Fig. 7

qRT‒PCR and tissue-specific analysis of 3 key genes. A and D show the expression levels of GhF6'H1 in parental and extreme drought stress conditions; B and E show the expression levels of Gh3AT1 in parental and extreme drought stress conditions; C and F show the expression levels of GhPER55 in parental and extreme drought stress conditions; G and J show the tissue specificity of GhF6'H1 in parental drought stress conditions; H and K show the expression of Gh3AT1 in parental drought stress conditions; and I and L show the tissue specificity of GhPER55 in parental drought stress conditions. The statistical method used was two-way analysis of variance; * represents P < 0.05, a significant difference; ** represents P < 0.01, a very significant difference; and *** represents P < 0.001, an extremely significant difference