Figure 5.

Constitutive overexpression of STKR1 reduces plant growth. A, 35S-STKR1 lines 1, 2, and 5 were grown in short-day conditions (8 h of light/16 h of dark) on soil alongside stkr1-1 knockout mutant plants and Columbia-0 (Col-0) as the wild-type control. Photographs were taken every week over a period of 4 weeks. B, Rosette diameter of 35S-STKR1 plants and the stkr1-1 mutant compared with Col-0 as a proxy for plant growth on soil under short-day conditions (8 h of light/16 h of dark). Each value is the mean ± sd of at least three measurements. C, Number of leaves in plants with altered STKR1 expression as compared with the wild type. Leaves were counted 4 weeks after sowing. Asterisks indicate significant differences according to Student’s t test (P < 0.001). Bars represent means ± se (n = 15).