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Expression of the ics1 and npr1 genes in Arabidopsis seedlings. Total RNA was isolated from 7-d-old seedlings, treated or not with 100 μm GA3. Bottom: Ethidium bromide-stained gel showing rRNAs. Top section: Quantification of hybridization signals obtained by using a phosphoimage scanner. Data were normalized to the rRNA value. Blots were repeated twice and yielded similar results.
