Abstract
Three types of colonies (WH, WA, and RA) have been characterized among 2245 isolates of Pseudocercosporella herpotrichoides on the basis of colony growth rate and appearance (W, rapid growth and regular margin; R, slow growth and irregular margin) and of the shape of the majority of conidia (H, coiled; A, straight). Apothecia of Tapesia yallundae (anamorph : P. herpotrichoides) were produced on naturally infected stems of winter wheat and barley. Apothecia of an undetermined discomycete were occasionally observed. The progeny of more than 1700 ascospores from 72 apothecia of T. yallundae was distributed among the three types of colonies. These types remained stable through successive conidial and mycelial subcultures. All three colony types were sometimes obtained from a single apothecium. WH and WA were the most common, while RH was never observed. WA isolates were more often resistant than WH isolates to carbendazim. Inoculations of wheat and barley stems with ascospores of T. yallundae were unsuccessful, while inoculations with conidia or mycelium resulted in eyespot lesions. During equivalent periods, RA isolates were less virulent than WH and WA. Key words: cereals, eyespot, Deuteromycetes, sexual stage, Hordeum vulgare, Triticum aestivum.
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Claims 4
Claim · model-written summary
Tapesia yallundae produced apothecia on naturally infected wheat and barley stems.
- Taxon
- winter wheat and barley
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Hordeum vulgare
Triticum aestivume0 - Organ / stage
- stemse0
- Interactor
- Tapesia yallundae
Oculimacula yallundaee0pathogen - Outcome
- Apotheciae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Apothecia of Tapesia yallundae (anamorph : P. herpotrichoides) were produced on naturally infected stems of winter wheat and barley.”
Claim · model-written summary
Ascospore inoculation of wheat and barley stems was unsuccessful.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume0
- Treatment
- Inoculations of wheat and barley stems with ascospores of T. yallundaee0
- Interactor
- T. yallundaeOculimacula yallundaee0pathogen
- Outcome
- eyespot lesionse0
- Direction
- unsuccessfule0
- Comparator
- inoculations with conidia or myceliume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculations of wheat and barley stems with ascospores of T. yallundae were unsuccessful, while inoculations with conidia or mycelium resulted in eyespot lesions.”
Claim · model-written summary
Conidial or mycelial inoculation of wheat and barley stems caused eyespot lesions.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume0
- Treatment
- inoculations with conidia or myceliume0
- Interactor
- T. yallundaeOculimacula yallundaee0pathogen
- Outcome
- eyespot lesionse0
- Direction
- resulted ine0
- Comparator
- Inoculations of wheat and barley stems with ascospores of T. yallundaee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculations of wheat and barley stems with ascospores of T. yallundae were unsuccessful, while inoculations with conidia or mycelium resulted in eyespot lesions.”
Claim · model-written summary
RA isolates were less virulent than WH and WA isolates over equivalent periods.
- Taxon
- wheat and barleyHordeum vulgareTriticum aestivume1
- Material
- RA isolatese0
- Interactor
- Tapesia yallundaeOculimacula yallundaet0pathogen
- Outcome
- virulente0
- Direction
- lesse0
- Comparator
- WH and WAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During equivalent periods, RA isolates were less virulent than WH and WA.”
t0“Tapesia yallundae”
e1“wheat and barley stems”
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