Contrasting patterns of α-thujone accumulation and transcript accumulation in WRC glandless genotype 5038 foliage, which does not accumulate monoterpenes, and monoterpenoid-accumulating genotype 5131 foliage. A, Total monoterpene and α-thujone content in foliage of genotypes 5038 and 5131. Monoterpenes, including thujones, were not detectable (n.d.) in glandless 5038. B, Transcript accumulation for CYP76AA25, CYP750B1, and (+)-sabinene synthase quantified by qRT-PCR. Data are shown as normalized expression against EF-α expression. Error bars show se based on three biological replicates. *, Significant differences of transcript abundance between 5038 and 5131 as determined by t test (P < 0.05).