1-Methylcyclopropene and ethylene pretreatments regulate ripening-associated gene(s) expression of b

• 作 者: WachirayaImsabai;KittiSaiyawan;JingtairSiriphanich;
• 机 构: Department of Horticulture,Faculty of Agriculture at Kamphaeng Saen Kasetsart University,Kamphaeng S
• 出 处: 2015 International Conference on Fruit Quality Biology (第二届果
• 发表日期: 2015年期

　　Banana fruit stored below 12℃ are developing chilling injury(CI)symptoms,evident as peel blackening and abnormal ripening.This research aimed to study the effect of 1-MCP and ethylene on CI,especially abnormal ripening symptoms,of banana fruit.Eighty percentage maturity ofHom Thongand Namwa banana fruit were treated or not treated with 500 mg/L of ethephon or fumigated with 500 nl/L 1-methylcyclopropene(1-MCP)before storage at 4℃ for 8 to 12 days respectively.Every 4 days during storage,the fruit were transferred to 25℃ and evaluated for quality attributes every 2 days.The results showed that banana treated with ethephon showed less CI symptoms than the control and 1-MCP fumigated fruit after transfer to 25℃,respectively.Fruit qualities of all treatments did not change during storage.After transferred to 25℃,it was found that fruit treated with ethephon showed increased TSS,TA and TS contents,ethylene production and respiration rate.In contrast,peel and pulp firmness decreased and was lower than the control and 1-MCP fumigated fruit.BothHom ThongandNamwabananas treated with ethephon normally ripened after transfer to 25℃.Banana treated with ethephon had more mRNA abundance of MA-ACS,MA-ACO and MA-beta amylase than that fruit treated with 1-MCP or the control.In conclusion,both banana fruits pre-treated with ethephon(ethylene)before storage at low temperature normally ripened after transfer to room temperature and had reduced CI symptoms.