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Silencing of RhHB6 promotes flower senescence. A, Expression of the RhHB6 and RhPR10.1 genes in RhHB6-silenced and TRV control petals was analyzed by qRT-PCR. B, The time of flower opening and senescence phases was recorded. C, The phenotypes of flowers were recorded and photographed every day. The results are the means of three biological replicates with standard deviations. Asterisks indicate statistically significant differences (Student’s t test, *P < 0.05, **P < 0.01).
