Fig. 2

Comparison of microtubule integrity between the wild-type and than/+. Effects of oryzalin on wild-type (a, c) and than/+ (b, d) roots. Seedlings were transplanted from control medium to substrate with oryzalin 200 nM for 6 h. Cell divisions in the meristematic zone of both wild-type and than/+ are affected, as incomplete cell walls and abnormal phragmoplasts can be observed (a, b arrows). Cortical microtubules are longer and more integral in transition and fast elongation zone cells of than/+ compared to wild-type roots (d; cf. c). Scale bars: 20 μm