Abstract
Mornya, P. M. P. and Cheng, F. 2011. The levels of hormone and carbohydrate in autumn and non-autumn flowering tree peonies. Can. J. Plant Sci. 91: 991-998. This study analyzed the levels of gibberellic acid (GA3), indole-3-acetic acid (IAA), cytokinin (CTK) and abscisic acid (ABA) hormones using high-performance liquid chromatography, along with the levels of sucrose, reducing sugar and starch carbohydrates by spectrophotometer during induction, initiation and differentiation stages of bud development in autumn (AFP) and non-autumn (NAFP) flowering tree peony cultivars exhibiting variations in flowering pattern. The experimental design was a randomized complete block with three replications. The variation in flowering pattern between AFP and NAFP was largely influenced by differences in GA3, IAA and CTK levels at different bud developmental stages. The flower formation cycle was completed earlier in AFP than in NAFP, hence flowering was twice annually. Cytokinin, particularly N6-(▵2-isopentenyl)-adenosin...
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