Fig. 1
Effect of GA3 and GA4 applications in P. suffruticosa cv ‘Luhehong’. a Morphological observation after being transferred into greenhouse for 16 d by exogenous GA3 and GA4 applications, the samples treated by sterile distilled water was used as mock. Bar = 4 cm; b The sprouting percentage after being transferred into greenhouse for 16 d by exogenous GA3 and GA4 applications; c Branch height of shoots, the length of the first leaf and flowering rate after being transferred into greenhouse for 16 d by exogenous GA3 and GA4 applications; d Flowering rate after being transferred into greenhouse for 40 d by exogenous GA3 and GA4 applications. e Effect of GAs treatment on the photosynthesis of tree peony ‘Luhehong’ leaves. Duncan’s test at p < 0.05 after analysis of variance; data were shown as mean ± SD in three biological replicates. The lowercase letters on the histogram represented the differentiation