In recently years, rice spikelet rot disease (RSRD) is a kind of fast rising main disease in rice panicle, not only causing rice yield loss but also reducing the quality of rice grains. Based on the morphological, biological and molecular characteristics,four fungal pathogens isolated from the infected rice grains were identified as Fusarium proliferatum, Bipolaris australiensis, Curvularia lunata and Alternaria tenuis, respectively. The four pathogens could grow at 4℃~40℃, pH 3~pH 12. The optimal temperature ranged from 25℃ to 30℃, and the best pH value for sporulation of the four pathogens differed. The four isolates could grow on different carbon and nitrogen sources with great difference in mycelial growth and sporulation. The experimental results indicated that RSRD is a kind of rice panicle disease caused by multipathogens, and the pathogens showed the characteristics of diversity, complexity and pathogenicity differentiation.
HUANG Shiwen1,2, WANG Ling1 , LIU Lianmeng1, LIU Enyong1,2, HOU Enqing1,2, XIAO Danfeng1,2,FAN Zenglan1,2
. Isolation, Identification and Biological Characters of Pathogens of Rice Spikelet Rot Disease[J]. Chinese Journal OF Rice Science, 2012
, 26(3)
: 341
-350
.
DOI: 10.3969/j.issn.10017216.2012.03.013
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