齐希梁;刘聪利;宋露露;李明;

• 1:中国农业科学院郑州果树研究所

摘要(Abstract)：

【目的】明确甜樱桃PavSS基因家族在果实成熟过程中的功能。【方法】利用qRT-PCR技术分析了7个蔗糖合成酶基因PavSS1～7在果实发育过程中的表达情况,并分析了蔗糖对PavSS家族基因表达的影响,利用甜樱桃果实的VIGS技术分析了PavSS1与PavSS6基因影响果实成熟的功能。【结果】PavSS1和PavSS2基因在甜樱桃果实发育和成熟过程中均表达,且PavSS1基因表达量是PavSS2基因的10倍以上;PavSS1和PavSS2在果实发育前期表达量逐渐升高,后期表达量逐渐降低。PavSS3和PavSS5基因在整个果实发育期均低表达,且表达量差异不显著。PavSS4和PavSS7基因在果实发育前期表达量高,后期表达量低。PavSS6基因在果实发育初期低表达,随后表达量逐渐升高,并维持较高水平。外施蔗糖显著下调了PavSS1和PavSS6基因的表达,而PavSS2、PavSS3、PavSS4、PavSS5和PavSS7基因的表达变化不显著。沉默甜樱桃果实PavSS1基因抑制了甜樱桃果实成熟,包括果实硬度、ABA含量、花色苷含量和可溶性糖含量发生显著变化以及成熟相关基因的表达量显著下调;而沉默PavSS6基因的甜樱桃果实与空载对照相比,没有显著变化。【结论】PavSS1基因可能是控制甜樱桃果实蔗糖代谢的关键基因,参与了甜樱桃果实成熟过程的调控。

关键词(KeyWords)： 甜樱桃;蔗糖合成酶;PavSS1;PavSS6;果实成熟

Abstract:

Keywords:

基金项目(Foundation): 中国农业科学院科技创新工程专项（CAAS-ASTIP-2020-ZFRI）;; 河南省自然科学基金-青年科学基金（20230041053）

作者(Author): 齐希梁;刘聪利;宋露露;李明;

Email:

DOI: 10.13925/j.cnki.gsxb.20200297

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