Fig. 7

Comparison of microtubule integrity between the wild-type and pom2-4. Microtubule integrity in 5-d-old wild-type (a, b) and pom2-4 (c, d) roots, after transplantation to medium containing 200 nM oryzalin for 6 h. Cell divisions in the meristematic root zone are affected by the drug (arrows in a and c). In transition and fast elongation zone cells, pom2-4 exhibits longer and more integral cortical microtubules (d), in comparison to the wild-type, the microtubules of which appear depolymerized and display intense background fluorescence (b). Scale bars: 20 μm