Abstract
Effect of nitrogen sources on mycelial growth and sclerotial formation of Rhizoctonia solani causing rice sheath blight was studied by using sixty isolates from diseased samples of different localities in Chungbuk area. Based on the cultural characters, pathogenicity and sclerotial formation, three isolates of the fungus were selected. The virulence of the three isolates varied based on the percent of seeds germination, seedling blights and length and lesion number of lesions. As nitrogen sources, arginine, alanine, urea, ammonium sulfate and sodium nitrate were more effective for mycelial growth and sclerotial formation, than were cystine, methionine, lysine, histidine, tryptophan and thyrosine. The mycelium of R. so/ani grew well in a lower concentration of urea, sodium nitrate, arginine, ammonium sulfate and lysine, but in a higher concentration of proline, histidine, and alanine. In all nitrogen sources tested, high concentration of nitrogen nutrients greatly stimulated sclerotial formation of the fungus. Arginine, urea, and ammonium sulfate increased virulence of the fungus. All the isolates grown on the basic medium plus proline produced large sclerotia. Mycelial growth of the fungus was not well in the tryptophan-added medium, showing brown discoloration of medium.
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Claims 9
Claim · model-written summary
Three Rhizoctonia isolates varied in virulence measured by seed germination, seedling blight and lesion traits.
- Taxon
- Rice
Oryza sativat0 - Interactor
- Rhizoctonia solani
Rhizoctonia solanie1pathogen - Outcome
- virulence of the three isolatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The virulence of the three isolates varied based on the percent of seeds germination, seedling blights and length and lesion number of lesions.”
e1“Rhizoctonia solani causing rice sheath blight”
Claim · model-written summary
Arginine, alanine, urea, ammonium sulfate and sodium nitrate promoted fungal mycelial growth more than the listed alternative nitrogen sources.
- Taxon
- RiceOryza sativat0
- Treatment
- arginine, alanine, urea, ammonium sulfate and sodium nitratee0
- Interactor
- Rhizoctonia solaniRhizoctonia solanie1pathogen
- Outcome
- mycelial growthe0
- Direction
- more effectivee0
- Comparator
- cystine, methionine, lysine, histidine, tryptophan and thyrosinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“arginine, alanine, urea, ammonium sulfate and sodium nitrate were more effective for mycelial growth and sclerotial formation, than were cystine, methionine, lysine, histidine, tryptophan and thyrosine.”
e1“Rhizoctonia solani causing rice sheath blight”
Claim · model-written summary
The same nitrogen sources promoted fungal sclerotial formation more than the alternatives.
- Taxon
- RiceOryza sativat0
- Treatment
- arginine, alanine, urea, ammonium sulfate and sodium nitratee0
- Interactor
- Rhizoctonia solaniRhizoctonia solanie1pathogen
- Outcome
- sclerotial formatione0
- Direction
- more effectivee0
- Comparator
- cystine, methionine, lysine, histidine, tryptophan and thyrosinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“arginine, alanine, urea, ammonium sulfate and sodium nitrate were more effective for mycelial growth and sclerotial formation, than were cystine, methionine, lysine, histidine, tryptophan and thyrosine.”
e1“Rhizoctonia solani causing rice sheath blight”
Claim · model-written summary
Lower concentrations of urea, sodium nitrate, arginine, ammonium sulfate and lysine favored mycelial growth.
- Taxon
- RiceOryza sativat0
- Treatment
- lower concentration of urea, sodium nitrate, arginine, ammonium sulfate and lysinee0
- Interactor
- R. so/anie0pathogen
- Outcome
- mycelium of R. so/ani grew welle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The mycelium of R. so/ani grew well in a lower concentration of urea, sodium nitrate, arginine, ammonium sulfate and lysine, but in a higher concentration of proline, histidine, and alanine.”
Claim · model-written summary
Higher concentrations of proline, histidine and alanine favored mycelial growth.
- Taxon
- RiceOryza sativat0
- Treatment
- higher concentration of proline, histidine, and alaninee0
- Interactor
- R. so/anie0pathogen
- Outcome
- mycelium of R. so/ani grew welle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The mycelium of R. so/ani grew well in a lower concentration of urea, sodium nitrate, arginine, ammonium sulfate and lysine, but in a higher concentration of proline, histidine, and alanine.”
Claim · model-written summary
High concentrations of every tested nitrogen source strongly stimulated fungal sclerotial formation.
- Taxon
- RiceOryza sativat0
- Treatment
- high concentration of nitrogen nutrientse0
- Interactor
- Rhizoctonia solaniRhizoctonia solanie1pathogen
- Outcome
- sclerotial formation of the funguse0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“In all nitrogen sources tested, high concentration of nitrogen nutrients greatly stimulated sclerotial formation of the fungus.”
e1“Rhizoctonia solani causing rice sheath blight”
Claim · model-written summary
Arginine, urea and ammonium sulfate increased fungal virulence.
- Taxon
- RiceOryza sativat0
- Treatment
- Arginine, urea, and ammonium sulfatee0
- Interactor
- Rhizoctonia solaniRhizoctonia solanie1pathogen
- Outcome
- virulence of the funguse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Arginine, urea, and ammonium sulfate increased virulence of the fungus.”
e1“Rhizoctonia solani causing rice sheath blight”
Claim · model-written summary
All isolates on proline-supplemented medium produced large sclerotia.
- Taxon
- RiceOryza sativat0
- Treatment
- basic medium plus prolinee0
- Interactor
- Rhizoctonia solaniRhizoctonia solanie1pathogen
- Outcome
- produced large sclerotiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“All the isolates grown on the basic medium plus proline produced large sclerotia.”
e1“Rhizoctonia solani causing rice sheath blight”
Claim · model-written summary
Tryptophan-supplemented medium poorly supported fungal mycelial growth and turned brown.
- Taxon
- RiceOryza sativat0
- Treatment
- tryptophan-added mediume0
- Interactor
- Rhizoctonia solaniRhizoctonia solanie1pathogen
- Outcome
- Mycelial growth of the funguse0
- Direction
- not welle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Mycelial growth of the fungus was not well in the tryptophan-added medium, showing brown discoloration of medium.”
e1“Rhizoctonia solani causing rice sheath blight”
The same questions in other papers
nitrogen · Rhizoctonia solani · Oryza sativa (rice)Results agree
3 papers in the same direction as this paper
- negative
- negative
- 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.