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http://dx.doi.org/10.7744/cnujas.2010.37.3.341

Phylogenetic Analysis, Morphology and Pathogenicity of Penicillium spp. associated with Blue Mold of Apple in Korea  

Sang, Hyun-Kyu (Dept. Applied Biology, Chungnam National University)
Choi, Young-Phil (Dept. Applied Biology, Chungnam National University)
Yu, Seung-Hun (Dept. Applied Biology, Chungnam National University)
Publication Information
Korean Journal of Agricultural Science / v.37, no.3, 2010 , pp. 341-350 More about this Journal
Abstract
Blue mold is the most important postharvest disease of apples in Korea. Apple fruits with blue mold symptoms were collected from storages in different locations in Korea and were investigated for their association with Penicillium species. A total of sixty five isolates of Penicillium were sampled from the collected apples. Based on DNA sequence analysis of ${\beta}$-tublin gene and ITS and lsu rDNA (ID region) and morphological characteristics, they were identified as P. crustosum, P. expansum, P. italicum, P. solitum and P. sp.. P. sp. which is closely related to P. hirsutum is a new species, not reported before. P. expansum (35%) was predominant species followed by P. crustosum. The phylogenetic tree inferred from combined ${\beta}$-tublin and ID region sequence showed good correlation with species that are defined by morphological characteristics. In pathogenicity test, apples were wound-inoculated with conidial suspension and incubated at $20-22^{\circ}C$. The most severe and destructive species was P. expansum. The species caused a decayed area 42-50mm in diameter after 8-10days. Decayed area caused by P. crustosum and P. sp. was 26-32mm and 20-26mm, respectively. This is the first record of P. crustosum, P. italicum and P. sp. from apple in Korea.
Keywords
Apple; Penicillium species; ${\beta}$-tubulin; ITS and lsu rDNA; Morphological characteristics; Pathogenicity;
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