Fig. 4
Total flavonoid and PA contents in white (YZ1), brown (T) and green (G1–3) cotton fibers. a Total flavonoid contents; b PA contents in white and natural colored cottons; 5D: ovules from 5 DPA; 10D, 15D, 20D: fibers from 10, 15, 20 DPA. Error bars represent the standard error of 3 biological replicates. * and ** represent P < 0.05 and P < 0.01 based on Student’s t test, respectively; c Images of 4-dimethylaminocinnamaldehyde (DMACA) reaction solutions. The five small pictures from left to right correspond to the DMACA reaction solutions of YZ1, G1, G2, G3 and T. For each small picture from left to right correspond to 5 DPA, 10 DPA, 15 DPA, and 20 DPA samples