(E) Determination of the effect of the arp4-1, arp6 and swc6-1 mutations on flowering time. The top panel shows the number of rosette leaves in the WT, arp4-1, arp6, and swc6-1 mutant plants; the bottom panel shows a photograph of the plants. Rosette leaves from at least 20 plants were counted for each genotype. Values are mean ± SD. ** P<0.01, student's t test. 