Table 1.

Surface areas of outer periclinal cell walls of SAM and apical part of flower primordium at different developmental stages

SAM or stage of flower development	Numbers of clv3-2 apices/primordia examined	Cell surface areas in clv3-2 (μm2)	Cell surface areas in Col (μm2)
SAM	3/–	41.69±0.96 a	41.79±0.40
Primordium stages
Initial bulging (and shallow crease)	8/19	33.79±0.85 b	36.55±0.90
Bulge	3/4	39.42±1.79 a	63.16±1.37
Sepal formation	4/5	64.03±1.86 c	49.40±0.68

Values are means ±the standard error. Values of surface areas for the clv3-2 apices, between which differences are significant at the P < 0.05 level of Tukey's HSD test, are indicated by different letters. Data for the wild-type apices (Col, Arabidopsis thaliana ecotype Columbia) included in the last column are taken from Kwiatkowska (2006). In this case all the mean values are significantly different at P <0.05.