Abstract
SUMMARY The influence of temperature and light on prepenetration development of single and mixed isolates of Puccinia graminis avenae and Puccinia coronata avenae was studied on 0–2% water agar and on leaves of three oat cultivars and on three non‐cultivated species of Avena. Germination of uredospores of P. graminis avenae and P. coronata avenae occurred best at 10–30 o C and at 20 o C respectively. The optimum temperature for germ‐tube growth and for appressorial formation was 20 o C for both rusts. An inverse relationship was observed between light intensity and prepenetration development with maximal germination of uredospores, germ‐tube growth and appressorial formation occurring in darkness. Under optimum conditions maximum percentage germination and appressorium formation of both rusts was attained within 4 and 12 h after inoculation respectively. The proportion of germinated uredospores of crown rust which gave rise to appressoria was about twice that observed for stem rust. No significant differences were observed in prepenetration development between the single and mixed race inocula of the two rusts. Although germination of uredospores was significantly greater on water agar than on oat leaves, there were no significant differences in prepenetration development of the rusts on the various oat cultivars and species examined. Consequently, the data failed to indicate the presence of resistance mechanisms operating during the prepenetration phase of the infection process on the cultivars and species examined.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Puccinia graminis avenae uredospores germinated best at 10–30 o C.
- Taxon
- oat
Avena sativat0 - Interactor
- P. graminis avenae
Puccinia graminise0pathogen - Outcome
- Germination of uredospores of P. graminis avenaee0
- Direction
- beste0
- Value
- 10–30 o Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination of uredospores of P. graminis avenae and P. coronata avenae occurred best at 10–30 o C and at 20 o C respectively”
t0“leaves of three oat cultivars”
Claim · model-written summary
Puccinia coronata avenae uredospores germinated best at 20 o C.
- Taxon
- oatAvena sativat0
- Interactor
- P. coronata avenae
Puccinia coronatae0pathogen - Outcome
- Germination of uredospores of P. graminis avenae and P. coronata avenaee0
- Direction
- beste0
- Value
- 20 o Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination of uredospores of P. graminis avenae and P. coronata avenae occurred best at 10–30 o C and at 20 o C respectively”
t0“leaves of three oat cultivars”
Claim · model-written summary
Both rusts had optimal germ-tube growth and appressorial formation at 20 o C.
- Taxon
- oatAvena sativat0
- Outcome
- germ‐tube growth and for appressorial formatione0
- Direction
- optimume0
- Value
- 20 o Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimum temperature for germ‐tube growth and for appressorial formation was 20 o C for both rusts”
t0“leaves of three oat cultivars”
Claim · model-written summary
Increasing light intensity was inversely related to prepenetration development, with maximal germination, germ-tube growth and appressorial formation in darkness.
- Taxon
- oatAvena sativat0
- Outcome
- prepenetration developmente0
- Direction
- inversee0
- Setting
- darknesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An inverse relationship was observed between light intensity and prepenetration development with maximal germination of uredospores, germ‐tube growth and appressorial formation occurring in darkness”
t0“leaves of three oat cultivars”
Claim · model-written summary
Under optimum conditions, both rusts reached maximum uredospore germination within 4 h after inoculation.
- Taxon
- oatAvena sativat0
- Outcome
- maximum percentage germinatione0
- Direction
- maximume0
- Qualifier
- within 4 and 12 h after inoculation respectivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under optimum conditions maximum percentage germination and appressorium formation of both rusts was attained within 4 and 12 h after inoculation respectively”
t0“leaves of three oat cultivars”
Claim · model-written summary
Under optimum conditions, both rusts reached maximum appressorium formation within 12 h after inoculation.
- Taxon
- oatAvena sativat0
- Outcome
- appressorium formatione0
- Direction
- maximume0
- Qualifier
- within 4 and 12 h after inoculation respectivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under optimum conditions maximum percentage germination and appressorium formation of both rusts was attained within 4 and 12 h after inoculation respectively”
t0“leaves of three oat cultivars”
Claim · model-written summary
The proportion of germinated crown-rust uredospores producing appressoria was about twice that for stem rust.
- Taxon
- oatAvena sativat0
- Outcome
- proportion of germinated uredospores of crown rust which gave rise to appressoriae0
- Direction
- twicee0
- Comparator
- stem ruste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The proportion of germinated uredospores of crown rust which gave rise to appressoria was about twice that observed for stem rust”
t0“leaves of three oat cultivars”
Claim · model-written summary
Single and mixed race inocula did not differ significantly in prepenetration development.
- Taxon
- oatAvena sativat0
- Treatment
- mixed race inoculae0
- Outcome
- prepenetration developmente0
- Direction
- No significant differencese0
- Comparator
- singlee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant differences were observed in prepenetration development between the single and mixed race inocula of the two rusts”
t0“leaves of three oat cultivars”
Claim · model-written summary
Rust uredospore germination was significantly greater on water agar than oat leaves.
- Taxon
- oatAvena sativae0
- Outcome
- germination of uredosporese0
- Direction
- greatere0
- Comparator
- oat leavese0
- Setting
- water agare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“germination of uredospores was significantly greater on water agar than on oat leaves”
Claim · model-written summary
Rust prepenetration development did not differ significantly among the examined oat cultivars and species.
- Taxon
- oatAvena sativae0
- Outcome
- prepenetration development of the rustse0
- Direction
- no significant differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were no significant differences in prepenetration development of the rusts on the various oat cultivars and species examined”
Claim · model-written summary
The data did not indicate prepenetration resistance mechanisms in the oat cultivars or species examined.
- Taxon
- oatAvena sativat0
- Outcome
- resistance mechanisms operating during the prepenetration phase of the infection processe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the data failed to indicate the presence of resistance mechanisms operating during the prepenetration phase of the infection process on the cultivars and species examined”
t0“leaves of three oat cultivars”
The same questions in other papers
inoculation · growth · Avena sativa (oats)Results differ
2 papers in the same direction as this paper · 30 reporting no difference from an alternative
- positive
- positive
- positive
29 papers more in this group
See all 33 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.