Journal of Northeast Agriultural University(English Edition)

2019, v.26;No.77(04) 23-30

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Physiological Characteristics of Boscalid Against Botrytis cinerea from Strawberry
Physiological Characteristics of Boscalid Against Botrytis cinerea from Strawberry

Li Pei-qian;Feng Bao-zhen;Sun Nu-nu;

摘要(Abstract):

A total of 96 monoconidial Botrytis cinerea strains were isolated from strawberry field.Physiological characteristics and resistance analysis to boscalid were investigated.Most isolates showed resistant phenotype and the resistance frequency of highly resistant isolates was as high as 45.10%.The effective concentration that inhibited conidia germination by 50% relative to the control values for sensitive isolates ranged from 0.068 to 60.56 μg· mL~(-1) in conidia germination assays.Compared to the sensitive strains, the boscalid-resistant strains had a significant increase in phenylalanine ammonia lyase(PAL) and peroxidase(POD) activity and more sensitivity to boscalid pressure.Fitness analysis showed statistically significant difference between sensitive and resistance isolates.Sequencing of Sdh B gene indicated that a single mutation corresponded to His272.The results suggested that resistance to boscalid in B.cinerea populations could result in failure to control gray mold.These results would enrich the understanding of the resistance mechanism of B.cinerea to boscalid.

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基金项目(Foundation): Supported by the National Natural Science Foundation of China(31501665);; the Program for the Scientific and Technologal Innovation Programs Higher Education Institutions in Shanxi(2019L0849,2019L0851);; the Opening Foundation of Key Laboratory of Environment Change and Resources Use in Beibu Gulf Ministry of Education(Nanning Normal University);; Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation(Nanning Normal University)(NNNU-KLOP-K1904)

作者(Author): Li Pei-qian;Feng Bao-zhen;Sun Nu-nu;

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