Scientia Agricultura Sinica ›› 2005, Vol. 38 ›› Issue (01): 52-58 .doi: 10.3864/j.issn.0578-1752.as-2003-2024

• TILLAGE & CULTIVATION·PHYSIOLOGY & ECOLOGY • Previous Articles     Next Articles

Comparison of Enzymes Activity Associated with Sucrose Metabolism in the Developing Grains Between Sweet Corn and Normal Corn

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  1. 山东农业大学农学院
  • Received:2003-12-12 Revised:1900-01-01 Online:2005-01-10 Published:2005-01-10

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Abstract: Field experiments were carried out to compare the dynamic variations of enzymes activities of sucrose and starch metabolism in the developing grains of sweet corn (Zea mays L. Seccharata Sturt) and normal corn (Zea mays L. Indentata Sturt). The activities of SS (syntheses and degradation direction) and invertase in grains of sweet corn were higher than those of normal corn, so the increase of sucrose in sweet corn is resulted from the increase of sucrose synthetic ability, but not the reduction of sucrose degradation. The activities of ADPG-PPase, UDPG-PPase and SSS were higher in sweet corn than normal corn, but that of the SSS, SBE, SDE were lower than normal corn. The reductions of SDE activity lead to the accumulation of WSP. The decreases of total starch and amylose percent in total starch were resulted from the reduction of GBSS, SBE and SDE activities.

Key words: Sweet corn, Sucrose, Starch, Enzyme activity

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