Table II.

Cell division rate and cell cycle duration in response to external application of 30 nm 2,4-D, 1.0 μm zeatin and in the stp1 mutant

TreatmentDivision RateCell Cycle Duration
cell cell−1h−1 h
Wild type0.047 ± 0.00916.9 ± 1.2
2,4-D0.034 ± 0.00320.1 ± 0.9
Zeatin0.020 ± 0.00524.8 ± 1.3
stp1 0.034 ± 0.00519.1 ± 1.1

Cell division rate was averaged over the whole meristem and cell cycle duration calculated as described in “Material and Methods.” Data report means ± se from 10 roots on d 8 for the wild type (data from Beemster and Baskin, 1998), 10 roots combined from d 6 and 8 for the zeatin and stp1 treatments, and five roots on d 8 for the 2,4-D treatment.