Journal of Integrative Agriculture ›› 2020, Vol. 19 ›› Issue (5): 1396-1406.DOI: 10.1016/S2095-3119(20)63169-0

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  • 收稿日期:2019-05-05 出版日期:2020-04-01 发布日期:2020-03-25

Effects of INA on postharvest blue and green molds and anthracnose decay in citrus fruit

JING Jia-yi1, ZHANG Hong-yan1, XUE Yao-bi1, ZENG Kai-fang1, 2 
  

  1. 1 College of Food Science, Southwest University, Chongqing 400715, P.R.China
    2 Food Storage and Logistics Research Center, Southwest University, Chongqing 400715, P.R.China
  • Received:2019-05-05 Online:2020-04-01 Published:2020-03-25
  • Contact: Correspondence ZENG Kai-fang, Tel/Fax: +86-23-68250374, E-mail: zengkaifang@hotmail.com
  • About author: JING Jia-yi, E-mail: xndxjjy@163.com;
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (31772027), and the Key Project in Applied Technology of Chongqing Science and Technology Bureau, China (cstc2017shms-xdny80058).

Abstract:

As a synthetic functional analog of salicylic acid, 2,6-dichloroisonicotinic acid (INA) is effective in inducing the host disease resistance of a plant against a pathogen.  The effects of INA on controlling postharvest blue and green molds and anthracnose decay and defense-related enzymes on citrus fruits were investigated, and the ascorbic acid of naturally infected citrus flavedo was also measured.  Results showed that 1.0 mmol L–1 INA treatments significantly reduced blue and green molds and anthracnose decay development on both wound-inoculated fruit and naturally-infected fruit compared with the control fruit.  The treatment effectively enhanced the β-1,3-glucanase (GLU), chitinase (CHI), phenylalanine ammonia-lyase (PAL) and peroxidase (POD) activities and the polyphenol oxidase (PPO) in flavedo.  The results presented here suggest that INA might be used as a chemical fungicide substitution to control postharvest diseases in citrus fruits.

Key words: postharvest ,  citrus fruit ,  INA ,  induced resistance