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Fig. 4. Early flowering and FT expression in SD-grown spa1
mutants depends on CO. (A) Visual phenotype of 83-day-old
wild-type (WT), spa1-7, co, and spa1-7 co mutant plants
grown in SD. (B) Flowering time in SD of genotypes shown in A.
(C) RT-PCR analysis of FT and UBQ10 transcript levels
in 25-day-old plants grown in SD. (D) Quantification of the blots shown
in C. The transcript levels of FT were normalized by the transcript
levels of UBQ10.