Abstract
ABSTRACT Pyrenophora teres, the causal agent of net blotch of barley (Hordeum vulgare L.), induces a combination of necrosis and extensive chlorosis in susceptible barley cultivars. Cell-free filtrates from both net and spot forms of P. teres; P. teres f. sp. teres, and P. teres f. sp. maculata were found to contain phytotoxic low molecular weight compounds (LMWCs) and proteinaceous metabolites which appear to be responsible for different components of the symptoms induced by the two forms of the pathogen in a susceptible cultivar of barley (cv. Sloop). Proteins induced only brown necrotic spots or lesions similar to those induced by the pathogens 72 h after inoculation. In contrast, LMWCs induced general chlorosis seen 240 h after inoculation but not the localized necrosis. Neither hydrolyzed or heat- or protease-treated proteinaceous metabolites induced the symptoms. This is the first report of the involvement of proteins produced by P. teres in symptom development during net blotch disease of barley.
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Claims 5
Claim · model-written summary
Filtrates from both forms of P. teres contained phytotoxic small compounds and proteinaceous metabolites.
- Taxon
- barley
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Hordeum vulgaret0 - Interactor
- P. teres
Pyrenophora terese0pathogen - Outcome
- phytotoxic low molecular weight compounds (LMWCs) and proteinaceous metabolitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Cell-free filtrates from both net and spot forms of P. teres; P. teres f. sp. teres, and P. teres f. sp. maculata were found to contain phytotoxic low molecular weight compounds (LMWCs) and proteinaceous metabolites”
t0“Barley”
Claim · model-written summary
Pathogen proteins induced brown necrotic spots or lesions after 72 hours.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- Proteinse0
- Interactor
- Pyrenophora teresPyrenophora terest1pathogen
- Outcome
- brown necrotic spots or lesionse0
- Qualifier
- 72 h after inoculatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proteins induced only brown necrotic spots or lesions similar to those induced by the pathogens 72 h after inoculation”
t0“Barley”
t1“Pyrenophora teres”
Claim · model-written summary
Low molecular weight compounds induced general chlorosis after 240 hours.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- LMWCse0
- Interactor
- Pyrenophora teresPyrenophora terest1pathogen
- Outcome
- general chlorosise0
- Qualifier
- 240 h after inoculatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LMWCs induced general chlorosis seen 240 h after inoculation but not the localized necrosis”
t0“Barley”
t1“Pyrenophora teres”
Claim · model-written summary
Low molecular weight compounds did not induce localized necrosis.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- LMWCse0
- Outcome
- localized necrosise0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LMWCs induced general chlorosis seen 240 h after inoculation but not the localized necrosis”
t0“Barley”
Claim · model-written summary
Hydrolyzed, heated, or protease treated proteinaceous metabolites did not induce symptoms.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- hydrolyzed or heat- or protease-treated proteinaceous metabolitese0
- Outcome
- symptomse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither hydrolyzed or heat- or protease-treated proteinaceous metabolites induced the symptoms”
t0“Barley”
The same questions in other papers
metabolite · disease · Hordeum vulgare (barley)Positive and negative results
1 in the opposite direction
- negative
heat · disease · Hordeum vulgare (barley)Positive and negative results
11 in the opposite direction
- negative
- negative
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8 papers more in this group
See all 12 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.