Identification of Dominant Postharvest Pathogens of Taro and Antifungal Activity of Hinokitiol against Them

doi:10.7506/spkx1002-6630-20190521-248

FOOD SCIENCE ›› 2020, Vol. 41 ›› Issue (12): 136-142.doi: 10.7506/spkx1002-6630-20190521-248

• Bioengineering • Previous Articles Next Articles

Identification of Dominant Postharvest Pathogens of Taro and Antifungal Activity of Hinokitiol against Them

ZHAO Lumiao, GAO Haiyan, LIU Ruiling, DING Yuting, HAN Yanchao, CHEN Hangjun

(1. College of Food Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China; 2. Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Key Laboratory of Postharvest Preservation and Processing of Fruits and Vegetables, China National Light Industry, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Hangzhou 310021, China)

Online:2020-06-25 Published:2020-06-22

Abstract

Abstract: To provide evidence for the control of taro postharvest diseases, the main pathogens causing postharvest decay of taro and the antifungal effect of hinokitiol against these pathogens were investigated. In this study, the pathogenic fungal strains were isolated from naturally decaying taro grown in Fenghua, Zhejiang province by tissue separation method and identified by morphological characteristics and rDNA-ITS sequence analysis, and their pathogenicity was evaluated by Koch’s postulate. The antifungal activity of hinokitiol was investigated by evaluating its effects on the mycelial growth, spore germination, malondialdehyde content and ultrastructure of the dominant pathogens. The results showed that the two pathogenic strains isolated were identified as Fusarium sp. and Lasiodiplodia theobromae respectively. Hinokitiol exhibited obvious antifungal activity against the pathogens. It inhibited mycelial growth and spore germination, exacerbated membrane lipid peroxidation, and destroyed the subcellular structure of mycelia. Accordingly, this study indicated that hinokitiol can be a promising candidate for the control of postharvest diseases of taro.

Key words: taro, postharvest pathogen, isolation and identification, hinokitiol, antifungal effect

CLC Number:

S379.9

ZHAO Lumiao, GAO Haiyan, LIU Ruiling, DING Yuting, HAN Yanchao, CHEN Hangjun. Identification of Dominant Postharvest Pathogens of Taro and Antifungal Activity of Hinokitiol against Them[J]. FOOD SCIENCE, 2020, 41(12): 136-142.

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Identification of Dominant Postharvest Pathogens of Taro and Antifungal Activity of Hinokitiol against Them

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