Abstract:

In order to determine contents of sucrose and starch and related metabolic enzyme activities, the leaves, stolons, new corms and cormels in ‘Rose Supreme' were studied. The results indicated that the sequence of sucrose content is leaves>new corms and cormels>stolons. The starch contents of leaves and stolons were lower than new corms and cormels. Sucrose phosphate synthase (SPS) activity was higher in the leaves than stolons, except in new corms and cormels. At the early development stage of Gladiolus hybridus, the activity of sucrose synthase (SS) was lower in all parts, but ascended quickly in the new corms comparated descended in the leaves at the late stage. The sequence of acid invertase (AI) activity is leaves>stolons>cormels>new corms. The activity of neutral invertase (NI) in leaves was higher than other parts, and stolon was ascended, whereas new corm was ascended firstly then descended. The activities of Qenzyme increased except leaves. The activities of amylase ascended first then descended. The activities of Q enzyme and amylase in the new corms and cormels were higher than in the leaves and stolons. From the development process of \%G. hybridus, sucrosemetablizing are integrately controlled by AI, NI, SPS and SS. Qenzyme and amylase play important roles in metabolizing of starch.

Key words: Gladiolus hybridus, sucrose, starch, enzymes of sucrose synthase, enzymes of starch synthase