Figure 7.

Growth Phenotypes of Double Mutants.

(A) Morphology of seeds from wild-type, cyct1;4^−/− cyct1;5^−/+, and cyct1;4^−/+ cyct1;5^−/− plants. The aborted seeds from siliques of mutant plants are either pale or brown and shrunken.

(B) Morphology of 6-week-old wild-type and transgenic cdkc;2-1 mutant plants expressing a RNAi construct for CDKC;1. The extent of reduction in the size of the RNAi mutants was correlated with the extent of reduction in the level of CDKC;1 transcripts, as determined by RT-PCR (data not shown).

(C) Morphology of wild-type and transgenic cyct1;5 mutant plants expressing a RNAi construct for CYCT1;4. The altered leaf growth in the RNAi mutants was observed only in mutant plants with reduced levels of CYCT1;4 transcripts, as determined by RT-PCR (data not shown).

(D) Scanning electron microscopy images of rosette leaf surfaces of wild-type and cyct1;5/CYCT1;4 RNAi mutant plants. Bars = 50 μm.