Quantitative RT-PCR analysis of WBLH1 and WBLH2 in euplasmic and alloplasmic lines of CS. Act was used as an internal control. The transcript levels are shown as values relative to the mRNA levels in pistils of CS. Data are represented as means with standard deviation (n = 3 or n = 4). One and two asterisks respectively indicate statistical significance between pistil and stamen at the 5% and 1% levels (Student's t test). P, pistil; S, stamen; pTs, partially transformed stamen; tSt, transformed stamen.