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논문 기본 정보

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학술저널
저자정보
Hélvio Gledson Maciel Ferraz (Universidade Federal de Viçosa) Jorge Luis Badel (Universidade Federal de Viçosa) Lúcio Mauro da Silva Guimarães (Universidade Federal de Viçosa) Bruna Paolinelli Reis (Universidade Federal de Viçosa) Marcos Rogério Tótola (Universidade Federal de Viçosa) Rivadalve Coelho Gonçalves (EMBRAPA Acre) Acelino Couto Alfenas (Universidade Federal de Viçosa)
저널정보
한국식물병리학회 The Plant Pathology Journal The Plant Pathology Journal 제34권 제4호
발행연도
2018.8
수록면
269 - 285 (17page)

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Bacterial leaf blight is a major disease of eucalypt, especially under nursery conditions. Different bacterial species have been associated with the disease in several countries, and despite its importance worldwide, it is not clear to date whether similar disease symptoms are caused by the same or by different etiological agents. In this study, 43 bacterial strains were isolated from blighted eucalypt leaves collected in different geographic areas of Brazil and inoculated onto a susceptible eucalypt clone. Polyphasic taxonomy, including morphological, physiological, biochemical, molecular, and pathogenicity tests showed that only certain strains of Xanthomonas axonopodis caused symptoms of the disease. Strains varied in their aggressiveness, but no correlation with geographic origin was observed. MLSA-based phylogenetic analysis using concatenated dnaK, fyuA, gyrB and rpoD gene sequences allocated the strains in a well-defined clade, corresponding to Rademarker’s group RG 9.6. Inoculation of nineteen plant species belonging to seven botanical families with representative strain LPF 602 showed it to be pathogenic only on Eucalyptus spp, and Corymbia spp. Based on distinct biochemical and pathogenic characteristics that differentiate the eucalypt strains from other pathovars of the X. axonopodis species, here we propose their allocation into the new pathovar X. axonopodis pv. Eucalyptorum pv. nov.

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