Abstract:

At the development stage 1 of red petal Gerbera hybrida cultivar ‘Hongditan’, exogenous gibberellins of different concentration at 0, 50, 100, 200, 400, 800 mg/L were sprayed on flower bud, the effect of exogenous gibberellins on petal pigmentation was investigated. Results showed that exogenous gibberellins can promote the anthocyanin biosynthesis, The flavonoids biosynthesis and soluble sugar accumulation were most promoted when the exogenous gibberellins concentrations among 100-200 mg/L, the activity of PAL was improved when the exogenous gibberellins concentrations above 200 mg/L exclusively, so it effects the pigmentation in ray floret.