Abstract
Ascochyta blight, a fungal disease caused by Ascochyta rabiei (Pass.) Labr. (teleomorph Didymella rabiei (Kovačevski) v. Arx), is a major constraint to chickpea (Cicer arietinum L.) production. An unusual feature of chickpea plants is the secretion of a highly acidic fluid from glandular trichomes. This exudate was shown to promote germination of conidia of A. rabiei at low concentrations (0.012 and 0.06 mg·mL 1 ) but to inhibit germination at higher concentrations (0.3 and 1.5 mg·mL 1 ). The removal of exudates from plants prior to inoculation with A. rabiei increased infection and, subsequently, disease development in susceptible cultivars. On partially resistant cultivars, however, the effect of removing exudates on infection was not apparent until early podding, when genetic resistance declines. Simulated rain applied prior to inoculation increased disease severity as the volume of simulated rain increased from 1 to 4 mm. Since rainfall is required for dispersal of conidia, host exudates are likely to have little impact on secondary disease spread under field conditions. Exudates may, however, contribute to variability in disease studies conducted on older chickpea plants, especially in controlled environments.Key words: ascochyta blight, epidemiology, screening, Didymella rabiei, Cicer arietinum.
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Claims 4
Claim · model-written summary
Removing chickpea exudates before inoculation with A. rabiei increased infection in susceptible cultivars.
- Taxon
- chickpea
Cicer arietinumt0 - Material
- susceptible cultivarse1
- Treatment
- The removal of exudates from plants prior to inoculatione1
- Interactor
- A. rabiei
.jpg?width=60)
Ascochyta rabieie1pathogen - Outcome
- infectione1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“infection of chickpea”
e1“The removal of exudates from plants prior to inoculation with A. rabiei increased infection and, subsequently, disease development in susceptible cultivars”
Claim · model-written summary
Removing chickpea exudates increased disease development in susceptible cultivars.
- Taxon
- chickpeaCicer arietinumt0
- Material
- susceptible cultivarse1
- Treatment
- The removal of exudates from plants prior to inoculatione1
- Interactor
- A. rabieiAscochyta rabieie1pathogen
- Outcome
- disease developmente1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“infection of chickpea”
e1“The removal of exudates from plants prior to inoculation with A. rabiei increased infection and, subsequently, disease development in susceptible cultivars”
Claim · model-written summary
On partially resistant chickpea cultivars, removing exudates had no apparent effect on infection until early podding.
- Taxon
- chickpeaCicer arietinumt0
- Material
- partially resistant cultivarse2
- Organ / stage
- early poddinge2
- Treatment
- removing exudatese2
- Outcome
- infectione2
- Direction
- not apparente2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“infection of chickpea”
e2“On partially resistant cultivars, however, the effect of removing exudates on infection was not apparent until early podding, when genetic resistance declines”
Claim · model-written summary
Simulated rain applied before inoculation increased chickpea disease severity as its volume rose from 1 to 4 mm.
- Taxon
- chickpeaCicer arietinumt0
- Treatment
- Simulated rain applied prior to inoculatione3
- Outcome
- disease severitye3
- Direction
- increasede3
- Value
- 1 to 4 mme3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“infection of chickpea”
e3“Simulated rain applied prior to inoculation increased disease severity as the volume of simulated rain increased from 1 to 4 mm”
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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.