Infection Characteristics and Interaction of Three Species of Penicillium in the Postharvest Storage of‘Gonggan'Mandarin(Citrus reticulata)  

作　　者：Shaoping ZHANG Chengxiang XU Jinyan LAI Yuchan PENG Chunyan ZHONG Minzhi LIANG 

机构地区：[1]School of Life Sciences,Zhaoqing University,Zhaoqing 526061,China [2]School of Food and Pharmaceutical Engineering,Zhaoqing University,Zhaoqing 526061,China

出　　处：《Agricultural Biotechnology》2022年第3期148-153,共6页农业生物技术（英文版）

基　　金：Supported by Guangdong Science and Technology Planning Project(2014A020208143)。

摘　　要：[Objectives]This study was conducted to understand the infection characteristics of Penicillium on‘Gonggan’mandarin(Citrus reticulata)and its effects on postharvest storage quality.[Methods]Nine inoculation treatments were designed and tested for the three identified Penicillium species,namely:three single inoculation experiments,four compound inoculation experiments,and two controls without inoculation.After treatment,the fruit was put into plastic film fresh-keeping bags and stored at a natural room temperature.The determined and analyzed indexes included fruit disease incidence,disease index,disease symptoms,disease spot expansion speed and weight loss rate,soluble solid content and organic acid content in different inoculation treatments.[Results]All‘Gonggan’fruit inoculated with Penicillium were diseased 2 d after inoculation,and completely rotted 14 d later.Of the three Penicillium species isolated and identified,Penicillium digitorum and its combinations were the most harmful to‘Gonggan’fruit.The hazard of Penicillium italicum was equal to or even weaker than that of Penicillium expansum.Eventually,P.digitorum dominated when coexisting on the same fruit.Different species of Penicillium obviously showed competition and antagonism in the process of growth and infection,especially for P.digitorum which was stronger,but other two species of Penicillium also had obvious self-protection ability.Low-temperature storage played a crucial role in the preservation of‘Gonggan’fruit,because it could significantly inhibit Penicillium infestation,and suppress fruit weight loss and the reduction of the contents of soluble solids and organic acids.[Conclusions]The infection characteristics and interaction relationship of Penicillium in the postharvest storage of‘Gonggan’fruit were revealed.

关 键 词：‘Gonggan’mandarin PENICILLIUM Stab inoculation Incidence characteristics Fruit quality 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]