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Controlling of Skin Browning of Pear (cv. Pingguoli) During Storage with Preharvest Gibberellin Spray, Postharvest Hot Water Dipping and Individual Film Wrapping Single or Combination

Author: LiHongXia
Tutor: BiYang
School: Gansu Agricultural University
Course: Agricultural Products Processing and Storage
Keywords: Fruit Physiological disorders Gibberellin Hot water treatment Single fruit capsule
CLC: TS255.3
Type: Master's thesis
Year: 2010
Downloads: 78
Quote: 1
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Abstract


Melanoderma apple-pear postharvest physiological diseases the fruit epidermis showed dark brown spots of varying sizes , severely reducing the appearance of the fruit quality . In this study, preharvest spraying 50mg / L Gibberellin ( GA , 3 < / sub > ) , postharvest 45 ° C hot water ( HWD ) 15min treatment and polyethylene film ( 0.001 mm ) single fruit capsule ( IFW ) alone or in combination to examine their room temperature ( 15 ± 5 ° C ) and low temperature ( ± 1 ° C ) Storage conditions control the apple-pear fruit during storage melanoma , as well as antioxidant properties of the fruit skin ultrastructure and fruit quality of the results showed that : 1. separate ( the GA 3 < / sub > , the HWD , IFW ) and combined treatment ( GA 3 < / sub > HWD HWD IFW , GA 3 < / sub > HWD IFW ) can effectively reduce the apple-pear at room temperature and low temperature during storage melanoderma , which the GA 3 the HWD control effect is most obvious when stored at room temperature 35d , black index only control 1/5 of the cold storage 120d , black index was 30.8 % , followed by HWD dealt with separately . Separate and combined treatment to a certain extent reduced fruit accumulation of MDA , to maintain the integrity of the cell membrane , to improve the POD , CAT , APX and SOD activity , reducing the activity of PPO , the comprehensive to the GA 3 < / sub > HWD deal with the most obvious effect . 3.GA 3 HWD treatment reduced the fruit skin cracks , surface protection Organization was significantly thicker cuticle and waxy layer clear boundaries , the structural integrity of the cell wall , and marked thickening of the middle lamella electronic higher density, the primary wall close to the both sides of the middle lamella , was that the - dark - Ming partition structure to maintain the structural integrity of the cells . Separate and combined treatment to some extent, improve the SSC content of the fruit , maintain high hardness fruit , significantly increased the SSC / TA to improve the sensory quality of the fruit . Overall, to GA 3 < / sub > HWD deal with the most obvious effect on quality to keep . In summary, preharvest spraying GA 3 HWD combination of post-harvest processing can effectively reduce the room temperature and low temperature during storage apple-pear melanoderma control mechanism to maintain the integrity of the cell membrane , improve the anti- oxidase activity , increasing the thickness of the surface protection organization is closely related to the technology can be used as an effective measure for the control of apple-pear during storage melanoderma .

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CLC: > Industrial Technology > Light industry,handicrafts > Food Industry > Fruits, vegetables,nuts processing industry > Fruit and vegetable processing and preservation
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