Mal-do-pé do arroz: hospedeiros e resistência varietal a Gaeumannomyces graminis var. graminis
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Data
2014-09-30
Título da Revista
ISSN da Revista
Título de Volume
Editor
Alexsander Seleguini
Resumo
Several gramineous plants occurring in rice fields
show symptoms of crown sheath rot of rice, caused by
Gaeumannomyces graminis var. graminis (Ggg), under natural
conditions of infection. The pathogenicity of the Ggg-a 01 isolate,
collected from rice, was tested on seven grass species and eight
cereals, under greenhouse conditions, in order to get information
on host-range and resistance of rice genotypes to crown sheath
rot. The inoculation tests showed that the rice isolate was
pathogenic to weeds such as Echinochloa crusgalli, Pennisetum
setosum, Brachiaria sp., Digitaria horizontalis, Brachiaria
plantaginea, Eleusine indica and Cenchrus echinatus, and that
these species are potential hosts to the pathogen. Winter cereals
such as wheat, oat, rye, barley and triticale, as well as sorghum,
maize and millet, presented different degrees of susceptibility
to the Ggg-a isolate. Significant differences were observed in
relation to lesion height and production of hyphopodia and
perithecia on culms. Perithecia were not observed on millet,
sorghum, southern sandbur and maize. The resistance of 58
upland rice genotypes was tested, and the SCIA16 and SCIA08
genotypes presented lesion height significantly smaller, being
considered resistant, when compared to the highly susceptible
CNAS10351 genotype.
Descrição
v. 44, n. 3, p. 318-324, jul./set. 2014.
Palavras-chave
Oryza sativa L., Patogenicidade, Plantas daninhas, Pathogenicity, Weeds
Citação
PEIXOTO, Cecília do Nascimento; OTTONI, Giselle Ferreira; SILVA-LOBO, Valacia Lemes da; FILIPPI, Marta Cristina Corsi; PRABHU, Anne Sitarama. Mal-do-pé do arroz: hospedeiros e resistência varietal a Gaeumannomyces graminis var. graminis. Pesquisa Agropecuária Tropical, Goiânia, v. 44, n. 3, p. 318-324, jul./set. 2014. Disponível em: < http://www.revistas.ufg.br/index.php/pat/article/view/26517/17129>.