IAA、GA和ABA对苹果果实山梨醇代谢相关酶活性的影响

 以‘新红星’苹果果实为试材, 采用果肉圆片孵育技术, 研究了IAA、GA和ABA对SDH和SOX活性的影响以及二者之间的相关性。结果表明: 苹果果实发育过程中SOX活性与IAA、GA和ABA含量间存在显著的负相关关系, 而SDH活性只与GA含量有显著的负相关关系。外源IAA和GA均显著诱导果实SOX活性增加, 对发育前期果实的诱导作用最为显著; ABA仅对发育后期果实的SOX活性具有显著的诱导作用。果实发育前期和发育后期SDH活性受到外源ABA的显著激活; 而外源IAA仅提高发育前期果实的SDH活性。

Effects of IAA, GA and ABA on Activities of Related Enzymes of Sorbitol Metabolism in Developing Apple Fruit

The regulating effects of IAA,GA and ABA on activities of SDH and SOX were studied in the fruits of'Starkrimson'apple through disk incubation technique.The results showed that the activities of SOX had significant negative correlation with the concentrations of IAA,GA and ABA during fruit developmental period.However,the activities of SDH only had significant negative correlation with GA contents.The results also indicated that exogenous IAA and GA highly increased the activities of SOX in apple fruit,especially to the fruit at early developmental period.Moreover,the exogenous ABA showed the highest regulating effects on SOX activity in the fruit at late developmental stage.On the other hand,exogenous ABA increased the SDH activity significantly,however,IAA only increased the activities of SDH.