【目的】研究不同厚度的保鲜袋自发气调包装和乙烯吸收剂对‘玉露香’梨采后生理和贮藏品质的影响,为生产应用提供技术参考。【方法】分别将商业成熟的‘玉露香’梨采用0.02 mm PE袋、0.02 mm PE袋+乙烯吸收剂、0.03 mmPE袋、0.03 mm PE...【目的】研究不同厚度的保鲜袋自发气调包装和乙烯吸收剂对‘玉露香’梨采后生理和贮藏品质的影响,为生产应用提供技术参考。【方法】分别将商业成熟的‘玉露香’梨采用0.02 mm PE袋、0.02 mm PE袋+乙烯吸收剂、0.03 mmPE袋、0.03 mm PE袋+乙烯吸收剂、0.04 mm PE袋和0.04 mm PE袋+乙烯吸收剂扎口处理形成自发气调环境,于温度(0±0.5)℃、相对湿度90%~95%条件下贮藏,并以0.02 mm PE袋不扎口为对照处理。定期监测不同包装袋内O2、CO2和乙烯浓度,在‘玉露香’梨冷藏150 d 和210 d 时测定各处理果实叶绿素荧光参数、叶绿素含量、果实硬度、可溶性固形物、可滴定酸、抗坏血酸、货架期呼吸强度和乙烯释放量等理化指标,并调查果心褐变情况。【结果】采用扎口处理的不同厚度保鲜袋内气体成分在第35 天时达到平衡,气调能力水平由高到低依次为0.04 mm PE袋>0.03 mm PE袋>0.02 mm PE 袋,CO2浓度最高可达到3.2%,最低为0.9%。与其他厚度保鲜袋相比,采用0.03 mm PE袋包装进行自发气调处理能够抑制果皮叶绿素含量、Fm、Fv和Fv/Fm的下降,果实硬度与对照无显著差异,但果心褐变指数显著高于对照,可溶性固形物含量显著低于对照。【结论】0.03 mm PE袋的自发气调可使环境维持在O2为18.7%~19.5%、CO2为1.2%~1.5%时有效保持‘玉露香’梨果实果面绿色,但降低了果实可滴定酸、维生素C等内在品质,同时增加了果心褐变程度。乙烯吸收剂对保绿效果不明显,因此,需要自发气调结合1-MCP处理,从而既达到保绿效果,又能有效维持果实内在品质的目标。展开更多
During storage at 20℃,specific pear cultivars may exhibit a greasy texture and decline in quality due to fruit senescence.Among these varieties,‘Yuluxiang’is particularly susceptible to peel greasiness,resulting in...During storage at 20℃,specific pear cultivars may exhibit a greasy texture and decline in quality due to fruit senescence.Among these varieties,‘Yuluxiang’is particularly susceptible to peel greasiness,resulting in significant economic losses.Therefore,there is an urgent need for a preservative that can effectively inhibit the development of greasiness.Previous studies have demonstrated the efficacy of 1-methylcyclopropene(1-MCP)in extending the storage period of fruits.We hypothesize that it may also influence the occurrence of postharvest peel greasiness in the‘Yuluxiang’pears.In this study,we treated‘Yuluxiang’pears with 1-MCP.We stored them at 20℃while analyzing the composition and morphology of the surface waxes,recording enzyme activities related to wax synthesis,and measuring indicators associated with fruit storage quality and physiological characteristics.The results demonstrate that prolonged storage at 20℃leads to a rapid increase in skin greasiness,consistent with the observed elevations in L^(*),greasiness score,and the content of total wax and greasy wax components.Moreover,there were indications that cuticular waxes underwent melting,resulting in the formation of an amorphous structure.In comparison to controls,the application of 1-MCP significantly inhibited increments in L^(*) values as well as grease scores while also reducing accumulation rates for oily waxes throughout most stages over its shelf period,additionally delaying transitions from flaky-wax structures towards their amorphous counterparts.During the initial 7 d of storage,several enzymes involved in the biosynthesis and metabolism of greasy wax components,including lipoxygenase(LOX),phospholipase D(PLD),andβ-ketoacyl-CoA synthase(KCS),exhibited an increase followed by a subsequent decline.The activity of LOX during early shelf life(0–7 d)and the KCS activity during middle to late shelf life(14–21 d)were significantly suppressed by 1-MCP.Additionally,1-MCP effectively maintained firmness,total soluble solid(TSS)a展开更多
文摘【目的】研究不同厚度的保鲜袋自发气调包装和乙烯吸收剂对‘玉露香’梨采后生理和贮藏品质的影响,为生产应用提供技术参考。【方法】分别将商业成熟的‘玉露香’梨采用0.02 mm PE袋、0.02 mm PE袋+乙烯吸收剂、0.03 mmPE袋、0.03 mm PE袋+乙烯吸收剂、0.04 mm PE袋和0.04 mm PE袋+乙烯吸收剂扎口处理形成自发气调环境,于温度(0±0.5)℃、相对湿度90%~95%条件下贮藏,并以0.02 mm PE袋不扎口为对照处理。定期监测不同包装袋内O2、CO2和乙烯浓度,在‘玉露香’梨冷藏150 d 和210 d 时测定各处理果实叶绿素荧光参数、叶绿素含量、果实硬度、可溶性固形物、可滴定酸、抗坏血酸、货架期呼吸强度和乙烯释放量等理化指标,并调查果心褐变情况。【结果】采用扎口处理的不同厚度保鲜袋内气体成分在第35 天时达到平衡,气调能力水平由高到低依次为0.04 mm PE袋>0.03 mm PE袋>0.02 mm PE 袋,CO2浓度最高可达到3.2%,最低为0.9%。与其他厚度保鲜袋相比,采用0.03 mm PE袋包装进行自发气调处理能够抑制果皮叶绿素含量、Fm、Fv和Fv/Fm的下降,果实硬度与对照无显著差异,但果心褐变指数显著高于对照,可溶性固形物含量显著低于对照。【结论】0.03 mm PE袋的自发气调可使环境维持在O2为18.7%~19.5%、CO2为1.2%~1.5%时有效保持‘玉露香’梨果实果面绿色,但降低了果实可滴定酸、维生素C等内在品质,同时增加了果心褐变程度。乙烯吸收剂对保绿效果不明显,因此,需要自发气调结合1-MCP处理,从而既达到保绿效果,又能有效维持果实内在品质的目标。
基金supported by the Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences(CAAS-ASTIP-RIP)the earmarked fund for the China Agriculture Research System(CARS-28)the Natural Science Foundation of Liaoning Province,China(2021-MS-036)。
文摘During storage at 20℃,specific pear cultivars may exhibit a greasy texture and decline in quality due to fruit senescence.Among these varieties,‘Yuluxiang’is particularly susceptible to peel greasiness,resulting in significant economic losses.Therefore,there is an urgent need for a preservative that can effectively inhibit the development of greasiness.Previous studies have demonstrated the efficacy of 1-methylcyclopropene(1-MCP)in extending the storage period of fruits.We hypothesize that it may also influence the occurrence of postharvest peel greasiness in the‘Yuluxiang’pears.In this study,we treated‘Yuluxiang’pears with 1-MCP.We stored them at 20℃while analyzing the composition and morphology of the surface waxes,recording enzyme activities related to wax synthesis,and measuring indicators associated with fruit storage quality and physiological characteristics.The results demonstrate that prolonged storage at 20℃leads to a rapid increase in skin greasiness,consistent with the observed elevations in L^(*),greasiness score,and the content of total wax and greasy wax components.Moreover,there were indications that cuticular waxes underwent melting,resulting in the formation of an amorphous structure.In comparison to controls,the application of 1-MCP significantly inhibited increments in L^(*) values as well as grease scores while also reducing accumulation rates for oily waxes throughout most stages over its shelf period,additionally delaying transitions from flaky-wax structures towards their amorphous counterparts.During the initial 7 d of storage,several enzymes involved in the biosynthesis and metabolism of greasy wax components,including lipoxygenase(LOX),phospholipase D(PLD),andβ-ketoacyl-CoA synthase(KCS),exhibited an increase followed by a subsequent decline.The activity of LOX during early shelf life(0–7 d)and the KCS activity during middle to late shelf life(14–21 d)were significantly suppressed by 1-MCP.Additionally,1-MCP effectively maintained firmness,total soluble solid(TSS)a
