Abstract
Inoculation with Streptomyces scabies significantly (P < 0.05) reduced shoot height of seedlings in 11 of 14 plant species tested. Reduction in shoot height was 53 to 89% in crucifers and 35 to 67% in legumes, whereas effects on monocot seedlings were more variable. Other symptoms on seedlings included necrosis of roots and thickening of roots and shoots. S. scabies strain 87-22 was more virulent on seedlings than was strain 84-34. A nonpathogen, S. lividans strain TK24, did not consistently reduce the seedling height of any plant species and did not produce growth abnormalities or necrosis. Both supernatants of cultures of S. scabies strains and thaxtomin A, a phytotoxin produced by S. scabies, reproduced the symptoms of pathogenic strains on seedlings. Concentrations of 50 to 100 μM thaxtomin A greatly reduced the total length of radish seedlings and caused tissue necrosis and death, whereas concentrations of 10 to 25 μM caused shoot and root stunting and thickening. Cross sections of roots and shoots demonstrated that tissue thickening was due to cell hypertrophy, rather than cell hyperplasia. Thaxtomin A is a broad-spectrum phytotoxin and may be responsible for plant pathogenicity in S. scabies.
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Claims 14
Claim · model-written summary
Inoculation with Streptomyces scabies significantly reduced seedling shoot height in 11 of 14 plant species.
- Taxon
- plant speciese0
- Treatment
- Inoculation with Streptomyces scabiese0
- Interactor
- Streptomyces scabiesStreptomyces scabieie0pathogen
- Outcome
- shoot heighte0
- Direction
- reducede0
- Value
- 11 of 14e0
Not reportedComparator
Verbatim
e0“Inoculation with Streptomyces scabies significantly (P < 0.05) reduced shoot height of seedlings in 11 of 14 plant species tested”
Claim · model-written summary
Inoculation with Streptomyces scabies reduced shoot height of crucifer seedlings by 53 to 89%.
- Taxon
- cruciferse1
- Treatment
- Inoculation with Streptomyces scabiese0
- Interactor
- Streptomyces scabiesStreptomyces scabieie0pathogen
- Outcome
- shoot heighte1
- Direction
- Reductione1
- Value
- 53 to 89%e1
Not reportedComparator
Verbatim
e0“Inoculation with Streptomyces scabies significantly (P < 0.05) reduced shoot height of seedlings in 11 of 14 plant species tested”
e1“Reduction in shoot height was 53 to 89% in crucifers and 35 to 67% in legumes, whereas effects on monocot seedlings were more variable”
Claim · model-written summary
Inoculation with Streptomyces scabies reduced shoot height of legume seedlings by 35 to 67%.
- Taxon
- legumese1
- Treatment
- Inoculation with Streptomyces scabiese0
- Interactor
- Streptomyces scabiesStreptomyces scabieie0pathogen
- Outcome
- shoot heighte1
- Direction
- Reductione1
- Value
- 35 to 67%e1
Not reportedComparator
Verbatim
e0“Inoculation with Streptomyces scabies significantly (P < 0.05) reduced shoot height of seedlings in 11 of 14 plant species tested”
e1“Reduction in shoot height was 53 to 89% in crucifers and 35 to 67% in legumes, whereas effects on monocot seedlings were more variable”
Claim · model-written summary
Effects of Streptomyces scabies on monocot seedlings were more variable.
Verbatim
e1“Reduction in shoot height was 53 to 89% in crucifers and 35 to 67% in legumes, whereas effects on monocot seedlings were more variable”
Claim · model-written summary
Streptomyces scabies caused necrosis of roots and thickening of roots and shoots of seedlings.
- Taxon
- seedlingse2
- Interactor
- Streptomyces scabiesStreptomyces scabieie0pathogen
- Outcome
- necrosis of rootse2
- Qualifier
- thickening of roots and shootse2
Verbatim
e0“Inoculation with Streptomyces scabies significantly (P < 0.05) reduced shoot height of seedlings in 11 of 14 plant species tested”
e2“Other symptoms on seedlings included necrosis of roots and thickening of roots and shoots”
Claim · model-written summary
Streptomyces scabies strain 87-22 was more virulent on seedlings than strain 84-34.
Verbatim
e3“S. scabies strain 87-22 was more virulent on seedlings than was strain 84-34”
Claim · model-written summary
The nonpathogen Streptomyces lividans strain TK24 did not consistently reduce seedling height.
- Taxon
- plant speciese4
- Treatment
- S. lividans strain TK24e4
- Interactor
- S. lividansStreptomyces lividanse4other
- Outcome
- seedling heighte4
- Direction
- did not consistently reducee4
Not reportedComparator
Verbatim
e4“A nonpathogen, S. lividans strain TK24, did not consistently reduce the seedling height of any plant species and did not produce growth abnormalities or necrosis”
Claim · model-written summary
The nonpathogen Streptomyces lividans strain TK24 did not produce growth abnormalities or necrosis on plant species.
- Taxon
- plant speciese4
- Interactor
- S. lividansStreptomyces lividanse4other
- Outcome
- growth abnormalities or necrosise4
Verbatim
e4“A nonpathogen, S. lividans strain TK24, did not consistently reduce the seedling height of any plant species and did not produce growth abnormalities or necrosis”
Claim · model-written summary
Supernatants of Streptomyces scabies cultures reproduced the symptoms of pathogenic strains on seedlings.
- Taxon
- seedlingse5
- Treatment
- supernatants of cultures of S. scabies strainse5
- Interactor
- S. scabiesStreptomyces scabieie5pathogen
- Outcome
- symptoms of pathogenic strainse5
- Direction
- reproducede5
Not reportedComparator
Verbatim
e5“Both supernatants of cultures of S. scabies strains and thaxtomin A, a phytotoxin produced by S. scabies, reproduced the symptoms of pathogenic strains on seedlings”
Claim · model-written summary
Thaxtomin A reproduced the symptoms of pathogenic strains on seedlings.
- Taxon
- seedlingse5
- Treatment
- thaxtomin Ae5
- Interactor
- S. scabiesStreptomyces scabieie5pathogen
- Compound
- thaxtomin Ae5
- Outcome
- symptoms of pathogenic strainse5
- Direction
- reproducede5
Not reportedComparator
Verbatim
e5“Both supernatants of cultures of S. scabies strains and thaxtomin A, a phytotoxin produced by S. scabies, reproduced the symptoms of pathogenic strains on seedlings”
Claim · model-written summary
Thaxtomin A at 50 to 100 μM greatly reduced total length of radish seedlings and caused tissue necrosis and death.
- Taxon
- radish seedlings
Raphanus sativuse6 - Treatment
- Concentrations of 50 to 100 μM thaxtomin Ae6
- Compound
- thaxtomin Ae6
- Outcome
- total lengthe6
- Direction
- greatly reducede6
- Qualifier
- caused tissue necrosis and deathe6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Concentrations of 50 to 100 μM thaxtomin A greatly reduced the total length of radish seedlings and caused tissue necrosis and death”
Claim · model-written summary
Thaxtomin A at 10 to 25 μM caused shoot and root stunting and thickening of radish seedlings.
- Taxon
- radish seedlingsRaphanus sativuse6
- Treatment
- concentrations of 10 to 25 μMe7
- Compound
- thaxtomin Ae6
- Outcome
- shoot and root stunting and thickeninge7
- Direction
- causede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Concentrations of 50 to 100 μM thaxtomin A greatly reduced the total length of radish seedlings and caused tissue necrosis and death”
e7“whereas concentrations of 10 to 25 μM caused shoot and root stunting and thickening”
Claim · model-written summary
Tissue thickening in seedlings was due to cell hypertrophy rather than cell hyperplasia.
Verbatim
e0“Inoculation with Streptomyces scabies significantly (P < 0.05) reduced shoot height of seedlings in 11 of 14 plant species tested”
e6“Cross sections of roots and shoots demonstrated that tissue thickening was due to cell hypertrophy, rather than cell hyperplasia”
Claim · model-written summary
Thaxtomin A may be responsible for plant pathogenicity of Streptomyces scabies.
- Taxon
- plant speciese0
- Interactor
- Streptomyces scabiesStreptomyces scabieie0pathogen
- Compound
- Thaxtomin Ae7
- Outcome
- plant pathogenicitye7
Verbatim
e0“Inoculation with Streptomyces scabies significantly (P < 0.05) reduced shoot height of seedlings in 11 of 14 plant species tested”
e7“Thaxtomin A is a broad-spectrum phytotoxin and may be responsible for plant pathogenicity in S. scabies”
The same questions in other papers
inoculation · growth · Raphanus sativus (radish)Positive and negative results
2 papers in the same direction as this paper · 22 in the opposite direction
- positive
- positive
- positive
21 papers more in this group
See all 25 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.