Scientia Agricultura Sinica ›› 2005, Vol. 38 ›› Issue (01): 203-207 .

• RESEARCH NOTES • Previous Articles     Next Articles

Effects of Defoliation on Endongenous Hormones and Active Oxygen Metabolism of Sweet Cherry Flower Buds During Dormancy

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  1. 山东农业大学园艺学院
  • Received:2003-07-21 Revised:2004-03-25 Online:2005-01-10 Published:2005-01-10

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Abstract: Effects of picking off leaves on endogenous hormones, H2O2, O2- content, SOD, POD, CAT activities in 8-year-old sweet cherry flower buds during dormancy were investigated, and the effect of picking off leaves on dormancy release was also studied. Results indicated that four kinds of endogenous hormones contents in sweet cherry leaves all dropped after picking off leaves, especially ABA content. GA3 and zeatin content increased steadily during upper stage of picking off leaves and were remarkably higher than the control. Meanwhile, H2O2 content in flower buds increased after picking off leaves, it increased by 34.57% compared with the control after picking off leaves for 30 days. However, O2- ccontent decreased by 25.49% compared with the control. Moreover, SOD activity increased and CAT activity decreased after picking off leaves, which were consistent with the reduce of H2O2 content. POD activity increased after picking off leaves. At last, flower buds after picking off leaves germinated 3－6 days earlier than the control, and released dormancy 2－4 days earlier than the control.

Key words: Picking off leaves, Sweet cherry, Flower buds, Hormone, Active oxygen, Dormancy

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