Abstract
Massive infusion of conidia of Verticillium albo-atrum Reinke & Berthier induced synchronous secretion of vascular coating in the petiolar xylem vessels of resistant and susceptible tomato near-isolines. More coating formed earlier in resistant than in susceptible plants. In the susceptible plants secretion was delayed in colonized trapping site vessels, but initiated in surrounding uncolonized ones. Controls were infused with water. Samples were quantified by light microscope assay techniques at 18, 48, and 120 h postinoculation for the following parameters: (i) delayed coating effect, (ii) overall coating capacity, and (iii) ability of fungus to "escape" laterally from trapping site vessels. The results showed that susceptibility to Verticillium was absolutely correlated with the presence of the delayed coating effect in the plant and increased ability of the fungus to spread laterally. Treatment of inoculated resistant plants with an inhibitor of coating secretion resulted in conversion to the susceptible phenotype. The progeny of a genetic backcross for the dominant (Ve) and recessive (ve) alleles at the Ve locus (Velve × velve) were assayed for the same parameters as well as for disease resistance based on symptom expression. The results confirmed the previous observations and suggested that in tomato the delayed phenotype is recessive. The data strongly supports two hypotheses: (i) coating forms a barrier against fungal penetration and (ii) the timing of the coating response in trapping site vessels results, directly or indirectly, from expression of the Ve gene.
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Claims 9
Claim · model-written summary
Verticillium conidia induced synchronous vascular coating in resistant and susceptible tomato.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- infusion of conidiae0
- Interactor
- Verticillium albo-atrum
Verticillium albo-atrume0pathogen - Outcome
- secretion of vascular coatinge0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Massive infusion of conidia of Verticillium albo-atrum Reinke & Berthier induced synchronous secretion of vascular coating in the petiolar xylem vessels of resistant and susceptible tomato near-isolines”
Claim · model-written summary
Resistant tomato formed more coating earlier than susceptible plants.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- resistante0
- Outcome
- coatinge0
- Direction
- Moree0
- Comparator
- susceptible plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More coating formed earlier in resistant than in susceptible plants”
t0“tomato”
Claim · model-written summary
Susceptible tomato had delayed coating in colonized vessels but coating began in surrounding vessels.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- secretion was delayed in colonized trapping site vesselse0
- Direction
- delayede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the susceptible plants secretion was delayed in colonized trapping site vessels, but initiated in surrounding uncolonized ones”
t0“tomato”
Claim · model-written summary
Susceptibility correlated with delayed coating.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- VerticilliumVerticilliume0pathogen
- Outcome
- susceptibility to Verticilliume0
- Qualifier
- delayed coating effecte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“susceptibility to Verticillium was absolutely correlated with the presence of the delayed coating effect in the plant”
t0“tomato”
Claim · model-written summary
Susceptibility correlated with increased lateral fungal spread.
- Taxon
- tomatoSolanum lycopersicumt0
- Interactor
- VerticilliumVerticilliume0pathogen
- Outcome
- ability of the fungus to spread laterallye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“susceptibility to Verticillium was absolutely correlated with the presence of the delayed coating effect in the plant and increased ability of the fungus to spread laterally”
t0“tomato”
Claim · model-written summary
Inhibiting coating secretion converted resistant inoculated plants to a susceptible phenotype.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- inhibitor of coating secretione0
- Outcome
- susceptible phenotypee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment of inoculated resistant plants with an inhibitor of coating secretion resulted in conversion to the susceptible phenotype”
t0“tomato”
Claim · model-written summary
Backcross data suggested the delayed coating phenotype is recessive in tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Gene
- Ve locuse1
- Outcome
- delayed phenotype is recessivee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in tomato the delayed phenotype is recessive”
e1“dominant (Ve) and recessive (ve) alleles at the Ve locus”
Claim · model-written summary
Vascular coating was hypothesized to block fungal penetration.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- barrier against fungal penetratione0
- Qualifier
- coatinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“coating forms a barrier against fungal penetration”
t0“tomato”
Claim · model-written summary
Ve expression was hypothesized to determine coating-response timing.
- Taxon
- tomatoSolanum lycopersicumt0
- Gene
- Ve genee0
- Outcome
- timing of the coating responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“timing of the coating response in trapping site vessels results, directly or indirectly, from expression of the Ve gene”
t0“tomato”
The same questions in other papers
storage · disease · Solanum lycopersicum (tomato)Positive and negative results
9 papers in the same direction as this paper · 30 in the opposite direction
- positive
- positive
- positive
36 papers more in this group
See all 40 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.