Fig. 7.

Expression patterns of GhTT2, GhCYP94C1 and GhRipen2–2 at different stages of leaf senescence. a Transcript levels of GhTT2 during leaf senescence. b Transcript levels of GhCYP94C1 during leaf senescence. c Transcript levels of GhRipen2–2 during leaf senescence. Stage 1 to stage 5 indicate different stages of cotton leaves with different senescence areas, as described previously [35]. GhActin was used as an internal reference. Values represent the means ± SDs. The significance of the data was determined using Student’s t-test (^**P < 0.01 and ^*P < 0.05). The experiment was conducted with three replications