Figure 7.

Oxidative stress tolerance of salt cress. A, Root elongation assay with paraquat. Salt cress and Arabidopsis seedlings were grown on vertical MS plates containing 1.2% (w/v) agar and 3% Suc. One week after germination, the seedlings were transferred onto either the control MS agar plates (left) or MS agar plates containing 1 μm paraquat (right). The root tips of the seedlings were arranged uniformly along the light-blue line to ensure accurate measurements. Red and yellow bars show root ends of salt cress and Arabidopsis. The pictures were taken 10 d after the seedlings were transferred. B, Root elongation ratio in salt cress (black bar) and Arabidopsis (gray bar) during the exogenous paraquat treatment. The sd of 10 replicated measurements is indicated.