Effects of Reactive Oxygen Metabolism on Wizened Bud Development of‘Yulu Xiangli’Pear

doi:10.11923/j.issn.2095-4050.cjas15070007

Abstract

Abstract: The aim of this study was to clarify the mechanism of slowing vegetative growth to reduce wizened bud occurring in‘Yulu Xiangli’pear. Experiments were conducted to investigate the relative reasons induced wizened bud and the change regularity of metabolism of active oxygen during flower bud differentiation using normal flower buds in short shoot from Weixian, Hebei and Taigu, Shanxi as control, wizened bud in Weixian as research material. The results showed that length and diameter of shoot growth in the wizened bud pear orchard were significantly longer than that in normal pear orchards and the time of shoot stopped growing was latest in the wizened bud pear orchard. In the period of flower bud differentiation, the content of SOD, CAT, POD and MDA in shoots in normal pear orchards increased at first and decreased subsequently. But in wizened bud pear orchard, the activity of SOD and POD showed a downtrend, the activity of CAT and content of MDA increased at first and decreased subsequently. Activity of SOD, CAT and POD in the wizened bud were significantly lower than that in normal bud, but the content of MDA was significantly higher. All of above indicated that excessive vegetative growth might lead to the occurrence of wizened bud, which was closely related to the activity of SOD, CAT and POD in buds.

CLC Number:

661.1

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