杨子琴;李茂;章笑赟;余意;王惠聪;黄旭明;

• 1:华南农业大学园艺学院南方果树生理研究室

摘要(Abstract)：

以储良龙眼为试材,在果实发育的中期和后期分别对结果母枝进行环割+去叶处理,中断果穗碳素营养的供应,研究饥饿胁迫下果实脱落、果实中糖含量及相关酶类的变化。结果表明,龙眼结果母枝环割+去叶处理所产生的饥饿胁迫在处理后2 d内引发果实大量脱落,果实中可溶性糖明显下降,但并未耗尽,因此果实糖含量可能存在一个阈值,低于该阈值,便触发果实的脱落;饥饿胁迫同时还引起了果实糖分组成的变化,蔗糖和葡萄糖相对降幅高于果糖;饥饿胁迫下,蔗糖分解方向的酶活性一度增强,但随着蔗糖含量的降低,蔗糖分解代谢酶活性转而减弱;而饥饿胁迫对SPS催化的蔗糖合成代谢影响不明显。

关键词(KeyWords)： 龙眼;落果;糖代谢;转化酶;蔗糖合成酶;蔗糖磷酸合成酶

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(30871693)

作者(Author): 杨子琴;李茂;章笑赟;余意;王惠聪;黄旭明;

Email:

DOI: 10.13925/j.cnki.gsxb.2011.03.016

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