Fig. 2.

Identification of cwinv4 mutants. Two independent Arabidopsis T-DNA mutant lines (Alonso et al., 2003), cwinv4-1 (SALK_130163) and cwinv4-2 (SALK_017466C), were obtained from the Arabidopsis Biological Resource Centre and genotyped to obtain homozygous mutant plants. The relative locations of each T-DNA insertion are shown in (A). RT-PCR, performed on RNA isolated from whole flowers, demonstrated that cwinv4-1 is a null mutant, and that AtCWINV4 is expressed significantly lower in cwinv4-2 flowers than in wild-type (B).