Abstract
Abstract In Brazil, Paspalum species are commonly used in sports lawns, landscape projects, and as forage for livestock. Paspalum guenoarum plants showing symptoms of take‐all disease were observed in the state of Rio Grande do Sul, Brazil. The fungus Gaeumannomyces graminis is the only species reported associated with this disease on Paspalum . In recent years, new species of Gaeumannomyces have been proposed based on molecular studies, which demonstrated the existence of a species complex. Take‐all affects rice and wheat, but the aetiology of this disease on P . guenoarum is still unknown; this work aimed to elucidate the aetiology of the take‐all on P . guenoarum in Brazil and evaluate possible alternative hosts of agricultural importance. Based on combined phylogenetic analyses of ITS, LSU , TEF‐1α , and RPB1 sequences, the fungal pathogen was identified as Atripes paspali gen. et sp. nov., which is proposed as a new genus in the Magnaporthaceae family. A representative isolate of A. paspali was inoculated on healthy P . guenoarum plants and reproduced the same symptoms of take‐all observed in the field. Furthermore, this fungus is also able to cause take‐all on wheat plants; temperature directly affected the incidence and development of the disease in wheat. Take‐all on P. guenoarum is caused by A. paspali .
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Claims 4
Claim · model-written summary
Phylogenetic analyses of ITS, LSU, TEF-1a and RPB1 sequences identified the take-all pathogen as Atripes paspali gen. et sp. nov., a new genus in Magnaporthaceae.
- Taxon
- Atripes paspaliAtripes paspalie0
- Outcome
- identified as Atripes paspali gen. et sp. nov.e0
Not reportedDirection
Verbatim
e0“the fungal pathogen was identified as Atripes paspali gen. et sp. nov.”
Claim · model-written summary
Inoculation of healthy Paspalum guenoarum plants with an A. paspali isolate reproduced the take-all symptoms seen in the field.
- Taxon
- P . guenoarumPaspalum guenoarume0
- Treatment
- inoculatede0
- Interactor
- A. paspaliAtripes paspalie0pathogen
- Outcome
- the same symptoms of take‐alle0
Not reportedComparatorDirection
Verbatim
e0“A representative isolate of A. paspali was inoculated on healthy P . guenoarum plants and reproduced the same symptoms of take‐all observed in the field”
Claim · model-written summary
The fungus is also able to cause take-all on wheat plants.
- Taxon
- wheat
Triticum aestivume0 - Outcome
- take‐alle0
Not reportedInteractorInteractor roleDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this fungus is also able to cause take‐all on wheat plants”
Claim · model-written summary
Temperature directly affected the incidence and development of take-all disease in wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- temperaturee0
- Outcome
- incidence and development of the diseasee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“temperature directly affected the incidence and development of the disease in wheat”