外源脱落酸对欧李果实活性物质及抗氧化能力的影响

Effects of Exogenous ABA on Active Substances and Antioxidant Ability of Chinese Dwarf Cherry(Cerasus humilis)

为探究喷施脱落酸对欧李果实活性物质及抗氧化能力的影响,本研究对农大6号和农大7号欧李果实分别喷施浓度为25、50、100 mg/L的脱落酸后,测定了类黄酮和总酚含量以及抗氧化指标。结果表明:农大6号欧李果实在3个浓度的脱落酸处理下类黄酮、总酚含量及抗氧化能力降低且低于对照,其中50 mg/L处理后下降幅度最大,对农大6号欧李果实类黄酮和酚类物质合成的抑制效果最明显。25、100 mg/L的脱落酸处理下,农大7号欧李果实的类黄酮、总酚含量和抗氧化能力均高于对照,这两个浓度脱落酸可以促进农大7号欧李果实类黄酮和酚类物质的合成,且100 mg/L促进效果更明显。综上,脱落酸对农大6号欧李果实类黄酮和总酚的抑制作用大于农大7号欧李。

To investigate the effects of exogenous ABA on fruit quality of Chinese Dwarf Cherry(Cerasus humilis),two cultivars(Nongda 6 and Nongda 7)were used as experimental materials.Different concentrations(25,50,100mg/L)of ABA were sprayed to the ripening fruits and the total flavonoid content(TFC),total phenol content(TPC)and antioxidant capacity of treated fruits were determined.The results showed that under the three ABA treatments,the TFC,TPC and antioxidant capacity of Nongda 6 were all decreased,with the greatest decrease observed at 50mg/L.The inhibitory effect of ABA on the synthesis of fruit flavonoids and phenols was the most significant.The TFC,TPC and antioxidant capacity of Nongda 7 treated with 25 and 100 mg/L ABA were higher than those of the control,indicating that ABA at these two concentrations can promote the synthesis of flavonoid and phenol in Nongda 7 fruits,and the promoting effect was more obvious at 100 mg/L.In conclusion,the inhibitory effect of ABA on total phenols and flavonoids in Nongda 6 fruit was greater than that of Nongda 7 fruit.