Objectives:The aim of this study is to determine the mechanism through which 1-methylcyclopropene(1-MCP)affects the quality of red'Fuji'apples,which were stored for a short duration.Materials and Methods:Red‘...Objectives:The aim of this study is to determine the mechanism through which 1-methylcyclopropene(1-MCP)affects the quality of red'Fuji'apples,which were stored for a short duration.Materials and Methods:Red‘Fuji’apples were treated with 1-MCP(1.0μl/L),stored at 25℃for0,12,24,48,72,and 96 h,and ethylene pro-duction was measured.An integrated metabolomic and transcriptomic analysis was performed on apples stored for 24 h.Results:The release of ethylene was significantly delayed from red‘Fuji’apples subjected to 1-MCP treatment.By performing an integrated transcriptome and metabolome analyses,we identified 117 differentially expressed genes(DEGs)and 44 differentially accumulated metabol-ites(DAMs).By performing functional enrichment analysis,we found that DEGs were involved in the following pathways;carbon metabolism(LPD2,gpmA,LTA2,ACC,PSAT1,MdCAS2),phytohormone signal transduction(EBF 7),amino acid metabolism(MdACS-1),fatty acid metab-olism(LOX1.5,KCS4,KAST),energy metabolism(Lhcb1,Lhcb6,PsbY,GPDHC1,PUMP5I,metabolic pathways(TRE1,HEXO1)and cell wall metabolism(CSLG2).Thus,these DEGs were involved in the ripening of fruits,and they controlled the quality of fruits at the post-harvest stage.The metabolites were enriched with DAMs.These were found to be individually involved in the metabolic pathway,secondary metabolite bio-synthesis,phenylpropanoid biosynthesis,flavonoids,and flavonol synthesis.Conclusions:The results indicate that 1-MCP inhibits the biosynthesis of ethylene and suppresses energy metabolism.Moreover,it also downregulates metabolic pathways and the enzymatic genes related to fruit quality.Therefore,1-MCP delays the ripening of fruits at the post-harvest stage.This study helps us understand how 1-MCP treatment affects the ripening and quality of fruits.展开更多
目的:比较Super bond C&B,Fuji Ⅱ,MTA三种材料粘结离体单根管前牙纵裂牙根的粘结强度。方法:选取离体单根管前牙75颗制备成纵裂牙根模型后按数字随机表分成6组。1~3为压力组(每组15颗牙):1组,MTA充填裂缝;2组,Super bond C&B...目的:比较Super bond C&B,Fuji Ⅱ,MTA三种材料粘结离体单根管前牙纵裂牙根的粘结强度。方法:选取离体单根管前牙75颗制备成纵裂牙根模型后按数字随机表分成6组。1~3为压力组(每组15颗牙):1组,MTA充填裂缝;2组,Super bond C&B充填裂缝;3组,则用Fuji Ⅱ行裂缝充填。4~6为拉力组(每组10颗牙):4组,MTA充填裂缝;5组,Super C&B充填裂缝;6组,则用Fuji Ⅱ行裂缝充填。用万能力学测试机测定各试件数值,用SPSS 10.0软件包对检测结果进行统计学分析。结果:压力测试显示:Superbond C&B充填纵裂牙根,其抗压能力明显高于MTA组和FujiⅡ组,而后两组之间无明显差异;拉力测试表明:MTA组抗拉能力最差,Fuji Ⅱ组明显高于MTA组但明显低于Super bondC&B组。结论:Super bond C&B粘结离体纵裂牙根的强度最强,抗压和抗拉能力优于FujiⅡ和MTA。展开更多
基金the National Key Research and Development Program of China(2017YFD0401304).
文摘Objectives:The aim of this study is to determine the mechanism through which 1-methylcyclopropene(1-MCP)affects the quality of red'Fuji'apples,which were stored for a short duration.Materials and Methods:Red‘Fuji’apples were treated with 1-MCP(1.0μl/L),stored at 25℃for0,12,24,48,72,and 96 h,and ethylene pro-duction was measured.An integrated metabolomic and transcriptomic analysis was performed on apples stored for 24 h.Results:The release of ethylene was significantly delayed from red‘Fuji’apples subjected to 1-MCP treatment.By performing an integrated transcriptome and metabolome analyses,we identified 117 differentially expressed genes(DEGs)and 44 differentially accumulated metabol-ites(DAMs).By performing functional enrichment analysis,we found that DEGs were involved in the following pathways;carbon metabolism(LPD2,gpmA,LTA2,ACC,PSAT1,MdCAS2),phytohormone signal transduction(EBF 7),amino acid metabolism(MdACS-1),fatty acid metab-olism(LOX1.5,KCS4,KAST),energy metabolism(Lhcb1,Lhcb6,PsbY,GPDHC1,PUMP5I,metabolic pathways(TRE1,HEXO1)and cell wall metabolism(CSLG2).Thus,these DEGs were involved in the ripening of fruits,and they controlled the quality of fruits at the post-harvest stage.The metabolites were enriched with DAMs.These were found to be individually involved in the metabolic pathway,secondary metabolite bio-synthesis,phenylpropanoid biosynthesis,flavonoids,and flavonol synthesis.Conclusions:The results indicate that 1-MCP inhibits the biosynthesis of ethylene and suppresses energy metabolism.Moreover,it also downregulates metabolic pathways and the enzymatic genes related to fruit quality.Therefore,1-MCP delays the ripening of fruits at the post-harvest stage.This study helps us understand how 1-MCP treatment affects the ripening and quality of fruits.
文摘目的:比较Super bond C&B,Fuji Ⅱ,MTA三种材料粘结离体单根管前牙纵裂牙根的粘结强度。方法:选取离体单根管前牙75颗制备成纵裂牙根模型后按数字随机表分成6组。1~3为压力组(每组15颗牙):1组,MTA充填裂缝;2组,Super bond C&B充填裂缝;3组,则用Fuji Ⅱ行裂缝充填。4~6为拉力组(每组10颗牙):4组,MTA充填裂缝;5组,Super C&B充填裂缝;6组,则用Fuji Ⅱ行裂缝充填。用万能力学测试机测定各试件数值,用SPSS 10.0软件包对检测结果进行统计学分析。结果:压力测试显示:Superbond C&B充填纵裂牙根,其抗压能力明显高于MTA组和FujiⅡ组,而后两组之间无明显差异;拉力测试表明:MTA组抗拉能力最差,Fuji Ⅱ组明显高于MTA组但明显低于Super bondC&B组。结论:Super bond C&B粘结离体纵裂牙根的强度最强,抗压和抗拉能力优于FujiⅡ和MTA。