Abstract
The impact of colonization by the arbuscular mycorrhizal fungus (AMF) Glomus mosseae on tomato root necrosis caused by the soil‐borne pathogen Phytophthora parasitica was investigated. Studies in situ permitted infection loci to be identified and the effects of the AMF on numbers to be elucidated. Effects were significant and, 7 and 16 days after inoculation with zoospores of the pathogen, roots of plants colonized by the AMF had 39% and 30%, respectively, fewer infection loci than those that were not. Concurrent studies of the rate of spread of necrosis within roots showed no changes caused by the AMF. At harvest, 26 days following inoculation with the pathogen, 61% of roots of noncolonized plants were necrotic compared with only 31% in AMF‐colonized plants. It is concluded that effects on numbers of infection loci are one mechanism via which AMF achieve biocontrol of this pathogen in tomato. Measures of the effects of the AMF on root system architecture suggest that no significant changes occur and are thus not the reasons for the reduction in infection loci. The implications of these data for agricultural practice and biocontrol research are discussed.
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Claims 6
Claim · model-written summary
Colonization by Glomus mosseae reduced Phytophthora parasitica infection loci on tomato roots by 39% at 7 days after inoculation
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- colonization by the arbuscular mycorrhizal fungus (AMF) Glomus mosseaee0
- Interactor
- Phytophthora parasitica
Phytophthora nicotianaet0pathogen - Second interactor
- Glomus mosseae
Funneliformis mosseaee0biocontrol_agent - Outcome
- infection locie1
- Direction
- fewere1
- Value
- 39%e1
- Qualifier
- 7 and 16 days after inoculatione1
- Comparator
- those that were note1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Biocontrol of the pathogen Phytophthora parasitica by arbuscular mycorrhizal fungi”
e0“The impact of colonization by the arbuscular mycorrhizal fungus (AMF) Glomus mosseae on tomato root necrosis”
e1“Effects were significant and, 7 and 16 days after inoculation with zoospores of the pathogen, roots of plants colonized by the AMF had 39% and 30%, respectively, fewer infection loci than those that were not”
Claim · model-written summary
Colonization by Glomus mosseae reduced Phytophthora parasitica infection loci on tomato roots by 30% at 16 days after inoculation
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- colonization by the arbuscular mycorrhizal fungus (AMF) Glomus mosseaee0
- Interactor
- Phytophthora parasiticaPhytophthora nicotianaet0pathogen
- Second interactor
- Glomus mosseaeFunneliformis mosseaee0biocontrol_agent
- Outcome
- infection locie1
- Direction
- fewere1
- Value
- 30%e1
- Qualifier
- 16 days after inoculatione1
- Comparator
- those that were note1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Biocontrol of the pathogen Phytophthora parasitica by arbuscular mycorrhizal fungi”
e0“The impact of colonization by the arbuscular mycorrhizal fungus (AMF) Glomus mosseae on tomato root necrosis”
e1“Effects were significant and, 7 and 16 days after inoculation with zoospores of the pathogen, roots of plants colonized by the AMF had 39% and 30%, respectively, fewer infection loci than those that were not”
Claim · model-written summary
AMF colonization did not change the rate of spread of Phytophthora parasitica necrosis within tomato roots
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- rootse2
- Treatment
- the AMFe2
- Interactor
- Phytophthora parasiticaPhytophthora nicotianaet0pathogen
- Outcome
- rate of spread of necrosis within rootse2
- Direction
- no changese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Biocontrol of the pathogen Phytophthora parasitica by arbuscular mycorrhizal fungi”
e0“The impact of colonization by the arbuscular mycorrhizal fungus (AMF) Glomus mosseae on tomato root necrosis”
e2“Concurrent studies of the rate of spread of necrosis within roots showed no changes caused by the AMF”
Claim · model-written summary
AMF colonization lowered the proportion of necrotic tomato roots from 61% to 31% at harvest after Phytophthora parasitica inoculation
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- rootse3
- Treatment
- colonization by the arbuscular mycorrhizal fungus (AMF) Glomus mosseaee0
- Interactor
- Phytophthora parasiticaPhytophthora nicotianaet0pathogen
- Second interactor
- Glomus mosseaeFunneliformis mosseaee0biocontrol_agent
- Outcome
- necrotice3
- Direction
- lowerinferrede3
- Value
- 61%e3
- Qualifier
- 31%e3
- Comparator
- noncolonized plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Biocontrol of the pathogen Phytophthora parasitica by arbuscular mycorrhizal fungi”
e0“The impact of colonization by the arbuscular mycorrhizal fungus (AMF) Glomus mosseae on tomato root necrosis”
e3“At harvest, 26 days following inoculation with the pathogen, 61% of roots of noncolonized plants were necrotic compared with only 31% in AMF‐colonized plants”
Claim · model-written summary
Fewer infection loci is one mechanism by which AMF achieve biocontrol of Phytophthora parasitica in tomato
- Taxon
- tomatoSolanum lycopersicume4
- Treatment
- AMFe4
- Outcome
- numbers of infection locie4
- Qualifier
- one mechanism via which AMF achieve biocontrole4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“It is concluded that effects on numbers of infection loci are one mechanism via which AMF achieve biocontrol of this pathogen in tomato”
Claim · model-written summary
AMF colonization did not significantly change root system architecture of tomato
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- the AMFe5
- Outcome
- root system architecturee5
- Direction
- no significant changese5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Measures of the effects of the AMF on root system architecture suggest that no significant changes occur and are thus not the reasons for the reduction in infection loci”
e0“The impact of colonization by the arbuscular mycorrhizal fungus (AMF) Glomus mosseae on tomato root necrosis”
The same questions in other papers
infection · Phytophthora nicotianae · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
mycorrhiza · growth · Solanum lycopersicum (tomato)Positive and negative results
16 papers in the same direction as this paper · 127 in the opposite direction
- positive
- positive
- positive
140 papers more in this group
See all 144 papers →mycorrhiza · Phytophthora nicotianae · Solanum lycopersicum (tomato)Results agree
1 paper in the same direction as this paper
- positive
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.