Fig. 4

Comparison of microtubule integrity between the wild-type and mre1 and pcesa3. Effects of 4 h treatment with 400 nM oryzalin on 4-5-d-old wild-type (a), mre1 (b) and pcesa3 (c) roots. In both mutants (b, c) cortical microtubules of transition and fast elongation zone cells appear longer and more integral, compared to those of wild-type roots (a). Scale bars: 20 μm