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Expression of petunia RNases in different flower parts. Flowers were harvested at stage 12, and dissected to obtain sepals (Sep), petals (P), stamens (Sta), stigmas (Sti), styles (Sty), ovaries (including nectaries, Ov), and nectaries (N). At the same time, leaves (L), stems (S), and roots (R) were collected. Expression of the four RNase genes was analysed by RT-PCR. Amplification of 18S was used as control for loading. Gels are representative of at least three independent experiments.
