Abstract
One hundred thirty nine bacteria were isolated from rotten onions collected from main producing districts, Chang-Nyung, Eui-Ryung, and Ham-Yang in Korea. The (25 strains) of bacterial isolates have carboxymethylcellulase (CMCase) activity and the (74 strains) have polygalacturonase (PGase) activity. Thirty one among randomly selected 45 strains of PGase producing bacteria have pathogenicity to onions. The isolates were classified into Pseudomonas sp. (18 strains), Bacillus sp. (11 strains), Yers-inia sp. (7 strains), and others (9 strains) on the basis of FAMEs patterns. Eighteen strains of Pseudomonas sp. were mainly divided into three cluster in the dendrogram and only the two clusters of them showed pathogenicity to onions. CMCase and PGase activities of Pseudomonas sp. weaker than those of Bacillus sp.. However, the pathogenicity of pseudomonas sp. to soften onions was stronger than that of Bacillus sp. Inoculation of cfu of Pseudomonas sp. gives rise to softening of onions. Pseudomonas sp. was identified as Pseudomonas gladioli by biochemical and physiological characteristics. P. gladioli is the first reported bacterium as a pathogen of onion in Korea. In low temperature, P. gladioli showed better growth and higher PGase activity than those of Bacillus sp. identified as Bacillus subtilis. And pH 9.0 is optimal pH for PGase activity of B. subtilis while that of P. gladioli is pH which is the acidity of onions. Taken together, P. gladioli may be a main pathogene of onion rot during the cold storage condition.
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Claims 14
Claim · model-written summary
31 of 45 randomly selected PGase-producing strains were pathogenic to onions
- Taxon
- onions
Allium cepae1 - Interactor
- PGase producing bacteriae1pathogen
- Outcome
- pathogenicity to onionse1
- Value
- Thirty onee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Thirty one among randomly selected 45 strains of PGase producing bacteria have pathogenicity to onions”
Claim · model-written summary
Only two of three Pseudomonas sp. clusters showed pathogenicity to onions
- Taxon
- onionsAllium cepae2
- Interactor
- Pseudomonas sp.
Pseudomonase2pathogen - Outcome
- pathogenicity to onionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Eighteen strains of Pseudomonas sp. were mainly divided into three cluster in the dendrogram and only the two clusters of them showed pathogenicity to onions”
Claim · model-written summary
CMCase and PGase activities of Pseudomonas sp. were weaker than those of Bacillus sp.
- Taxon
- onionsAllium cepae0
- Interactor
- Pseudomonas sp.Pseudomonase3pathogen
- Outcome
- CMCase and PGase activitiese3
- Direction
- weakere3
- Comparator
- Bacillus spe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One hundred thirty nine bacteria were isolated from rotten onions collected from main producing districts”
e3“CMCase and PGase activities of Pseudomonas sp. weaker than those of Bacillus sp”
Claim · model-written summary
The 25 isolates had carboxymethylcellulase (CMCase) activity
- Taxon
- onionsAllium cepae0
- Outcome
- carboxymethylcellulase (CMCase) activitye4
- Value
- 25 strainse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One hundred thirty nine bacteria were isolated from rotten onions collected from main producing districts”
e4“The (25 strains) of bacterial isolates have carboxymethylcellulase (CMCase) activity”
Claim · model-written summary
74 isolates had polygalacturonase (PGase) activity
- Taxon
- onionsAllium cepae0
- Outcome
- polygalacturonase (PGase) activitye5
- Value
- 74 strainse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One hundred thirty nine bacteria were isolated from rotten onions collected from main producing districts”
e5“the (74 strains) have polygalacturonase (PGase) activity”
Claim · model-written summary
Inoculation with Pseudomonas sp. caused softening of onions
- Taxon
- onionsAllium cepae6
- Treatment
- Inoculation of cfu of Pseudomonas sp.e6
- Interactor
- Pseudomonas sp.Pseudomonase6pathogen
- Outcome
- softening of onionse6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Inoculation of cfu of Pseudomonas sp. gives rise to softening of onions”
Claim · model-written summary
Pathogenicity of Pseudomonas sp. to soften onions was stronger than that of Bacillus sp.
- Taxon
- onionsAllium cepae7
- Interactor
- pseudomonas sp.e7pathogen
- Outcome
- pathogenicitye7
- Direction
- strongere7
- Comparator
- Bacillus spe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“the pathogenicity of pseudomonas sp. to soften onions was stronger than that of Bacillus sp”
Claim · model-written summary
Pseudomonas sp. was identified as Pseudomonas gladioli
- Taxon
- onionsAllium cepae0
- Interactor
- Pseudomonas gladioli
Burkholderia gladiolie5pathogen - Outcome
- Pseudomonas sp. was identified as Pseudomonas gladiolie5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One hundred thirty nine bacteria were isolated from rotten onions collected from main producing districts”
e5“Pseudomonas sp. was identified as Pseudomonas gladioli by biochemical and physiological characteristics”
Claim · model-written summary
Pseudomonas gladioli is the first reported bacterial pathogen of onion in Korea
- Taxon
- onionAllium cepae6
- Interactor
- P. gladioliBurkholderia gladiolie6pathogen
- Outcome
- first reported bacterium as a pathogen of onione6
- Setting
- in Koreae6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“P. gladioli is the first reported bacterium as a pathogen of onion in Korea”
Claim · model-written summary
At low temperature P. gladioli grew better than Bacillus sp.
- Taxon
- onionsAllium cepae0
- Treatment
- low temperaturee7
- Interactor
- P. gladioliBurkholderia gladiolie7pathogen
- Outcome
- growthe7
- Direction
- bettere7
- Comparator
- Bacillus spe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One hundred thirty nine bacteria were isolated from rotten onions collected from main producing districts”
e7“In low temperature, P. gladioli showed better growth and higher PGase activity than those of Bacillus sp”
Claim · model-written summary
At low temperature P. gladioli had higher PGase activity than Bacillus sp.
- Taxon
- onionsAllium cepae0
- Treatment
- low temperaturee7
- Interactor
- P. gladioliBurkholderia gladiolie7pathogen
- Outcome
- PGase activitye7
- Direction
- highere7
- Comparator
- Bacillus spe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One hundred thirty nine bacteria were isolated from rotten onions collected from main producing districts”
e7“In low temperature, P. gladioli showed better growth and higher PGase activity than those of Bacillus sp”
Claim · model-written summary
The optimal pH for PGase activity of Bacillus subtilis is pH 9.0
- Taxon
- onionsAllium cepae6
- Interactor
- B. subtilis
Bacillus subtilise6other - Outcome
- optimal pH for PGase activitye6
- Value
- pH 9.0e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“And pH 9.0 is optimal pH for PGase activity of B. subtilis while that of P. gladioli is pH which is the acidity of onions”
Claim · model-written summary
The optimal pH for PGase activity of P. gladioli matches the acidity of onions
- Taxon
- onionsAllium cepae6
- Interactor
- P. gladioliBurkholderia gladiolie6pathogen
- Outcome
- optimal pH for PGase activitye6
- Value
- pH which is the acidity of onionse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“And pH 9.0 is optimal pH for PGase activity of B. subtilis while that of P. gladioli is pH which is the acidity of onions”
Claim · model-written summary
P. gladioli may be a main pathogen of onion rot during cold storage
- Taxon
- onionAllium cepae7
- Interactor
- P. gladioliBurkholderia gladiolie7pathogen
- Outcome
- onion rote7
- Setting
- cold storage conditione7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Taken together, P. gladioli may be a main pathogene of onion rot during the cold storage condition”
The same questions in other papers
inoculation · quality: postharvest · Allium cepa (onion)Positive and negative results
4 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
8 papers more in this group
See all 12 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.