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http://dx.doi.org/10.4489/KJM.20220035

Inhibitory Effects of Aureobasidium pullulans MHAU2101 Isolated from Domestic Pear Blossom Against Fire Blight  

Hyeonseok Oh (Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration)
Hyo-Won Choi (Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration)
Yong Hwan Lee (Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration)
Seung Yeup Lee (Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration)
Mi-Hyun Lee (Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration)
Sang-Keun Oh (Department of Applied Biology, Chungnam National University)
Publication Information
The Korean Journal of Mycology / v.50, no.4, 2022 , pp. 331-341 More about this Journal
Abstract
This study was conducted to identify yeast species isolated from domestic pear blossom through gene sequencing and analysis of morphological characteristics, and to confirm specific yeast species inhibitory effects toward fire blight in immature apples, pears, and crab apple blossoms. Yeast morphological characteristics were consistent with the known characteristics of Aureobasidium pullulans. Nucleotide sequencing of the D1/D2 region of large-subunit (LSU) 26S ribosomal DNA and the internal transcribed spacer (ITS) region confirmed its identity as A. pullulans (MHAU2101). Inoculation of immature fruits with A. pullulans MHAU2101 before exposure to Erwinia amylovora prevented fire blight symptoms in apples and pears. A. pullulans MHAU2101 treated crab apple blossoms had a significantly lower flower infection rate than untreated blossoms, revealing 64% of the potency of streptomycin. The A. pullulans MHAU2101 treated group also displayed lower E. amylovora density in both pistil and hypanthium compared to the untreated group, especially in the hypanthium. This study confirms that A. pullulans MHAU2101 isolated from domestic pear blossom can effectively suppress the onset of fire blight.
Keywords
Aureobasidium pullulans; Biological control; Erwinia amylovora; Fire blight; Yeast;
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Times Cited By KSCI : 3  (Citation Analysis)
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