Effect of salicylic acid（SA）on chilling injury（CI）of sponge gourd during storage（9 days,9°C）plus shelf life（2 days,20°C）was evaluated in this study.SA treatment at the concentration of 1.5 mmol L^-1 ...Effect of salicylic acid（SA）on chilling injury（CI）of sponge gourd during storage（9 days,9°C）plus shelf life（2 days,20°C）was evaluated in this study.SA treatment at the concentration of 1.5 mmol L^-1 significantly reduced postharvest CI of sponge gourds.Besides,the application of SA could effectively decrease the electrolyte leakage,reduce the accumulation of malondialdehyde（MDA）and total phenolics,enhance the activities of antioxidant enzymes such as superoxide dismutase（SOD）,catalase（CAT）and ascorbate peroxidase（APX）,and inhibit the activities of phenylalanine ammonia-lyase（PAL）and polyphenol oxidase（PPO）.The beneficial effects of SA could be attributed to preserved membrane integrity,inhibited membrane peroxidation,enhanced antioxidant system and suppressed activities of browning related enzymes.In a sense,SA as a postharvest tool may be commercially used in alleviating CI of sponge gourd.展开更多
The antifungal activity of chitosan on a common fungal phytopathogen, Sclerotinia sclerotiorum, and the control effect on sclerotinia rot of carrot were investigated. Mycelial growth and fungal biomass were strongly i...The antifungal activity of chitosan on a common fungal phytopathogen, Sclerotinia sclerotiorum, and the control effect on sclerotinia rot of carrot were investigated. Mycelial growth and fungal biomass were strongly inhibited by chitosan. Using propidium iodide stain combined with fluorescent microscopy, the plasma membrane of chitosan-treated S. sclerotiorum mycelia was observed to be markedly damaged. Concomitantly, protein leakage and lipid peroxidation was also found to be significantly higher in chitosan-treated mycelia compared to the control. Chitosan provided an effective control of sclerotinia rot of carrot, with induction of activity of defense-related enzymes including polyphenoloxidase and peroxidase. These data suggest that the effects of chitosan on sclerotinia rot of carrot may be associated with the direct damage to the plasma membrane and lipid peroxidation of S. sclerotiorum, and the elicitation of defense response in carrot.展开更多
[Objective] The aim was to provide certain theoretical basis for the protection of broccoli. [Method] Exogenous sodium nitroprusside was used to in the experiment. Under the condition of 20 ℃ and RH 95%, the optimal ...[Objective] The aim was to provide certain theoretical basis for the protection of broccoli. [Method] Exogenous sodium nitroprusside was used to in the experiment. Under the condition of 20 ℃ and RH 95%, the optimal SNP concentration of broccoli was determined. [Result] The exogenous SNP could effectively maintain the quality of broccoli, inhabited the yellowing of broccoli and the increasing of cell membrane permeability, and maintain the soluble solids content, decreased the degradation rate of chlorophyll and delayed the loss of VC. [Conclusion] Exogenous sodium nitroprusside can effectively maintain the quality of broccoli to keep it fresh.展开更多
基金supported by the Ministry of Agriculture of China (CARS-25)the Special Fund for Agro-scientific Research in the Public Interest, China (201203095)+2 种基金the National Natural Science Foundation of China (31401536)the Natural Science Foundation of Beijing, China (6144020)the Young Investigator Fund of Beijing Academy of Agricultural and Forestry Sciences of China (201404)
文摘Effect of salicylic acid（SA）on chilling injury（CI）of sponge gourd during storage（9 days,9°C）plus shelf life（2 days,20°C）was evaluated in this study.SA treatment at the concentration of 1.5 mmol L^-1 significantly reduced postharvest CI of sponge gourds.Besides,the application of SA could effectively decrease the electrolyte leakage,reduce the accumulation of malondialdehyde（MDA）and total phenolics,enhance the activities of antioxidant enzymes such as superoxide dismutase（SOD）,catalase（CAT）and ascorbate peroxidase（APX）,and inhibit the activities of phenylalanine ammonia-lyase（PAL）and polyphenol oxidase（PPO）.The beneficial effects of SA could be attributed to preserved membrane integrity,inhibited membrane peroxidation,enhanced antioxidant system and suppressed activities of browning related enzymes.In a sense,SA as a postharvest tool may be commercially used in alleviating CI of sponge gourd.
基金supported by grants from the National Natural Science Foundation of China (31101364)the Ministry of Agriculture of China (CARS-25-E-01 and 201203095)the Beijing Academy of Agriculture and Forestry Sciences,China (CXJJ201304)
文摘The antifungal activity of chitosan on a common fungal phytopathogen, Sclerotinia sclerotiorum, and the control effect on sclerotinia rot of carrot were investigated. Mycelial growth and fungal biomass were strongly inhibited by chitosan. Using propidium iodide stain combined with fluorescent microscopy, the plasma membrane of chitosan-treated S. sclerotiorum mycelia was observed to be markedly damaged. Concomitantly, protein leakage and lipid peroxidation was also found to be significantly higher in chitosan-treated mycelia compared to the control. Chitosan provided an effective control of sclerotinia rot of carrot, with induction of activity of defense-related enzymes including polyphenoloxidase and peroxidase. These data suggest that the effects of chitosan on sclerotinia rot of carrot may be associated with the direct damage to the plasma membrane and lipid peroxidation of S. sclerotiorum, and the elicitation of defense response in carrot.
基金Supported by National Vegetable Industry System Construction
文摘[Objective] The aim was to provide certain theoretical basis for the protection of broccoli. [Method] Exogenous sodium nitroprusside was used to in the experiment. Under the condition of 20 ℃ and RH 95%, the optimal SNP concentration of broccoli was determined. [Result] The exogenous SNP could effectively maintain the quality of broccoli, inhabited the yellowing of broccoli and the increasing of cell membrane permeability, and maintain the soluble solids content, decreased the degradation rate of chlorophyll and delayed the loss of VC. [Conclusion] Exogenous sodium nitroprusside can effectively maintain the quality of broccoli to keep it fresh.
