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The W-box in the promoter region of CAD1-A or CAD1-C3 (A) and RT-PCR detection of GaWRKY1 transcripts in developing seeds of 25 DPA (B). The W-box is underlined. The seeds were collected from G. hirsutum L. cv Zhong-12, a glanded cultivar (g), and G. hirsutum cv GL-5, a glandless cultivar (gl). PCR was performed by 31 cycles of amplification. Histone3 transcripts were amplified as an internal control.
