Influences of preharvest spraying Cryptococcus laurentii combined with postharvest chitosan coating on postharvest diseases and quality of table grapes in storage
Influences of preharvest spraying Cryptococcus laurentii combined with postharvest chitosan coating on postharvest diseases and quality of table grapes in storage
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DOI：
10.1016/j.lwt.2009.10.007
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发表时间：
2010-05
期刊：
影响因子：
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通讯作者：
Xianghong Meng;G. Qin;S. Tian
中科院分区：
文献类型：
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作者：
Xianghong Meng;G. Qin;S. Tian
研究了采前喷施罗伦隐球酵母和采后壳聚糖涂膜对鲜食葡萄贮藏期间腐烂和品质的影响。收获前喷洒C.罗伦氏菌（PreA）显著降低了果实的腐烂指数（DI），而壳聚糖涂膜（PCC）提高了果实在0°C贮藏时采前喷雾的效果。PreA与PCC复合处理提高了果实贮藏过程中多酚氧化酶（PPO）和苯丙氨酸解氨酶（PAL）的活性。与同一时期单独使用PreA相比，PreA+PCC处理在贮藏17 d和42 d时分别使果实失重率降低85%和38%。此外，PreA处理使果实可溶性固形物含量（SSC）与可滴定酸（TA）的比值在采收时提高了12%，在贮藏17 d时提高了7%，在贮藏42 d时提高了25%，主要是通过增加SSC和降低TA来实现的。这些结果表明，采前喷雾与C。罗伦氏菌和壳聚糖涂膜处理是一种很有前途的控制鲜食葡萄腐烂和保持品质的管理策略。
The effects of preharvest spray with Cryptococcus laurentii combined with chitosan coating after harvest on decay and quality of table grapes during storage periods were evaluated in the present study. Preharvest spray with C. laurentii (PreA) significantly decreased decay index (DI), and postharvest chitosan coating (PCC) enhanced the effectiveness of the pre-harvest spray when fruits were stored at 0°C. PreA combination with PCC increased the activities of polyphenol oxidase (PPO) and phenylalanine ammonia-lyase (PAL) of fruit in storage. PreA+PCC treatment was effective in reducing weight loss of fruits by 85% at 17d storage and 38% at 42d storage as compared to PreA alone at the same stage. In addition, PreA enhanced the ratio of soluble solids content (SSC) to titratable acid (TA) by 12% at harvest time, 7% at 17d storage and 25% at 42d storage, mainly by increasing SSC and decreasing TA in fruit stored at 0°C. These results suggested that integration of preharvest spray with C. laurentii and postharvest chitosan coating treatment may be a promising management strategy for decay control and quality maintenance of table grapes.