Abstract
The pathogenicity of Alternaria spp. isolated from wheat leaves collected in regions where alternaria leaf blight has been reported was compared with that of IMI reference isolates of A. triticina and A. alternata using two durum and two bread wheat genotypes. To identify isolates putatively corresponding to A. triticina , morphological and DNA sequence analyses based on ribosomal DNA from the internal transcribed spacer (ITS) region (ITS1, 5·8S rRNA gene, ITS2) and toxicity bioassays of culture filtrate were combined. Glasshouse inoculations provided reliable information to assess the pathogenicity of A. triticina isolates on wheat. Alternaria leaf blight symptoms were produced by the A. triticina isolates only on durum wheat cv. Bansi, while A. alternata , A. tenuissima and A. arborescens isolates were found to be nonpathogenic on the wheat cultivars tested. Alternaria triticina isolates were distinguished from other Alternaria species by Simmons and Roberts’ sporulation pattern 6 and two to three conidia per sporulation unit associated with primary conidia bearing long (> 7 µ m) apical secondary conidiophores. Phylogenetic analysis also proved effective at discriminating wheat‐pathogenic A. triticina from other nonpathogenic Alternaria species. Alternaria triticina isolates yielded longer ITS sequences than A. alternata , A. tenuissima and A. arborescens isolates, leading to clear‐cut differences as visualized with agarose gel electrophoresis. Additionally, only culture filtrates of A. triticina isolates caused nonspecific necrotic lesions on leaves of 3‐week‐old wheat plants.
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 7
Claim · model-written summary
Alternaria triticina isolates produced leaf blight symptoms only on durum wheat cv. Bansi
- Taxon
- durum wheat cv. Bansi
Triticum turgidum subsp. durume1 - Treatment
- A. triticina isolatese1
- Interactor
- A. triticinaAlternaria triticinae1pathogen
- Outcome
- Alternaria leaf blight symptomse1
- Comparator
- A. alternata , A. tenuissima and A. arborescens isolatese1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pathogenicity of Alternaria spp. isolated from wheat leaves collected in regions where alternaria leaf blight has been reported”
e1“Alternaria leaf blight symptoms were produced by the A. triticina isolates only on durum wheat cv. Bansi, while A. alternata , A. tenuissima and A. arborescens isolates were found to be nonpathogenic on the wheat cultivars tested”
Claim · model-written summary
A. alternata, A. tenuissima and A. arborescens isolates were nonpathogenic on the wheat cultivars tested
- Taxon
- wheat
Triticum aestivume1 - Treatment
- A. alternata , A. tenuissima and A. arborescens isolatese1
- Interactor
- A. alternata
.jpg?width=60)
Alternaria alternatae1other - Outcome
- nonpathogenice1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“Alternaria leaf blight symptoms were produced by the A. triticina isolates only on durum wheat cv. Bansi, while A. alternata , A. tenuissima and A. arborescens isolates were found to be nonpathogenic on the wheat cultivars tested”
Claim · model-written summary
Glasshouse inoculations gave reliable information on pathogenicity of A. triticina isolates on wheat
- Taxon
- wheatTriticum aestivume2
- Interactor
- A. triticinaAlternaria triticinae2pathogen
- Outcome
- reliable information to assess the pathogenicity of A. triticina isolates on wheate2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Glasshouse inoculations provided reliable information to assess the pathogenicity of A. triticina isolates on wheat”
Claim · model-written summary
Alternaria triticina isolates were distinguished from other Alternaria species by two to three conidia per sporulation unit
- Taxon
- wheatTriticum aestivume0
- Interactor
- Alternaria triticinaAlternaria triticinae3pathogen
- Outcome
- two to three conidia per sporulation unite5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pathogenicity of Alternaria spp. isolated from wheat leaves collected in regions where alternaria leaf blight has been reported”
e3“Alternaria triticina isolates were distinguished from other Alternaria species by”
e5“two to three conidia per sporulation unit associated with primary conidia bearing long”
Claim · model-written summary
Phylogenetic analysis of ITS discriminated A. triticina from other nonpathogenic Alternaria species
- Taxon
- wheatTriticum aestivume0
- Interactor
- Alternaria triticinaAlternaria triticinae6pathogen
- Outcome
- effective at discriminatinge4
- Comparator
- other nonpathogenic Alternaria speciese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pathogenicity of Alternaria spp. isolated from wheat leaves collected in regions where alternaria leaf blight has been reported”
e4“Phylogenetic analysis also proved effective at discriminating”
e5“from other nonpathogenic Alternaria species”
e6“Alternaria triticina isolates yielded longer ITS sequences than A. alternata , A. tenuissima and A. arborescens isolates”
Claim · model-written summary
Alternaria triticina isolates yielded longer ITS sequences than A. alternata, A. tenuissima and A. arborescens isolates
- Taxon
- wheatTriticum aestivume0
- Treatment
- Alternaria triticina isolatese6
- Outcome
- ITS sequencese6
- Direction
- longere6
- Comparator
- A. alternata , A. tenuissima and A. arborescens isolatese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pathogenicity of Alternaria spp. isolated from wheat leaves collected in regions where alternaria leaf blight has been reported”
e6“Alternaria triticina isolates yielded longer ITS sequences than A. alternata , A. tenuissima and A. arborescens isolates”
Claim · model-written summary
Only culture filtrates of A. triticina isolates caused nonspecific necrotic lesions on wheat leaves
- Taxon
- wheatTriticum aestivume0
- Treatment
- culture filtrates of A. triticina isolatese7
- Interactor
- A. triticinaAlternaria triticinae7pathogen
- Outcome
- nonspecific necrotic lesionse7
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pathogenicity of Alternaria spp. isolated from wheat leaves collected in regions where alternaria leaf blight has been reported”
e7“only culture filtrates of A. triticina isolates caused nonspecific necrotic lesions on leaves”
The same questions in other papers
pathogen product · disease · Triticum aestivum (wheat)Positive and negative results
6 papers in the same direction as this paper · 13 in the opposite direction
- positive
- positive
- positive
16 papers more in this group
See all 20 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.