Abstract
Representative isolates of Aspergillus niger, Botryodiplodia theobromae, Corticium rolfsii, Geotrichum candidum, Fusarium oxysporum and F solani recovered from rotten cocoyams were studied for the production of pectinolytic and cellulolytic enzymes. All the isolates elaborated high levels of hydrolase, lyase and pectinesterase in cocoyam tissue medium and lyase and pectinesterase in pectin medium. There were no significant differences in the overall levels of lyase and pectinesterase activities produced by all the isolates in both media. The level of hydrolase, lyase and pectinesterase activities individually produced by A niger, B theobromae and C rolfsii in both media was significantly higher than that of any other isolate. The highest hydrolase activity was produced by C rolfsii in cocoyam medium while A niger produced the highest lyase activity in pectin medium. Maximum pectinesterase activity was obtained from B theobromae and C rolfsii in pectin medium. All the test isolates produced cellulase in a medium containing carboxymethyl cellulose with C rolfsii showing significantly high activity followed by F oxysporum and A niger. © 1997 SCI.
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Claims 8
Claim · model-written summary
All isolates produced high hydrolase, lyase and pectinesterase in cocoyam tissue medium.
- Taxon
- cocoyams
_Colocasia_esculenta_-_Les_Martels%2C_Giroussens_Tarn.jpg?width=60)
Colocasia esculentae0 - Outcome
- high levels of hydrolase, lyase and pectinesterasee1
- Setting
- cocoyam tissue mediume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Colocasia_esculenta_-_Les_Martels%2C_Giroussens_Tarn.jpg?width=500)
Verbatim
e0“recovered from rotten cocoyams”
e1“All the isolates elaborated high levels of hydrolase, lyase and pectinesterase in cocoyam tissue medium”
Claim · model-written summary
All isolates produced lyase and pectinesterase in pectin medium.
- Taxon
- cocoyamsColocasia esculentae0
- Outcome
- lyase and pectinesterasee1
- Setting
- pectin mediume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“recovered from rotten cocoyams”
e1“lyase and pectinesterase in pectin medium”
Claim · model-written summary
Overall lyase and pectinesterase activities did not differ significantly across isolates in either medium.
- Taxon
- cocoyamsColocasia esculentae0
- Outcome
- overall levels of lyase and pectinesterase activitiese1
- Direction
- no significant differencese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rotten cocoyams”
e1“There were no significant differences in the overall levels of lyase and pectinesterase activities produced by all the isolates in both media.”
Claim · model-written summary
A niger, B theobromae and C rolfsii each produced higher hydrolase, lyase and pectinesterase activities than other isolates.
- Taxon
- cocoyamsColocasia esculentae0
- Outcome
- hydrolase, lyase and pectinesterase activitiese1
- Direction
- highere1
- Comparator
- any other isolatee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rotten cocoyams”
e1“The level of hydrolase, lyase and pectinesterase activities individually produced by A niger, B theobromae and C rolfsii in both media was significantly higher than that of any other isolate.”
Claim · model-written summary
C rolfsii produced the highest hydrolase activity in cocoyam medium.
- Taxon
- cocoyamsColocasia esculentae0
- Interactor
- C rolfsii
Agroathelia rolfsiie1pathogen - Outcome
- hydrolase activitye1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rotten cocoyams”
e1“The highest hydrolase activity was produced by C rolfsii in cocoyam medium”
Claim · model-written summary
A niger produced the highest lyase activity in pectin medium.
- Taxon
- cocoyamsColocasia esculentae0
- Interactor
- A niger
Aspergillus nigere1pathogen - Outcome
- lyase activitye1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rotten cocoyams”
e1“A niger produced the highest lyase activity in pectin medium”
Claim · model-written summary
B theobromae and C rolfsii yielded maximum pectinesterase activity in pectin medium.
- Taxon
- cocoyamsColocasia esculentae0
- Outcome
- pectinesterase activitye1
- Direction
- Maximume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rotten cocoyams”
e1“Maximum pectinesterase activity was obtained from B theobromae and C rolfsii in pectin medium.”
Claim · model-written summary
All test isolates produced cellulase in carboxymethyl cellulose medium, with C rolfsii highest, followed by F oxysporum and A niger.
- Taxon
- cocoyamsColocasia esculentae0
- Outcome
- cellulasee1
- Direction
- significantly highe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rotten cocoyams”
e1“All the test isolates produced cellulase in a medium containing carboxymethyl cellulose with C rolfsii showing significantly high activity followed by F oxysporum and A niger.”