/1.