Fig. 7
Differential expression of the 15 key genes under drought stress. (I): The heat map was visualized by using R heap map function (showed by log10 values) in 0, 7th and 14th day of drought treatment. Gt–Gossypium tomentosum and Gh–Gossypium hirsutum. Yellow– up-regulated, Blue–down-regulated and Black–no expression. (II): Statistical analysis of the RT-qPCR results. Y-axis: relative expression (2−ΔΔCT). a Expression profile of the various genes in leaf of G. tomentosum, b Expression profile of the various genes in leaf of G. hirsutum, c Expression profile of the various genes in root of G. tomentosum, d Expression profile of the various genes in root of G. hirsutum, e expression profile of the various genes in stem of G. tomentosum and f Expression profile of the various genes in stem of G. hirsutum