Abstract
Initiation of larval growth, induction of cell necrosis, and gall formation in the host were measured as criteria of resistance or susceptibility of tomato seedlings to the root-knot nematode, Meloidogyne incognita (Kofoid &White) Chitwood. Seedlings grown at 27 C on water agar containing additions were scored 3 or 4 days after infection.In the absence of exogenous plant growth regulatory substances, approximately 73% of larvae that entered roots of susceptible plants showed growth, none induced necrosis and nearly all induced gall formation. In roots of a resistant variety, only 4% of the larvae grew, 88% induced necrosis of host cells, and only 29% induced galls. Exogenously supplied cytokinins shifted the response of the resistant plants toward the susceptible reaction. Exogenous kinetin at 0.4 and 0.8 micromolar allowed 55 and 57% of the nematodes to grow, reduced the incidence of necrosis to 32 and 31%, and increased gall formation to 73 and 65%. Three additional cytokinins, Zeatin, 6-(gamma,gamma-dimethylallylamino)purine, and 6-benzylaminopurine produced effects similar to kinetin. Exogenous indoleacetic acid, gibberellic acid, adenine, guanine, uracil, thymine, cytidine, and 6-methylaminopurine neither increased the percentage of larvae which grew nor decreased the extent of host cell necrosis.
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Claims 13
Claim · model-written summary
larvae that entered roots of susceptible plants showed growth in susceptible plants
- Taxon
- Tomatoes
Solanum lycopersicumt0 - Material
- susceptible plantse0
- Interactor
- Meloidogyne incognita
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=60)
Meloidogyne incognitat0pathogen - Outcome
- larvae that entered roots of susceptible plants showed growthe0
- Value
- approximately 73%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=500)
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e0“approximately 73% of larvae that entered roots of susceptible plants showed growth, none induced necrosis and nearly all induced gall formation”
Claim · model-written summary
none induced necrosis in susceptible plants
- Taxon
- TomatoesSolanum lycopersicumt0
- Material
- susceptible plantse0
- Interactor
- Meloidogyne incognitaMeloidogyne incognitat0pathogen
- Outcome
- none induced necrosise0
- Value
- nonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e0“approximately 73% of larvae that entered roots of susceptible plants showed growth, none induced necrosis and nearly all induced gall formation”
Claim · model-written summary
nearly all induced gall formation in susceptible plants
- Taxon
- TomatoesSolanum lycopersicumt0
- Material
- susceptible plantse0
- Interactor
- Meloidogyne incognitaMeloidogyne incognitat0pathogen
- Outcome
- nearly all induced gall formatione0
- Value
- nearly alle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e0“approximately 73% of larvae that entered roots of susceptible plants showed growth, none induced necrosis and nearly all induced gall formation”
Claim · model-written summary
larvae grew in resistant variety
- Taxon
- TomatoesSolanum lycopersicumt0
- Material
- resistant varietye1
- Interactor
- Meloidogyne incognitaMeloidogyne incognitat0pathogen
- Outcome
- larvae grewe1
- Value
- 4%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e1“In roots of a resistant variety, only 4% of the larvae grew, 88% induced necrosis of host cells, and only 29% induced galls.”
Claim · model-written summary
induced necrosis of host cells in resistant variety
- Taxon
- TomatoesSolanum lycopersicumt0
- Material
- resistant varietye1
- Interactor
- Meloidogyne incognitaMeloidogyne incognitat0pathogen
- Outcome
- induced necrosis of host cellse1
- Value
- 88%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e1“In roots of a resistant variety, only 4% of the larvae grew, 88% induced necrosis of host cells, and only 29% induced galls.”
Claim · model-written summary
induced galls in resistant variety
- Taxon
- TomatoesSolanum lycopersicumt0
- Material
- resistant varietye1
- Interactor
- Meloidogyne incognitaMeloidogyne incognitat0pathogen
- Outcome
- induced gallse1
- Value
- 29%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e1“In roots of a resistant variety, only 4% of the larvae grew, 88% induced necrosis of host cells, and only 29% induced galls.”
Claim · model-written summary
Cytokinins shifted resistant tomato responses toward susceptibility.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- Exogenously supplied cytokininse2
- Interactor
- Meloidogyne incognitaMeloidogyne incognitat0pathogen
- Outcome
- response of the resistant plants toward the susceptible reactione2
- Direction
- shiftede2
- Comparator
- resistant plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e2“Exogenously supplied cytokinins shifted the response of the resistant plants toward the susceptible reaction.”
Claim · model-written summary
Kinetin at 0.4 and 0.8 micromolar changed nematodes to grow to 55 and 57%.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- Exogenous kinetin at 0.4 and 0.8 micromolare3
- Interactor
- Meloidogyne incognitaMeloidogyne incognitat0pathogen
- Outcome
- nematodes to growe3
- Direction
- allowede3
- Value
- 55 and 57%e3
- Comparator
- resistant plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e2“Exogenously supplied cytokinins shifted the response of the resistant plants toward the susceptible reaction.”
e3“Exogenous kinetin at 0.4 and 0.8 micromolar allowed 55 and 57% of the nematodes to grow, reduced the incidence of necrosis to 32 and 31%, and increased gall formation to 73 and 65%.”
Claim · model-written summary
Kinetin at 0.4 and 0.8 micromolar changed incidence of necrosis to 32 and 31%.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- Exogenous kinetin at 0.4 and 0.8 micromolare3
- Interactor
- Meloidogyne incognitaMeloidogyne incognitat0pathogen
- Outcome
- incidence of necrosise3
- Direction
- reducede3
- Value
- 32 and 31%e3
- Comparator
- resistant plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e2“Exogenously supplied cytokinins shifted the response of the resistant plants toward the susceptible reaction.”
e3“Exogenous kinetin at 0.4 and 0.8 micromolar allowed 55 and 57% of the nematodes to grow, reduced the incidence of necrosis to 32 and 31%, and increased gall formation to 73 and 65%.”
Claim · model-written summary
Kinetin at 0.4 and 0.8 micromolar changed gall formation to 73 and 65%.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- Exogenous kinetin at 0.4 and 0.8 micromolare3
- Interactor
- Meloidogyne incognitaMeloidogyne incognitat0pathogen
- Outcome
- gall formatione3
- Direction
- increasede3
- Value
- 73 and 65%e3
- Comparator
- resistant plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e2“Exogenously supplied cytokinins shifted the response of the resistant plants toward the susceptible reaction.”
e3“Exogenous kinetin at 0.4 and 0.8 micromolar allowed 55 and 57% of the nematodes to grow, reduced the incidence of necrosis to 32 and 31%, and increased gall formation to 73 and 65%.”
Claim · model-written summary
Three additional cytokinins had effects similar to kinetin.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- Zeatin, 6-(gamma,gamma-dimethylallylamino)purine, and 6-benzylaminopurinee4
- Interactor
- Meloidogyne incognitaMeloidogyne incognitat0pathogen
- Outcome
- effects similar to kinetine4
- Direction
- similare4
- Comparator
- kinetine4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e4“Three additional cytokinins, Zeatin, 6-(gamma,gamma-dimethylallylamino)purine, and 6-benzylaminopurine produced effects similar to kinetin.”
Claim · model-written summary
The listed exogenous substances did not change percentage of larvae which grew in the reported direction.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- Exogenous indoleacetic acid, gibberellic acid, adenine, guanine, uracil, thymine, cytidine, and 6-methylaminopurinee5
- Interactor
- Meloidogyne incognitaMeloidogyne incognitat0pathogen
- Outcome
- percentage of larvae which grewe5
- Direction
- neither increasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e5“Exogenous indoleacetic acid, gibberellic acid, adenine, guanine, uracil, thymine, cytidine, and 6-methylaminopurine neither increased the percentage of larvae which grew nor decreased the extent of host cell necrosis.”
Claim · model-written summary
The listed exogenous substances did not change extent of host cell necrosis in the reported direction.
- Taxon
- TomatoesSolanum lycopersicumt0
- Treatment
- Exogenous indoleacetic acid, gibberellic acid, adenine, guanine, uracil, thymine, cytidine, and 6-methylaminopurinee5
- Interactor
- Meloidogyne incognitaMeloidogyne incognitat0pathogen
- Outcome
- extent of host cell necrosise5
- Direction
- nor decreasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomatoes Resistant to Meloidogyne incognita”
e5“Exogenous indoleacetic acid, gibberellic acid, adenine, guanine, uracil, thymine, cytidine, and 6-methylaminopurine neither increased the percentage of larvae which grew nor decreased the extent of host cell necrosis.”
The same questions in other papers
N-benzyladenine · Meloidogyne incognita · Solanum lycopersicum (tomato)Positive and negative results
1 in the opposite direction
- positive
radiation · Meloidogyne incognita · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
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.