食品科学 ›› 2020, Vol. 41 ›› Issue (13): 212-220.doi: 10.7506/spkx1002-6630-20190711-155

• 包装贮运 • 上一篇    下一篇

拮抗酵母挥发性单体桂皮醛对草莓采后灰霉病的防治

郭虹娜,刘佳,奚裕婷,周姣,姜毅,汪江琦,张艳芬,肖红梅   

  1. (南京农业大学食品科学技术学院,江苏 南京 210095)
  • 出版日期:2020-07-15 发布日期:2020-07-29
  • 基金资助:
    南京市科委农业科技攻关项目(201805035);江苏省高校优势学科建设工程资助项目

Biocontrol Effect of Volatile Monomer Trans-cinnamaldehyde with Antagonistic Capacity to Yeast on Gray Mold Disease of Postharvest Strawberry Fruit

GUO Hongna, LIU Jia, XI Yuting, ZHOU Jiao, JIANG Yi, WANG Jiangqi, ZHANG Yanfen, XIAO Hongmei   

  1. (College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China)
  • Online:2020-07-15 Published:2020-07-29

摘要: 为探讨采前6 种果袋套袋处理对蜜橘果实采后褪绿行为和贮藏特性的影响,本实验以重庆北碚产早熟蜜橘果实为材料,采前1 个月以6 种不同类型的果袋对蜜橘果实进行套袋处理,采后对套袋蜜橘果实进行乙烯利褪绿处理。结果表明:6 种果袋套袋处理均显著增加蜜橘果实的采收单果质量,与对照组相比增幅为10%~30%;3#、6#和7#果袋套袋处理能明显提高蜜橘果实采收时的果汁总酚质量浓度,使采收时果实更好地着色,缩短果实褪绿所需时间;但贮藏的第40天时,各果袋套袋处理果实L*、a*、b*值整体上无显著差异(P>0.05);与对照相比,6 种果袋套袋处理均不同程度增加贮藏蜜橘果实的腐烂率,其中3#和6#果袋套袋处理果实贮藏期腐烂率最高;与采收时相比,贮藏40 d的过程中,7#果袋套袋处理组果实可溶性固形物、可滴定酸、还原型抗坏血酸水平和果汁总酚质量浓度变化不大。综合以上结果,采前7#果袋(单层黄袋)套袋处理在改善蜜橘果实褪绿效果方面具有一定的应用潜力。

关键词: 蜜橘, 套袋处理, 乙烯褪绿, 采收品质, 贮藏特性

Abstract: This study was conducted to evaluate the effect of volatile organic compounds produced by Hanseniaspora uvarum (H. uvarum), which we have demonstrated previously to have antagonistic activity against yeast, on postharvest gray mold of strawberry fruit and the possible underlying mechanism. Results showed that fumigation treatment with 62.5 μL/L trans-cinnamaldehyde for 3 days had the best effect on controlling gray mold, significantly inhibiting the expansion of the lesion diameter (P < 0.05). In addition, trans-cinnamaldehyde at all concentrations could maintain the color, content of total soluble solid and titratable acidity of strawberry fruit and delay quality deterioration. Fumigation with 62.5 μL/L trans-cinnamaldehyde had the potential to significantly increase the activity of catalase, polyphenoloxidase, ascorbate peroxidase and β-1,3-glucanase, increase the relative expression levels of FaCAT, FaPPO, and FaAPX and delay the decrease in superoxide dismutase activity as compared with the control group. The activity of phenylalanine ammonia lyase first increased and then decreased with increasing treatment time. The relative expression level of FaPAL decreased gradually during the 3-day treatment period, while the relative expression level of FaGLU increased during the later part of this period. Overall, these results indicated that trans-cinnamaldehyde could enhance the defense-related enzymes and genes, thereby maintaining the quality and effectively inhibiting postharvest gray mold in strawberry fruit.

Key words: trans-cinnamaldehyde, strawberry, gray mold, quality, induced resistance, gene expression

中图分类号: