High magnification of root touching a barrier and bending in response

This higher magnification movie shows a primary root of Arabidopsis (mouse ear cress) encountering an obstacle to its growth (in this case a strategically placed glass slide). The higher resolution shows that the root bends off sideways by building up tension in its tissues due to continued growth and then slipping off sideways. Time lapsed over ~1h. Originally published in The Plant Cell 21: 2341-2356. (C) The Plant Cell.

For research into this response see: Monshausen et al. (2009) The Plant Cell 21: 2341-2356