Went $(1928)$ reported that auxin moves from apical to basal end,i.e.,basipetally. The movement is quite fast; in roots,it is about:
- A$0$ to $1$ $cm/h$
- B$0.1$ to $0.2$ $cm/h$
- C$0.2$ to $0.3$ $cm/h$
- D$0.3$ to $0.4$ $cm/h$
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