Plant Protect. Sci., 2010, 46(2):59-65 | DOI: 10.17221/12/2009-PPS

Influence of temperature and species origin on Fusarium spp. and Microdochium nivale pathogenicity to wheat seedlings

Kamil HUDEC1, Darina Muchová2
1 Department of Plant Protection, Slovak Agricultural University, Nitra, Slovak Republic
2 Research and Breeding Station in Malý Šariš, CVRV in Piešťany, Slovak Republic

The influence of temperature and species origin on the in vitro growth rate and pathogenicity of Fusarium and Microdochium nivale (F. avenaceum, F. culmorum, F. graminearum, F. poae, and M. nivale) to wheat seedlings was examined. The mycelial growth of Fusarium avenaceum, F. culmorum, F. graminearum, and F. poae was the fastest at 25°C, and of M. nivale at 15°C. The isolates of F. culmorum, F. graminearum and F. poae originating from mountain regions grew significantly faster at 15°C than those from flatland regions. The isolates from flatland regions grew significantly faster at 25°C than those from mountain regions. F. culmorum and F. graminearum were the most pathogenic species to the root development. The retardation of wheat grain germination caused by the tested species was assessed in descending order: F. culmorum, F. graminearum, M. nivale, F. avenaceum, F. poae. The biomass growth retardation at 15°C was assessed in descending order: F. culmorum, F. graminearum, M. nivale, F. avenaceum, F. poae; at 25°C as follows: F. graminearum, F. culmorum, F. avenaceum, M. nivale, F. poae. The isolates of M. nivale and F. poae originating from mountain regions were significantly more pathogenic than those from flatland regions. The results suggest that there exist different temperature ecotypes and pathotypes of Fusarium species and Microdochium nivale across the territory of the Slovak Republic.

Keywords: Fusarium; wheat; seedlings; pathogenicity; in vitro growth; ecotypes

Published: June 30, 2010  Show citation

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HUDEC K, Muchová D. Influence of temperature and species origin on Fusarium spp. and Microdochium nivale pathogenicity to wheat seedlings. Plant Protect. Sci. 2010;46(2):59-65. doi: 10.17221/12/2009-PPS.
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